Update for (1036) Ganymed - October 5, 1998
Update computed by Martin Federspiel; issued 25 Sep 1998 17:19:58 +0200 (CEST)
Martin Federspiel's update
IOTA/IOTA-ES occultation update for
(1036) Ganymed/TYC 2362 03079 event on 1998 October 5
visible from southwestern Ireland, western Bretagne,
Pic du Midi, Balearean Islands
Summary
Shortly after midnight of 1998 October 5 the fast-moving asteroid (1036)
will occult an 11 mag star in Perseus. Due to the good data and the
relatively small distance of the asteroid this event can be predicted with
extraordinary precision. However, the star is faint, the magnitude drop is
0.3 mag only and the full moon is disturbing. The path crosses directly
over the Pic du Midi observatory.
The event at one glimpse:
* date and approx. UT time of event: 1998 October 5 @ 1h UT
* magnitude of target star: 11.0
* magnitude drop [mag]: 0.3
* estimated maximum duration [s]: 3
* rough path description: southwestern Ireland, esternmost Bretagne,
Pyrenees (Pic du Midi!), northeastern Spain (Tarragona, Mallorca),
Algeria
The occultation path:
* approximate widths [km]: 40
* more detailed path description: I. de Sein (Bretagne), 50 km northeast
of Biarritz, Pic du Midi, Lerida (Spain), coast 30 km southwest of
Tarragona, sea between Ibiza and Mallorca
* uncertainty [path widths]: 1
* map: attached
* remarks: more than 1" eastward shift due to new orbit and star position
compared to Goffin's nominal prediction
Data for the target star:
* name: TYC 2362 03079
* constellation: southern Perseus, east of Zeta Persei
* J2000 position [h,m,s; °,',"]: RA 4h 5m 39.990s DE +32° 0' 19.02"
* position source: ACT
* estimated accuracy ["]: 0.05
* V mag [mag]: 11.01
* remarks: star flagged X in Tycho catalogue (problematic astrometric data)
Data for the minor planet:
* general information:
mumber, name: (1036) Ganymed
approx. diameter [km]: 41
* orbital information
orbit source: Federspiel
source of used astrometry: 30 USNO positions, 1 TMO
number of used observations: 31
number of rejected observations: 0
time covered by the observations: 1998 June 29 - 1998 Sep 24
rms residuals ["] (RA,DE): 0.06, 0.06
estimated positional accuracy at epoch of event ["]: 0.10"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 1998h 10m 5s @ 1h 1m 34s UT
* least geocentric distance ["]: 6.97
* uncertainty in time [s]: 3
* approx. V mag of minor planet at event [mag]: 9.7
* geocentric parallax of minor planet ["]: 18.62
* magnitude drop [mag]: 0.3
* estimated maximum duration [s]: 3
* apparent motion of minor planet ["/h]: 135.22
* angular distance to moon, phase of moon [°,%]: 66°, 99%
* remarks:
Calculator(s): Federspiel
Path coordinates:
Lat. Long. hh:mm:ss UT StarAlt° StarAzi° SunAlt° SunAzi°
55.97 -88.28 0:54: 5. ! 10.6 46.6 -13.8 282.6
59.91 -76.86 0:54:21. ! 17.8 56.1 -18.4 294.0
61.76 -67.14 0:54:38. ! 22.9 64.4 -21.7 304.0
62.57 -58.36 0:54:54. ! 27.0 71.9 -24.4 313.2
62.70 -50.41 0:55:11. ! 30.6 78.5 -26.8 321.6
62.34 -43.31 0:55:27. ! 33.8 84.4 -29.0 329.3
61.62 -37.01 0:55:44. ! 36.7 89.4 -31.0 336.3
60.64 -31.49 0:56: 0. ! 39.4 93.6 -32.9 342.5
59.47 -26.65 0:56:17. ! 42.0 97.0 -34.6 348.2
58.14 -22.42 0:56:33. ! 44.4 99.8 -36.3 353.3
56.72 -18.71 0:56:50. ! 46.7 101.9 -37.9 357.9
55.21 -15.46 0:57: 6. ! 48.8 103.5 -39.4 2.1
53.64 -12.59 0:57:23. ! 50.8 104.6 -40.8 6.1
52.02 -10.06 0:57:39. ! 52.8 105.2 -42.2 9.7
50.37 -7.81 0:57:56. ! 54.6 105.3 -43.5 13.1
48.70 -5.80 0:58:12. ! 56.3 105.1 -44.8 16.4
47.00 -4.00 0:58:29. ! 58.0 104.4 -46.0 19.5
45.29 -2.38 0:58:45. ! 59.5 103.4 -47.2 22.5
43.57 -.92 0:59: 2. ! 61.0 101.9 -48.3 25.5
41.83 .41 0:59:18. ! 62.3 100.1 -49.4 28.4
40.09 1.61 0:59:35. ! 63.5 97.8 -50.4 31.2
38.34 2.70 0:59:52. ! 64.6 95.2 -51.4 34.1
36.58 3.71 1: 0: 8. ! 65.6 92.2 -52.4 36.9
34.82 4.62 1: 0:25. ! 66.4 88.8 -53.3 39.8
33.04 5.46 1: 0:41. ! 67.1 85.1 -54.1 42.6
31.26 6.24 1: 0:58. ! 67.6 81.1 -54.9 45.5
29.47 6.95 1: 1:14. ! 67.9 76.9 -55.6 48.5
27.67 7.61 1: 1:31. ! 68.0 72.6 -56.3 51.5
25.85 8.21 1: 1:47. ! 68.0 68.1 -56.9 54.5
24.03 8.77 1: 2: 4. ! 67.8 63.7 -57.4 57.6
22.19 9.29 1: 2:20. ! 67.4 59.4 -57.9 60.8
20.33 9.76 1: 2:37. ! 66.8 55.3 -58.3 64.0
18.46 10.20 1: 2:53. ! 66.0 51.4 -58.7 67.3
16.57 10.61 1: 3:10. ! 65.2 47.7 -58.9 70.6
14.66 10.98 1: 3:26. ! 64.1 44.3 -59.1 74.0
12.72 11.32 1: 3:43. ! 63.0 41.1 -59.2 77.4
10.75 11.63 1: 3:59. ! 61.7 38.3 -59.2 80.8
8.76 11.91 1: 4:16. ! 60.3 35.7 -59.1 84.3
6.73 12.16 1: 4:32. ! 58.8 33.3 -58.9 87.7
4.66 12.39 1: 4:49. ! 57.2 31.2 -58.7 91.2
2.55 12.59 1: 5: 5. ! 55.6 29.2 -58.3 94.6
.39 12.76 1: 5:22. ! 53.8 27.5 -57.8 98.0
-1.82 12.90 1: 5:39. ! 51.9 25.9 -57.2 101.4
-4.10 13.01 1: 5:55. ! 49.9 24.5 -56.6 104.7
-6.45 13.09 1: 6:12. ! 47.8 23.3 -55.7 108.0
-8.88 13.13 1: 6:28. ! 45.6 22.2 -54.8 111.2
-11.41 13.14 1: 6:45. ! 43.3 21.2 -53.8 114.4
-14.05 13.10 1: 7: 1. ! 40.8 20.3 -52.6 117.6
-16.83 13.01 1: 7:18. ! 38.2 19.5 -51.3 120.7
-19.79 12.85 1: 7:34. ! 35.4 18.9 -49.7 123.8
-22.97 12.61 1: 7:51. ! 32.3 18.4 -48.0 127.0
-26.44 12.25 1: 8: 7. ! 29.0 18.0 -46.1 130.2
-30.31 11.71 1: 8:24. ! 25.2 17.8 -43.8 133.6
-34.82 10.89 1: 8:40. ! 20.7 17.9 -41.0 137.3
-40.53 9.45 1: 8:57. ! 14.9 18.5 -37.4 141.8
-50.84 5.15 1: 9:13. ! 4.4 21.4 -30.5 150.4
-------------------------------------------------------------------------
Martin Federspiel ******** E-mail: martin@astro.unibas.ch
Astronomisches Institut ******** oder: federspi@astro.unibas.ch
der Universitaet Basel **** oder: federspielm@ubaclu.unibas.ch
Venusstr. 7 Telefon: (CH)-61/2055413
CH-4102 Binningen (Schweiz) Fax: (CH)-61/2055455
-------------------------------------------------------------------------
Be sure to use the RELOAD button of your browser,
so you will surely use the latest version of predictions page!