Initial circular plot of observation chords by David Dunham
Initial ellipsoidal plot of observation chords by David Dunham
observation reports and explanation of above plots
Path showing location of observing sites
Notes on observations:
The sites are numbered with the station numbers used in the table of observers. In addition, G marks Globe, AZ and E marks Bill Peters' location southeast of Phoenix; no occultation occurred at those sites, as well as several others farther south in Arizona not shown. The occultation was also recorded photoelectrically at Lowell Observatory's Anderson Mesa station (A) and with portable telescopes at two sites whose approximate locations are marked with (P); a third portable Lowell site had about a 5-second event and was located near Mesa quite close, I think northeast of, station 8, but I don't have coordinates to plot its position on the map relative to station 8. Also, the timings from those sites are not yet available.
I did not plot the actual occultation path because it is so close to the predicted one. Sam Herchak was right at the true southern limit since he had only a short blink, and the CAMC southern limit passed only 1.5 km south of his location. Also, the path width used in the prediction was based on a 333-km diameter for Interamnia, and the ellipsoidal solution, whose major axis is inclined to the direction of motion by about 45 deg., gives a width in the skyplane in the direction perpendicular to the motion of 332 km, essentially the same as the prediction. At Interamnia's distance, 1.5 km = 1.1 milliarcsecond. That's a phenomenal prediction, but actually it's not quite that good when the actual topography of Interamnia is taken into account. The true southern part of Interamnia was depressed below the elliptical fit, as you have probably seen from Herchak's short chord (#8) on the figure for the event at this web site. The elliptical fit southern limit was 7.4 km south of Herchak's site, so relative to the elliptical fit, Federspiel's prediction was too far north by 5.9 km, or 0.0044". Of course, that's still extremely good; we'd be very happy to have more predictions accurate to better than 0.01"!
David
Path update chart, Dec 12 (D.Dunham)
The target star is in southern Perseus only 6' northwest of 5th-mag. SAO 56419. A finder chart for this event is on p. 49 of the 1996 Planetary Occultation Supplement to Occultation Newsletter, Vol. 6, No. 8, for North American Observers distributed with Occ'n Newsl. a year ago. That chart is also available here. (and here in a lower resolution format)
Larry Wassermann's updated predictions for the occultation can be found at Lowell Observatory's Web site.
A station sort file is available showing the event by location along tracks parallel to the path of the asteroid shadow.
Further observations have essentially confirmed the path for this occultation crossing the southern USA described in my Dec. 3rd message. Being such a large asteroid, it should be one of the best-predicted paths during the past few years, better than the last success, for (85) Io a year ago (that asteroid had about half the diameter of Interamnia). So although the star is only mag. 10.1 and the event occurs on a weekday morning during the hectic pre-holiday time, it is worth the effort to try it since the chances of seeing the occultation are so high. Also, this could be the first well-observed occultation of one of the large outer-belt dark asteroids, the first chance to determine a good outline of one of these objects.
Fortunately, the target star is easy to find, being only 6' northwest of 5th-mag. SAO 56419, which can easily be located in finder scopes in southern Perseus. You could locate the target star in the evening when it is convenient, so you can find it later after only a few minutes. Then get up 15 minutes before the event, find the star, and monitor it with a tape recorder or camcorder (used as a tape recorder) recording the time signals during the five minutes surrounding the closest approach time for your location shortly after 9h UT (** see below; the occultation shadow hits the East Coast at 9:06 UT and exits California shortly before 9:09 UT, with the predicted time probably accurate to less than half a minute; wherever you are in the s. USA, observing from 9:04 to 9:10 UT will catch the event **). You could be back in bed less than half an hour after getting up for it. BD +33 d. 633 is at J2000 R.A. 3h 24m 07.5s, Dec. +33 deg. 36' 19". For those just getting started with occultation timings, some basic information is given here and can be sent to you upon request by e-mail, if you don't have convenient Web access. An 8-inch or larger telescope is recommended, but under good conditions, the occultation might be seen with a 6-inch scope. If an occultation occurs, the combined light of the star and asteroid will drop abruptly by 0.9 mag. to the expected 10.3-mag. of Interamnia alone (but it could be two smaller drops if the star is a very close double), and the predicted central duration is 30 seconds.
The path of the occultation is shown on p. 70 of the February 1996 issue of Sky and Telescope, but the new observations show that the occultation will occur about 2.5 minutes earlier than the times indicated on that map. The path shown is almost identical to that predicted by Martin Federspiel from accurate meridian circle observations of both the star and the asteroid made with the Carlsburg Automated Meridian Circle (CAMC) on La Palma, Canary Islands; with dozens of observations of Interamnia from the CAMC regular program, Federspiel was able to determine the orbit well using that data in exactly the same system as the star. However, 9 measurements of the star and 21 of Interamnia have now been made during the last month with the U. S. Naval Observatory (USNO) meridian circle at Flagstaff, AZ, and Larry Wasserman's prediction from that is now half a path width south of the one shown on my S&T map. So I believe that the highest chances for seeing the occultation will be in the southern half of the zone shown on the S&T map (that is, between the central lines as predicted from the CAMC and USNO data), and that is where those travelling a long distance for the occultation are recommended to go, but there is also a high chance that the occultation will occur either in the northern half of the zone, or in the region from the plotted southern limit to half a path width south of it. There is a smaller chance that the occultation could be seen in a smaller area just outside those described, such as just north of Bakersfield and Las Vegas; Puela, CO; Wichita, KS; Knoxville and Charlotte on the north side, or from San Pedro Martir Obs. (Baja California), Las Cruces, area between Dallas and Waco, Baton Rouge, Mobile, Tallahassee, Gainesville, and Daytona Beach on the south side. In any case, observers throughout that region should observe from their fixed-site observatories, or if mobile, should travel towards the center lines to increase their chances for seeing the event. In order to optimize coverage of the mobil observers, please *** LET ME KNOW *** if you plan to observe this event with a quick message saying if you will be mobile or not (I already have a few responses from the Dec. 3rd message). If you reply after 0h UT Dec. 14 and before 13h UT Dec. 16, it would be best to copy or send the message instead to my home e-mail address, dunham@erols.com. We will organize by parallel tracks counted perpendicularly from the Dec. 2nd USNO prediction described below. When the weather forecast becomes more definite Monday morning, I will distribute a message saying which tracks have been confirmed or are likely to be filled, and recommending mobile observers to select other tracks.
A map, more detailed than the one in S&T, shows the USNO (Dec. 2nd) and CAMC predictions, the total area in which we want to try to coordinate observations, and many cities; it is here Besides IOTA's site, updates and other information are also available on Lowell Observatory's Web site.
Interamnia is expected to be 333 km in diameter, from IRAS measurements that are probably accurate to about 10%. The shadow projects to cover a slightly larger area that should be about 380 km wide. The 333 km expected diameter subtends 0.247". The CAMC astrometry claims to be among the best in the world, and comparison with Hipparcos data substantiate those claims, but it has not yet been tested with an observed asteroidal occultation. The similar USNO-Flagstaff astrometry predicted one event almost exactly (I believe that was the 1995 Jan. Zelinda occultation), but their prediction was about 0.10" too far north, in that case about a path-width, for the (85) Io occultation last December. That difference is similar to the CAMC - USNO difference for the Interamnia occultation, so it will be interesting to see which is closer to the truth. CCD observers are encouraged to make astrometric observations during the night or two before the event when both objects might be imaged in the same CCD field (they are closing at a rate of 12'/day), to possibly improve the prediction or to at least see (possibly after the fact) how well they could have predicted the path to gauge how useful this might be in the future. For example, for the (85) Io occultation, Gordon Garradd obtained CCD observations the night before the event with the 1m telescope at the Anglo-Australian Observatory, and they predicted the event to within about 0.10" to the south. In other words, an average of the USNO prediction and Garradd's data would have predicted that event almost exactly.
Please spread the word, and finder charts, about this occultation to observers in your region to encourage as many observations as possible. The following Web sites are good for locating resources in your State or region, and I use them extensively, but there are now so many possibilities that I ask regional coordinators to help with this:
http://www.skypub.com/astrodir/astrodir.html (Sky Publishing Corp.)
http://www.mcs.net/~bstevens/al/society.html (Astronomical League)
http://www.rahul.net/resource/regular/clubs-etc/clubsetc.html
Also, NOT ALL OBSERVERS HAVE E-MAIL. Please telephone those in your area who have large-enough telescopes. This is useful even for those with e- mail, since some don't read their e-mail very frequently. Especially, contact observers of previous asteroidal occultations in your region who don't have e-mail; at least 3 in Arizona who observed the 1993 Oct. Euterpe occultation are in this category, as far as I know. Observations are already being organized in Arizona, so if you plan to observe there, you should contact those coordinators: lhw@lowell.edu (Larry Wasserman, Lowell Obs., Flagstaff); bpeters@asu.edu (Bill Peters, EVAC, phone 602-813-4242); and rhill@lpl.arizona.edu (Rik Hill, Lunar & Planetary Lab., Tucson).
The occultation will most likely take place somewhere between the the northernmost and southernmost parallel paths shown on the map , within "Track 280N" and "Track 200S". 1 track is 0.001" in the sky or 1.55 km on the ground. Tracks are counted north (N) and south (S) of the nominal path, in this case, the Dec. 2nd USNO prediction. The updated (Dec. 12th) USNO predicted central line is at about track 30S, so the new USNO northern limit is at about 94N and the southern limit is at 154S. The CAMC central line is at track 98N, its northern limit is at 222N, and the southern limit is at 26S. Mobile observers can use tables of track coordinates to plot on ONC Aeronautical charts, USGS state index, or other maps to locate sites. Tables of latitudes at 1-deg. intervals of longitude for tracks at 40-track intervals will soon be posted on our www.anomalies.com/iota Web site, and are also available upon request by e-mail; I will send them to a few whom I know will be interested. They are mainly for the benefit of mobile observers, and will be used in conjunction with the fixed-station track sort, which I will produce and distribute later today. That will tell you which tracks are covered by known observers, and where gaps in the coverage are that need to be filled.
On the map, lines of equal time at half-minute intervals are labelled
in U.T. on the map; the local time of the event, on Mon. night-actually
Tues. morning, Dec. 17, ranges from 4:05 am E.S.T. on the Atlantic Coast,
to 3:06 am C.S.T. in the Central time zone, to 2:07 am M.S.T. in the Rocky
Mountain region, to 1:08 am P.S.T. in California.
Some predicted data for the central lines are given below.
**** CAMC prediction (Track 98N) ****
TRACK 0 CENTER FOR 704 Interamnia SAO 0 DATE 1996 DEC 17
W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT.
67.000 26 53.9 82.000 33 22.1 97.000 35 50.5 112.000 35 5.8
68.000 27 29.3 83.000 33 38.6 98.000 35 53.3 113.000 34 56.1
69.000 28 3.1 84.000 33 54.1 99.000 35 55.4 114.000 34 45.4
70.000 28 35.5 85.000 34 8.5 100.000 35 56.5 115.000 34 33.9
71.000 29 6.4 86.000 34 22.0 101.000 35 56.9 116.000 34 21.5
72.000 29 35.9 87.000 34 34.6 102.000 35 56.4 117.000 34 8.1
73.000 30 4.0 88.000 34 46.2 103.000 35 55.1 118.000 33 53.8
74.000 30 30.8 89.000 34 56.9 104.000 35 53.0 119.000 33 38.6
75.000 30 56.3 90.000 35 6.7 105.000 35 50.0 120.000 33 22.4
76.000 31 20.6 91.000 35 15.5 106.000 35 46.3 121.000 33 5.2
77.000 31 43.7 92.000 35 23.5 107.000 35 41.6 122.000 32 47.0
78.000 32 5.6 93.000 35 30.6 108.000 35 36.2 123.000 32 27.8
79.000 32 26.4 94.000 35 36.9 109.000 35 29.9 124.000 32 7.6
80.000 32 46.0 95.000 35 42.3 110.000 35 22.7 125.000 31 46.2
81.000 33 4.6 96.000 35 46.8 111.000 35 14.7 0.000 0 0.0
h m s
AT U.T. 9 6 0, W. LONG.= 84.658, LAT.= 34.062
AT U.T. 9 7 0, W. LONG.= 99.546, LAT.= 35.935
AT U.T. 9 8 0, W. LONG.= 110.900, LAT.= 35.259
AT U.T. 9 9 0, W. LONG.= 120.209, LAT.= 33.315
**** USNO Dec. 2nd prediction, used as the reference (Track 0) ****
Note that their predicted path updated Dec. 12 is about
30 tracks, or 46 km, south of this line.
CENTER PATH IS ABOUT 382. KM WIDE AT THE COORDINATES LISTED BELOW
UNIV. TIME Interamnia SUN MOON
LONGITUDE LATITUDE H M S ALT. AZI. ALT. AZI. ALT.
78.15 W 30.67 9 5 26.7 13.8 301.1 -37.4 97.3 -47.4
80.06 W 31.33 9 5 31.8 15.5 300.2 -39.1 96.0 -45.7
82.00 W 31.93 9 5 37.4 17.2 299.3 -40.8 94.6 -44.1
83.98 W 32.47 9 5 43.6 19.0 298.4 -42.5 93.2 -42.4
86.00 W 32.95 9 5 50.4 20.7 297.4 -44.1 91.7 -40.8
88.05 W 33.37 9 5 57.7 22.4 296.5 -45.8 90.2 -39.1
90.13 W 33.74 9 6 5.6 24.0 295.5 -47.5 88.7 -37.5
94.36 W 34.26 9 6 22.9 27.4 293.6 -51.0 85.5 -34.2
98.65 W 34.53 9 6 42.3 30.7 291.9 -54.4 82.3 -31.0
102.98 W 34.54 9 7 3.6 34.0 290.3 -57.8 79.1 -27.8
107.29 W 34.28 9 7 26.7 37.2 288.9 -61.3 75.8 -24.6
111.55 W 33.75 9 7 51.7 40.3 287.8 -64.7 72.6 -21.4
115.73 W 32.98 9 8 18.2 43.3 287.2 -68.2 69.6 -18.3
117.78 W 32.50 9 8 32.0 44.7 287.0 -69.9 68.1 -16.8
119.80 W 31.96 9 8 46.2 46.2 287.0 -71.7 66.6 -15.2
121.78 W 31.36 9 9 0.7 47.5 287.1 -73.4 65.2 -13.7
TRACK 0 CENTER FOR 704 Interamnia SAO 0 DATE 1996 DEC 17
W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT.
68.000 25 52.0 83.000 32 12.5 98.000 34 30.6 113.000 33 30.8
69.000 26 27.0 84.000 32 28.4 99.000 34 32.6 114.000 33 19.8
70.000 27 0.3 85.000 32 43.2 100.000 34 33.8 115.000 33 7.9
71.000 27 32.2 86.000 32 57.1 101.000 34 34.1 116.000 32 55.0
72.000 28 2.6 87.000 33 10.0 102.000 34 33.5 117.000 32 41.2
73.000 28 31.6 88.000 33 21.9 103.000 34 32.2 118.000 32 26.5
74.000 28 59.2 89.000 33 32.8 104.000 34 29.9 119.000 32 10.7
75.000 29 25.5 90.000 33 42.9 105.000 34 26.8 120.000 31 54.0
76.000 29 50.5 91.000 33 51.9 106.000 34 22.9 121.000 31 36.2
77.000 30 14.3 92.000 34 0.1 107.000 34 18.1 122.000 31 17.4
78.000 30 36.8 93.000 34 7.4 108.000 34 12.4 123.000 30 57.5
79.000 30 58.2 94.000 34 13.8 109.000 34 5.8 124.000 30 36.6
80.000 31 18.4 95.000 34 19.3 110.000 33 58.4 125.000 30 14.6
81.000 31 37.5 96.000 34 23.9 111.000 33 50.1 0.000 0 0.0
82.000 31 55.5 97.000 34 27.7 112.000 33 40.9 0.000 0 0.0
h m s
AT U.T. 9 5 30, W. LONG.= 79.399, LAT.= 31.107
AT U.T. 9 6 0, W. LONG.= 88.666, LAT.= 33.488
AT U.T. 9 6 30, W. LONG.= 95.982, LAT.= 34.397
AT U.T. 9 7 0, W. LONG.= 102.277, LAT.= 34.554
AT U.T. 9 7 30, W. LONG.= 107.864, LAT.= 34.220
AT U.T. 9 8 0, W. LONG.= 112.902, LAT.= 33.531
AT U.T. 9 8 30, W. LONG.= 117.487, LAT.= 32.569
AT U.T. 9 9 0, W. LONG.= 121.686, LAT.= 31.390
TRACK 280 NORTH FOR 704 Interamnia BD +33 633 DATE 1996 DEC 17 W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. 77.000 34 26.5 89.000 37 28.0 101.000 38 23.8 113.000 37 25.0 78.000 34 47.1 90.000 37 37.2 102.000 38 23.2 114.000 37 14.8 79.000 35 6.6 91.000 37 45.5 103.000 38 21.9 115.000 37 3.7 80.000 35 25.1 92.000 37 52.9 104.000 38 19.8 116.000 36 51.8 81.000 35 42.5 93.000 37 59.6 105.000 38 16.9 117.000 36 39.1 82.000 35 59.0 94.000 38 5.4 106.000 38 13.2 118.000 36 25.4 83.000 36 14.5 95.000 38 10.4 107.000 38 8.8 119.000 36 10.8 84.000 36 29.0 96.000 38 14.6 108.000 38 3.5 120.000 35 55.4 85.000 36 42.6 97.000 38 18.1 109.000 37 57.4 121.000 35 39.0 86.000 36 55.3 98.000 38 20.7 110.000 37 50.5 122.000 35 21.6 87.000 37 7.1 99.000 38 22.5 111.000 37 42.8 0.000 0 0.0 88.000 37 18.0 100.000 38 23.5 112.000 37 34.3 0.000 0 0.0 TRACK 240 NORTH FOR 704 Interamnia BD +33 633 DATE 1996 DEC 17 W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. 77.000 33 51.1 89.000 36 54.9 101.000 37 51.4 113.000 36 52.0 78.000 34 11.9 90.000 37 4.2 102.000 37 50.9 114.000 36 41.7 79.000 34 31.7 91.000 37 12.6 103.000 37 49.6 115.000 36 30.5 80.000 34 50.4 92.000 37 20.2 104.000 37 47.4 116.000 36 18.5 81.000 35 8.1 93.000 37 26.9 105.000 37 44.5 117.000 36 5.6 82.000 35 24.8 94.000 37 32.8 106.000 37 40.8 118.000 35 51.8 83.000 35 40.5 95.000 37 37.9 107.000 37 36.3 119.000 35 37.1 84.000 35 55.2 96.000 37 42.2 108.000 37 30.9 120.000 35 21.4 85.000 36 9.0 97.000 37 45.6 109.000 37 24.8 121.000 35 4.8 86.000 36 21.8 98.000 37 48.3 110.000 37 17.8 122.000 34 47.3 87.000 36 33.7 99.000 37 50.1 111.000 37 10.1 0.000 0 0.0 88.000 36 44.8 100.000 37 51.2 112.000 37 1.5 0.000 0 0.0 TRACK 200 NORTH FOR 704 Interamnia BD +33 633 DATE 1996 DEC 17 W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. 77.000 33 15.5 89.000 36 21.7 101.000 37 18.9 113.000 36 18.9 78.000 33 36.6 90.000 36 31.1 102.000 37 18.4 114.000 36 8.5 79.000 33 56.6 91.000 36 39.6 103.000 37 17.1 115.000 35 57.2 80.000 34 15.6 92.000 36 47.3 104.000 37 14.9 116.000 35 45.0 81.000 34 33.5 93.000 36 54.1 105.000 37 12.0 117.000 35 32.0 82.000 34 50.4 94.000 37 0.1 106.000 37 8.2 118.000 35 18.0 83.000 35 6.3 95.000 37 5.2 107.000 37 3.6 119.000 35 3.1 84.000 35 21.2 96.000 37 9.5 108.000 36 58.3 120.000 34 47.3 85.000 35 35.1 97.000 37 13.0 109.000 36 52.1 121.000 34 30.5 86.000 35 48.1 98.000 37 15.7 110.000 36 45.0 122.000 34 12.8 87.000 36 0.2 99.000 37 17.6 111.000 36 37.2 0.000 0 0.0 88.000 36 11.4 100.000 37 18.7 112.000 36 28.4 0.000 0 0.0 TRACK 160 NORTH FOR 704 Interamnia BD +33 633 DATE 1996 DEC 17 W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. 77.000 32 39.7 89.000 35 48.3 101.000 36 46.3 113.000 35 45.6 78.000 33 1.1 90.000 35 57.8 102.000 36 45.8 114.000 35 35.1 79.000 33 21.4 91.000 36 6.4 103.000 36 44.4 115.000 35 23.7 80.000 33 40.6 92.000 36 14.2 104.000 36 42.2 116.000 35 11.4 81.000 33 58.7 93.000 36 21.1 105.000 36 39.3 117.000 34 58.2 82.000 34 15.8 94.000 36 27.1 106.000 36 35.5 118.000 34 44.1 83.000 34 31.9 95.000 36 32.4 107.000 36 30.9 119.000 34 29.0 84.000 34 47.0 96.000 36 36.7 108.000 36 25.4 120.000 34 13.0 85.000 35 1.1 97.000 36 40.3 109.000 36 19.1 121.000 33 56.0 86.000 35 14.3 98.000 36 43.0 110.000 36 12.0 122.000 33 38.1 87.000 35 26.5 99.000 36 44.9 111.000 36 4.1 0.000 0 0.0 88.000 35 37.9 100.000 36 46.0 112.000 35 55.3 0.000 0 0.0 TRACK 120 NORTH FOR 704 Interamnia BD +33 633 DATE 1996 DEC 17 W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. 77.000 32 3.7 89.000 35 14.7 101.000 36 13.5 113.000 35 12.2 78.000 32 25.4 90.000 35 24.3 102.000 36 13.0 114.000 35 1.5 79.000 32 45.9 91.000 35 33.1 103.000 36 11.6 115.000 34 50.0 80.000 33 5.4 92.000 35 40.9 104.000 36 9.4 116.000 34 37.6 81.000 33 23.7 93.000 35 47.9 105.000 36 6.4 117.000 34 24.2 82.000 33 41.1 94.000 35 54.1 106.000 36 2.6 118.000 34 9.9 83.000 33 57.4 95.000 35 59.3 107.000 35 57.9 119.000 33 54.7 84.000 34 12.6 96.000 36 3.8 108.000 35 52.4 120.000 33 38.5 85.000 34 26.9 97.000 36 7.4 109.000 35 46.1 121.000 33 21.4 86.000 34 40.3 98.000 36 10.2 110.000 35 38.9 122.000 33 3.2 87.000 34 52.7 99.000 36 12.1 111.000 35 30.9 0.000 0 0.0 88.000 35 4.1 100.000 36 13.2 112.000 35 22.0 0.000 0 0.0 TRACK 80 NORTH FOR 704 Interamnia BD +33 633 DATE 1996 DEC 17 W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. 77.000 31 27.5 89.000 34 40.9 101.000 35 40.5 113.000 34 38.6 78.000 31 49.4 90.000 34 50.7 102.000 35 40.0 114.000 34 27.8 79.000 32 10.2 91.000 34 59.5 103.000 35 38.6 115.000 34 16.2 80.000 32 29.9 92.000 35 7.5 104.000 35 36.4 116.000 34 3.6 81.000 32 48.5 93.000 35 14.6 105.000 35 33.4 117.000 33 50.1 82.000 33 6.1 94.000 35 20.8 106.000 35 29.5 118.000 33 35.6 83.000 33 22.6 95.000 35 26.2 107.000 35 24.8 119.000 33 20.2 84.000 33 38.1 96.000 35 30.7 108.000 35 19.2 120.000 33 3.9 85.000 33 52.6 97.000 35 34.3 109.000 35 12.8 121.000 32 46.5 86.000 34 6.1 98.000 35 37.1 110.000 35 5.6 122.000 32 28.1 87.000 34 18.6 99.000 35 39.1 111.000 34 57.5 0.000 0 0.0 88.000 34 30.2 100.000 35 40.2 112.000 34 48.5 0.000 0 0.0 TRACK 40 NORTH FOR 704 Interamnia BD +33 633 DATE 1996 DEC 17 W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. 77.000 30 51.0 89.000 34 7.0 101.000 35 7.4 113.000 34 4.8 78.000 31 13.2 90.000 34 16.9 102.000 35 6.9 114.000 33 53.9 79.000 31 34.3 91.000 34 25.8 103.000 35 5.5 115.000 33 42.1 80.000 31 54.3 92.000 34 33.9 104.000 35 3.3 116.000 33 29.4 81.000 32 13.1 93.000 34 41.1 105.000 35 0.2 117.000 33 15.7 82.000 32 30.9 94.000 34 47.4 106.000 34 56.3 118.000 33 1.1 83.000 32 47.6 95.000 34 52.8 107.000 34 51.5 119.000 32 45.6 84.000 33 3.3 96.000 34 57.4 108.000 34 45.9 120.000 32 29.0 85.000 33 18.0 97.000 35 1.1 109.000 34 39.4 121.000 32 11.4 86.000 33 31.7 98.000 35 3.9 110.000 34 32.1 122.000 31 52.9 87.000 33 44.4 99.000 35 5.9 111.000 34 23.9 0.000 0 0.0 88.000 33 56.2 100.000 35 7.1 112.000 34 14.8 0.000 0 0.0 TRACK 0 CENTER FOR 704 Interamnia BD +33 633 DATE 1996 DEC 17 W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. 77.000 30 14.3 89.000 33 32.8 101.000 34 34.1 113.000 33 30.8 78.000 30 36.8 90.000 33 42.9 102.000 34 33.5 114.000 33 19.8 79.000 30 58.2 91.000 33 51.9 103.000 34 32.2 115.000 33 7.9 80.000 31 18.4 92.000 34 0.1 104.000 34 29.9 116.000 32 55.0 81.000 31 37.5 93.000 34 7.4 105.000 34 26.8 117.000 32 41.2 82.000 31 55.5 94.000 34 13.8 106.000 34 22.9 118.000 32 26.5 83.000 32 12.5 95.000 34 19.3 107.000 34 18.1 119.000 32 10.7 84.000 32 28.4 96.000 34 23.9 108.000 34 12.4 120.000 31 54.0 85.000 32 43.2 97.000 34 27.7 109.000 34 5.8 121.000 31 36.2 86.000 32 57.1 98.000 34 30.6 110.000 33 58.4 122.000 31 17.4 87.000 33 10.0 99.000 34 32.6 111.000 33 50.1 0.000 0 0.0 88.000 33 21.9 100.000 34 33.8 112.000 33 40.9 0.000 0 0.0 TRACK 40 SOUTH FOR 704 Interamnia BD +33 633 DATE 1996 DEC 17 W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. 77.000 29 37.3 89.000 32 58.5 101.000 34 0.6 113.000 32 56.7 78.000 30 0.2 90.000 33 8.6 102.000 34 0.0 114.000 32 45.6 79.000 30 21.8 91.000 33 17.9 103.000 33 58.6 115.000 32 33.5 80.000 30 42.3 92.000 33 26.1 104.000 33 56.4 116.000 32 20.5 81.000 31 1.7 93.000 33 33.5 105.000 33 53.3 117.000 32 6.5 82.000 31 19.9 94.000 33 40.0 106.000 33 49.3 118.000 31 51.6 83.000 31 37.1 95.000 33 45.6 107.000 33 44.4 119.000 31 35.6 84.000 31 53.2 96.000 33 50.2 108.000 33 38.7 120.000 31 18.7 85.000 32 8.2 97.000 33 54.1 109.000 33 32.1 121.000 31 0.7 86.000 32 22.3 98.000 33 57.0 110.000 33 24.6 122.000 30 41.7 87.000 32 35.3 99.000 33 59.1 111.000 33 16.2 0.000 0 0.0 88.000 32 47.4 100.000 34 0.2 112.000 33 6.9 0.000 0 0.0 TRACK 80 SOUTH FOR 704 Interamnia BD +33 633 DATE 1996 DEC 17 W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. 77.000 29 0.1 89.000 32 24.0 101.000 33 26.9 113.000 32 22.3 78.000 29 23.2 90.000 32 34.2 102.000 33 26.4 114.000 32 11.1 79.000 29 45.2 91.000 32 43.6 103.000 33 25.0 115.000 31 58.9 80.000 30 6.0 92.000 32 52.0 104.000 33 22.7 116.000 31 45.7 81.000 30 25.6 93.000 32 59.4 105.000 33 19.5 117.000 31 31.6 82.000 30 44.1 94.000 33 6.0 106.000 33 15.5 118.000 31 16.5 83.000 31 1.5 95.000 33 11.6 107.000 33 10.6 119.000 31 0.4 84.000 31 17.8 96.000 33 16.4 108.000 33 4.8 120.000 30 43.2 85.000 31 33.0 97.000 33 20.3 109.000 32 58.1 121.000 30 25.0 86.000 31 47.3 98.000 33 23.2 110.000 32 50.5 122.000 30 5.8 87.000 32 0.5 99.000 33 25.3 111.000 32 42.0 0.000 0 0.0 88.000 32 12.7 100.000 33 26.6 112.000 32 32.6 0.000 0 0.0 TRACK 120 SOUTH FOR 704 Interamnia BD +33 633 DATE 1996 DEC 17 W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. 77.000 28 22.6 89.000 31 49.2 101.000 32 53.0 113.000 31 47.8 78.000 28 46.1 90.000 31 59.6 102.000 32 52.5 114.000 31 36.4 79.000 29 8.3 91.000 32 9.1 103.000 32 51.1 115.000 31 24.1 80.000 29 29.4 92.000 32 17.6 104.000 32 48.8 116.000 31 10.7 81.000 29 49.2 93.000 32 25.2 105.000 32 45.6 117.000 30 56.5 82.000 30 8.0 94.000 32 31.8 106.000 32 41.5 118.000 30 41.2 83.000 30 25.6 95.000 32 37.5 107.000 32 36.6 119.000 30 24.9 84.000 30 42.1 96.000 32 42.4 108.000 32 30.7 120.000 30 7.5 85.000 30 57.6 97.000 32 46.3 109.000 32 24.0 121.000 29 49.1 86.000 31 12.0 98.000 32 49.3 110.000 32 16.3 122.000 29 29.7 87.000 31 25.4 99.000 32 51.4 111.000 32 7.7 0.000 0 0.0 88.000 31 37.8 100.000 32 52.7 112.000 31 58.2 0.000 0 0.0 TRACK 160 SOUTH FOR 704 Interamnia BD +33 633 DATE 1996 DEC 17 W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. 77.000 27 44.8 89.000 31 14.2 101.000 32 18.9 113.000 31 13.0 78.000 28 8.6 90.000 31 24.8 102.000 32 18.4 114.000 31 1.5 79.000 28 31.2 91.000 31 34.4 103.000 32 17.0 115.000 30 49.0 80.000 28 52.5 92.000 31 43.0 104.000 32 14.7 116.000 30 35.6 81.000 29 12.7 93.000 31 50.7 105.000 32 11.5 117.000 30 21.1 82.000 29 31.6 94.000 31 57.4 106.000 32 7.4 118.000 30 5.6 83.000 29 49.5 95.000 32 3.2 107.000 32 2.3 119.000 29 49.1 84.000 30 6.3 96.000 32 8.1 108.000 31 56.4 120.000 29 31.6 85.000 30 21.9 97.000 32 12.1 109.000 31 49.6 121.000 29 13.0 86.000 30 36.6 98.000 32 15.1 110.000 31 41.8 122.000 28 53.3 87.000 30 50.1 99.000 32 17.3 111.000 31 33.2 0.000 0 0.0 88.000 31 2.7 100.000 32 18.6 112.000 31 23.6 0.000 0 0.0 TRACK 200 SOUTH FOR 704 Interamnia BD +33 633 DATE 1996 DEC 17 W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. W. LONG. LAT. 77.000 27 6.7 89.000 30 39.0 101.000 31 44.6 113.000 30 38.0 78.000 27 30.9 90.000 30 49.7 102.000 31 44.1 114.000 30 26.4 79.000 27 53.7 91.000 30 59.4 103.000 31 42.7 115.000 30 13.8 80.000 28 15.4 92.000 31 8.2 104.000 31 40.4 116.000 30 0.1 81.000 28 35.8 93.000 31 16.0 105.000 31 37.1 117.000 29 45.5 82.000 28 55.1 94.000 31 22.8 106.000 31 33.0 118.000 29 29.9 83.000 29 13.2 95.000 31 28.7 107.000 31 27.9 119.000 29 13.2 84.000 29 30.1 96.000 31 33.6 108.000 31 21.9 120.000 28 55.4 85.000 29 46.0 97.000 31 37.7 109.000 31 15.0 121.000 28 36.6 86.000 30 0.8 98.000 31 40.8 110.000 31 7.2 122.000 28 16.6 87.000 30 14.6 99.000 31 43.0 111.000 30 58.4 0.000 0 0.0 88.000 30 27.3 100.000 31 44.3 112.000 30 48.7 0.000 0 0.0