Update for (126) Velleda - January 6/7, 2003
Update computed by Jan Manek; issued 26 Dec 2002 21:53 +0100 (CET)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(126) Velleda / TYC 1902-01783-1 on January 6/7, 2003
visible from Siberia, N Russia, Latvia, Lithuania, Poland,
Czechia, S Germany, NW Switzerland and S France
Summary
In the night of January 6/7, 2003 a bright 9.2 mag star TYC 1902-01783-1
will be occulted by a 47 km asteroid (126) Velleda. This update is based on
USNO/Flagstaff and TMO astrometry for the asteroid and recent UCAC star position.
The updated path shows ~5 path width south shift with time 0.8 minutes later compared to
Edwin Goffin's nominal prediction.
Updated path runs over Siberia 16:33->16:40 UT, N Russia 16:40->16:42 UT, SE Latvia ~16:42.3 UT,
Lithuania ~16:42.4 UT, Poland ~16:42.7 UT, W Czechia ~16:43 UT, S Germany ~16:43.3 UT, NW Switzerland ~16:43.5 UT
and S France ~16:43.6 UT at low altitudes and strong evening twilight.
Please check the path chart for details.
Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: January 6, 2003 @ 16:43 UT (Europe)
* magnitude of target star: 9.2
* magnitude drop [mag]: 3.4
* estimated maximum duration [s]: 4.0
* path description: given above
* Goffin's original chart reference: A03_0114
The occultation path:
* approximate ground width [km]: 65
* uncertainty [path widths]: 2.1
* uncertainty in time [s]: 7
* map: below
* remarks: Path uncertainties are given according to nominal star
position errors and expected asteroid positional accuracy.
Data for the target star:
* name: TYC 1902-01783-1
* constellation: Gemini
* J2000 position [h,m,s; o,',"]: 06h 55m 14.5865s; +27o 34' 32.542"
* position source: recent UCAC position combined with Tycho-2 proper motion
* estimated accuracy ["]: 0.06" (0.01", 0.05")
* V mag [mag]: 9.22
* B-V [mag]: +1.17
* remarks:
Recent UCAC position was provided by Marion and Norbert Zacharias.
Target star is in middle Geminorum, about 3.5 degrees NE of 3.0 mag star epsilon Geminorum = SAO 78682.
!!! IMPORTANT !!!
Purple stars in identification chart are so called 'non-star' objects in GSC; in dense fields
the 'non-stars' are often real stars or blends of close pairs. Be careful about this.
Close finding chart (prepared in GUIDE7):
* occulted star is in center - labeled with cross
* field is 2.0x2.0 degrees
* limiting magnitude is 12.5
* labeled stars have indicated SAO numbers
* remarks:
Data for the minor planet:
* general information:
number, name: (126) Velleda
approx. diameter [km]: 47
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 121 USNO, 27 TMO
number of rejected observations: 14 USNO, 3 TMO
time covered by the observations: 1997 05 11 - 2002 12 19
rms residuals ["] (RA,DE): 0.07", 0.07"
estimated positional accuracy at epoch of event ["]: 0.06", 0.06"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 16:36.7 UT
* approx. V mag of minor planet at event [mag]: 12.5
* geocentric parallax of minor planet ["]: 5.733
* magnitude drop [mag]: 3.4
* estimated maximum duration [s]: 4.0
* apparent motion of minor planet ["/h]: 38.16
* angular distance to moon, phase of moon [deg,%]: 129, 16%
* remarks:
Elements for WinOccult:
============ cut here ===========================================
2003 Jan 06
126 Velleda
16h 36.7m UT
02-01783-1 9.2 6 55 14.587 27 34 32.54TYC 1902-01783-1
12.5 47 4.0 1.534 -2.857 3.57
-251.215 27.576 -67.72 -22.49
16.6119 .05953 .63359 -6.62956 0.62377 0.00035 -0.00052
2000 99.86213012003 1 1.00000327.42558823.533637 2.923183 0.104837052.439558542.183802419.275 0.15
RATE 2.5866469 .0000000 .0000000 .0000000 .00000000 .00000000 .00000000
============ cut here ===========================================
Calculator(s): Jan Manek
Path coordinates:
Center Altitude Path Limits
E. Longitude Latitude U.T. star sun Limit 1 Limit 2
........................... shortened .............................
o ' " o ' " h m s o o o ' " o ' "
Latitude Latitude
54 0 0 63 54 60 16 40 29 40 -34 64 13 1 63 37 4
53 0 0 63 43 2 16 40 32 40 -34 64 1 8 63 25 2
52 0 0 63 30 44 16 40 36 39 -33 63 48 53 63 12 40
51 0 0 63 18 4 16 40 40 39 -33 63 36 18 62 59 56
50 0 0 63 5 2 16 40 44 39 -33 63 23 20 62 46 50
49 0 0 62 51 38 16 40 48 38 -32 63 10 0 62 33 22
48 0 0 62 37 52 16 40 51 38 -32 62 56 18 62 19 31
47 0 0 62 23 43 16 40 55 38 -32 62 42 13 62 5 18
46 0 0 62 9 10 16 40 59 37 -31 62 27 45 61 50 41
45 0 0 61 54 15 16 41 3 37 -31 62 12 54 61 35 41
44 0 0 61 38 56 16 41 7 36 -30 61 57 39 61 20 18
43 0 0 61 23 12 16 41 11 36 -30 61 42 0 61 4 31
42 0 0 61 7 5 16 41 15 35 -30 61 25 57 60 48 19
41 0 0 60 50 33 16 41 19 35 -29 61 9 30 60 31 43
40 0 0 60 33 37 16 41 23 35 -29 60 52 37 60 14 42
39 0 0 60 16 15 16 41 27 34 -28 60 35 20 59 57 16
38 0 0 59 58 28 16 41 31 34 -28 60 17 37 59 39 25
37 0 0 59 40 15 16 41 34 33 -27 59 59 29 59 21 8
36 0 0 59 21 37 16 41 38 33 -27 59 40 55 59 2 25
35 0 0 59 2 32 16 41 42 32 -26 59 21 55 58 43 16
34 0 0 58 43 2 16 41 46 32 -26 59 2 28 58 23 42
33 0 0 58 23 4 16 41 50 31 -25 58 42 35 58 3 40
32 0 0 58 2 41 16 41 54 31 -25 58 22 15 57 43 12
31 0 0 57 41 50 16 41 58 30 -24 58 1 29 57 22 18
30 0 0 57 20 32 16 42 2 29 -24 57 40 15 57 0 56
29 0 0 56 58 48 16 42 6 29 -23 57 18 34 56 39 8
28 0 0 56 36 36 16 42 10 28 -22 56 56 26 56 16 52
27 0 0 56 13 57 16 42 14 28 -22 56 33 51 55 54 9
26 0 0 55 50 50 16 42 17 27 -21 56 10 48 55 30 59
25 0 0 55 27 16 16 42 21 26 -21 55 47 18 55 7 22
24 0 0 55 3 15 16 42 25 26 -20 55 23 20 54 43 18
23 0 0 54 38 47 16 42 29 25 -19 54 58 55 54 18 46
22 0 0 54 13 51 16 42 32 25 -19 54 34 2 53 53 48
21 0 0 53 48 29 16 42 36 24 -18 54 8 43 53 28 22
20 0 0 53 22 39 16 42 39 23 -17 53 42 56 53 2 30
19 0 0 52 56 23 16 42 43 23 -17 53 16 42 52 36 11
18 0 0 52 29 40 16 42 46 22 -16 52 50 2 52 9 25
17 0 0 52 2 30 16 42 50 21 -15 52 22 55 51 42 14
16 0 0 51 34 55 16 42 53 20 -15 51 55 22 51 14 36
15 0 0 51 6 54 16 42 56 20 -14 51 27 23 50 46 33
14 0 0 50 38 28 16 42 60 19 -13 50 58 58 50 18 5
13 0 0 50 9 37 16 43 3 18 -12 50 30 9 49 49 12
12 0 0 49 40 21 16 43 6 17 -12 50 0 55 49 19 55
11 0 0 49 10 42 16 43 9 17 -11 49 31 17 48 50 15
10 0 0 48 40 39 16 43 12 16 -10 49 1 15 48 20 11
9 0 0 48 10 14 16 43 14 15 -9 48 30 50 47 49 44
8 0 0 47 39 26 16 43 17 14 -8 48 0 3 47 18 56
7 0 0 47 8 17 16 43 19 13 -8 47 28 55 46 47 47
6 0 0 46 36 47 16 43 22 13 -7 46 57 26 46 16 17
5 0 0 46 4 58 16 43 24 12 -6 46 25 36 45 44 27
4 0 0 45 32 49 16 43 26 11 -5 45 53 27 45 12 18
3 0 0 45 0 22 16 43 28 10 -4 45 21 0 44 39 52
2 0 0 44 27 38 16 43 30 9 -3 44 48 16 44 7 8
1 0 0 43 54 38 16 43 32 8 -2 44 15 14 43 34 8
........................... 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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