Update for (300) Geraldina - December 1/2, 2000
Update computed by Jan Manek; issued 28 Nov 2000 16:27:20 +0100 (CET)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(300) Geraldina / TAC +20 00709 on December 1/2, 2000
visible from S Russia, N Ukraine/S Belarus, Poland, N Germany,
Netherlands, S England and N Florida (USA)
Summary
In the night of December 1/2, 2000 a faint 11.5 mag star TYC 1256-00931-1 =
TAC +20 00709 will be occulted by a 79 km asteroid (300) Geraldina. This
update is based on USNO/Flagstaff, TMO and Gnosca astrometry for the asteroid and Tycho-2 star position.
The updated path shows ~4 path width north shift and time ~0.8 minutes earlier compared to
Edwin Goffin's nominal prediction.
The path of this occultation runs over S Russia ~0:10.5 UT, N Ukraine
~0:11 UT, S Belarus ~0:11.5 UT, Poland ~0:12 UT, N Germany ~0:13 UT,
Netherlands ~0:13.4 UT, S England with London ~0:13.9 UT in Europe.
After crossing Atlantic ocean path runs over N Florida ~0:22 UT.
Within expected errors are other countries, check the maps please.
There is large 4 path width uncertainty, so extra travel to the occultation path
isn't recommended, also as the event is very short and star rather faint. However observers
within uncertainty limits should give a try from their permanent sites.
Good weather and good luck !
The event at one glimpse:
* date and approx. UT time of event: December 2, 2000 @ 00:12 UT (Euro)
00:22 UT (USA)
* magnitude of target star: 11.5
* magnitude drop [mag]: 2.6
* estimated maximum duration [s]: 6.3
* path description: given above
* Goffin's original chart reference: A00_1220
The occultation path:
* approximate ground width [km]: 95
* uncertainty [path widths]: 4
* uncertainty in time [s]: 30
* map: below
* remarks: Path uncertainities are given according to nominal star
position errors and expected asteroid positional accuracy.
!!!!!!!
Circles along path indicates the centerline for this event.
They are more accurate than the path limit lines.
!!!!!!!
Data for the target star:
* name: TAC +20 00709 = TYC 1256-00931-1
* constellation: Taurus
* J2000 position [h,m,s; o,',"]: 03h 51m 53.352s; +20o 34' 05.32"
* position source: Tycho-2
* estimated accuracy ["]: 0.12" (0.07", 0.09")
* V mag [mag]: 11.45
* B-V [mag]: +0.36
* remarks:
Target star is in western Taurus, ~3.8 degrees SSE of open cluster M45,
~4.6 degrees NE of Saturn or 5.5 degrees west of Jupiter. Only 1.1'
north of target is ~12.4 mag star.
Close finding chart (prepared in GUIDE7):
* occulted star is in center - labeled with cross
* field is 3.0x3.0 degrees
* limiting magnitude is 12.5
* labeled stars have indicated SAO numbers
Data for the minor planet:
* general information:
number, name: (300) Geraldina
approx. diameter [km]: 79
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen),
Gnosca (Stefano Sposetti)
number of used observations: 73 USNO, 3 TMO, 7(1) Gnosca
number of rejected observations: 7 USNO
time covered by the observations: 1998 04 19 - 2000 11 25
rms residuals ["] (RA,DE): 0.11", 0.09"
estimated positional accuracy at epoch of event ["]: 0.11"
remarks: Gnosca frames of Stefano Sposetti were reduced by Raoul
Behrend; mean of the 7 original positions was used in computation.
Data for the event:
* UT date and time of least geocentric approach: 00:16.1 UT
* approx. V mag of minor planet at event [mag]: 14.0
* geocentric parallax of minor planet ["]: 4.154
* magnitude drop [mag]: 2.6
* estimated maximum duration [s]: 6.3
* apparent motion of minor planet ["/h]: 29.24
* angular distance to moon, phase of moon [deg,%]: 104, 29%
* remarks:
Calculator(s): Jan Manek
Path coordinates:
Altitude
E. Longitude Latitude U.T. star sun
........ shortened ..........................
o ' " o ' " h m s o o
72 0 0 43 34 0 0 9 0 16 -24
70 0 0 44 9 5 0 9 5 17 -26
68 0 0 44 42 51 0 9 9 19 -27
66 0 0 45 15 19 0 9 14 20 -29
64 0 0 45 46 29 0 9 20 22 -30
62 0 0 46 16 20 0 9 26 23 -31
60 0 0 46 44 53 0 9 31 25 -33
58 0 0 47 12 7 0 9 38 26 -34
56 0 0 47 38 4 0 9 44 27 -35
54 0 0 48 2 44 0 9 51 29 -37
52 0 0 48 26 7 0 9 57 30 -38
50 0 0 48 48 14 0 10 5 31 -39
48 0 0 49 9 6 0 10 12 32 -40
46 0 0 49 28 42 0 10 19 34 -41
44 0 0 49 47 5 0 10 27 35 -43
42 0 0 50 4 13 0 10 34 36 -44
40 0 0 50 20 9 0 10 42 37 -45
38 0 0 50 34 52 0 10 50 38 -46
36 0 0 50 48 24 0 10 58 40 -47
34 0 0 51 0 44 0 11 6 41 -48
32 0 0 51 11 54 0 11 15 42 -49
30 0 0 51 21 54 0 11 23 43 -50
28 0 0 51 30 44 0 11 32 44 -51
26 0 0 51 38 26 0 11 41 45 -52
24 0 0 51 44 58 0 11 50 46 -52
22 0 0 51 50 22 0 11 59 47 -53
20 0 0 51 54 38 0 12 8 48 -54
18 0 0 51 57 46 0 12 17 49 -55
16 0 0 51 59 47 0 12 26 50 -56
14 0 0 52 0 40 0 12 36 51 -56
12 0 0 52 0 26 0 12 45 52 -57
10 0 0 51 59 4 0 12 55 52 -58
8 0 0 51 56 36 0 13 5 53 -58
6 0 0 51 52 59 0 13 15 54 -59
4 0 0 51 48 16 0 13 25 55 -59
2 0 0 51 42 24 0 13 35 56 -60
0 0 0 51 35 25 0 13 45 56 -60
- 2 0 0 51 27 17 0 13 56 57 -60
- 4 0 0 51 18 1 0 14 6 58 -61
- 6 0 0 51 7 37 0 14 17 58 -61
- 8 0 0 50 56 3 0 14 28 59 -61
- 10 0 0 50 43 19 0 14 39 59 -61
- 12 0 0 50 29 25 0 14 50 60 -61
- 14 0 0 50 14 21 0 15 1 60 -61
........ shortened ..........................
- 66 0 0 36 37 36 0 20 28 46 -38
- 68 0 0 35 50 53 0 20 41 44 -36
- 70 0 0 35 3 17 0 20 53 43 -35
- 72 0 0 34 14 54 0 21 6 41 -33
- 74 0 0 33 25 46 0 21 17 39 -31
- 76 0 0 32 35 57 0 21 29 38 -30
- 78 0 0 31 45 32 0 21 40 36 -28
- 80 0 0 30 54 35 0 21 51 34 -26
- 82 0 0 30 3 10 0 22 2 33 -24
- 84 0 0 29 11 23 0 22 12 31 -22
- 86 0 0 28 19 18 0 22 22 29 -20
- 88 0 0 27 27 0 0 22 31 27 -19
- 90 0 0 26 34 36 0 22 40 25 -17
- 92 0 0 25 42 9 0 22 48 23 -15
- 94 0 0 24 49 46 0 22 56 21 -13
- 96 0 0 23 57 33 0 23 3 19 -11
- 98 0 0 23 5 34 0 23 10 18 -9
........ shortened ..........................
----------------------------------------------------------------------------
Jan Manek
Stefanik Observatory Private :
Petrin 205 Werichova 950
118 46 Praha 1 152 00 Praha 5 - Barrandov |_|_|
Czech Republic Czech Republic / \
Internet : jan.manek@worldonline.cz |-O-O-|
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