Update for (253) Mathilde - February 2/3, 2003
Update computed by Jan Manek; issued 26 Jan 2003 19:59 +0100 (CET)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(253) Mathilde / TYC 0786-00475-1 on February 2/3, 2003
visible from S Russia, NE Ukraine, Belarus, Lithuania, W Latvia
S Sweden and S Norway
Summary
In the night of February 2/3, 2003 a faint 11.6 mag star TYC 0786-00475-1
will be occulted by a 61 km asteroid (253) Mathilde. This update is based on
USNO/Flagstaff, TMO and Geneva astrometry for the asteroid and recent UCAC star position.
The updated path shows ~1 path width south shift with time 0.5 minutes later compared to
Edwin Goffin's nominal prediction.
Updated path runs over S Russia ~0:54.4 UT, NE Ukraine ~0:55.0 UT with Kharkov in path,
Belarus ~0:55.7 UT with Minsk in path, Lithuania ~0:56.0 UT, W Latvia ~0:56.3 UT, S Sweden ~ 0:56.7 UT with
Stockholm in path and S Norway ~0:57.3 UT.
Please check the path chart for details.
Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: February 3, 2003 @ 00:55 UT (Europe)
* magnitude of target star: 11.6
* magnitude drop [mag]: 3.4
* estimated maximum duration [s]: 4.4
* path description: given above
* Goffin's original chart reference: A03_0218
The occultation path:
* approximate ground width [km]: 120
* uncertainty [path widths]: 2.1
* uncertainty in time [s]: 9
* 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 0786-00475-1
* constellation: Canis Minor
* J2000 position [h,m,s; o,',"]: 07h 43m 30.0538s; +12o 57' 50.733"
* position source: recent UCAC position combined with Tycho-2 proper motion
* estimated accuracy ["]: 0.03" (0.02", 0.02")
* V mag [mag]: 11.62
* B-V [mag]: +0.58
* remarks:
Target star is in north Canis Minor, about 6.2 degrees NE of 2.9 mag star beta Canis Minorum = SAO 115465.
There is ~13-mag star 17" east of target and ~14-mag star 17" SW of target star.
!!! 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 13.0
* labeled stars have indicated SAO numbers
* remarks:
Data for the minor planet:
* general information:
number, name: (253) Mathilde
approx. diameter [km]: 61
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), Geneva (Raoul Behrend), TMO (Bill Owen)
number of used observations: 99 USNO, 4 Geneva, 17 TMO
number of rejected observations: 13 USNO, 2 Geneva, 2 TMO
time covered by the observations: 1997 05 31 - 2003 01 24
rms residuals ["] (RA,DE): 0.10", 0.10"
estimated positional accuracy at epoch of event ["]: 0.07", 0.07"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 00:57.5 UT
* approx. V mag of minor planet at event [mag]: 14.9
* geocentric parallax of minor planet ["]: 4.003
* magnitude drop [mag]: 3.4
* estimated maximum duration [s]: 4.4
* apparent motion of minor planet ["/h]: 31.34
* angular distance to moon, phase of moon [deg,%]: 140, 3%
* remarks:
Elements for WinOccult:
============ cut here ===========================================
2003 Feb 03
253 Mathilde
0h 57.5m UT
86-00475-1 11.6 7 43 30.054 12 57 50.73TYC 0786-00475-1
14.9 61 4.4 2.197 -2.026 10.19
-31.307 12.962 169.06 -16.69
0.9586 .27355 .79495 -7.40252 2.54548 0.00202 0.00048
2000 122.9382312003 131.00000156.669160179.7715706.709866 0.264860802.649584421.9478133810.25 0.15
RATE 2.2852690 .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
59 0 0 40 28 42 0 53 34 9 -27 41 2 10 39 55 46
58 0 0 40 48 55 0 53 36 10 -27 41 22 34 40 15 50
57 0 0 41 9 39 0 53 38 10 -28 41 43 27 40 36 24
56 0 0 41 30 52 0 53 40 11 -29 42 4 50 40 57 27
55 0 0 41 52 33 0 53 43 12 -30 42 26 42 41 18 58
54 0 0 42 14 42 0 53 45 13 -30 42 49 2 41 40 57
53 0 0 42 37 19 0 53 48 14 -31 43 11 50 42 3 23
52 0 0 43 0 22 0 53 51 14 -32 43 35 5 42 26 16
51 0 0 43 23 52 0 53 54 15 -32 43 58 46 42 49 35
50 0 0 43 47 47 0 53 57 16 -33 44 22 54 43 13 19
49 0 0 44 12 7 0 54 1 17 -34 44 47 26 43 37 27
48 0 0 44 36 52 0 54 4 17 -34 45 12 23 44 1 60
47 0 0 45 1 59 0 54 8 18 -35 45 37 43 44 26 55
46 0 0 45 27 30 0 54 12 19 -35 46 3 27 44 52 13
45 0 0 45 53 22 0 54 16 19 -36 46 29 32 45 17 53
44 0 0 46 19 36 0 54 20 20 -37 46 55 59 45 43 54
43 0 0 46 46 9 0 54 24 21 -37 47 22 47 46 10 15
42 0 0 47 13 3 0 54 28 21 -38 47 49 54 46 36 55
41 0 0 47 40 15 0 54 33 22 -38 48 17 20 47 3 54
40 0 0 48 7 44 0 54 37 23 -39 48 45 4 47 31 10
39 0 0 48 35 31 0 54 42 23 -39 49 13 5 47 58 43
38 0 0 49 3 33 0 54 47 24 -39 49 41 22 48 26 32
37 0 0 49 31 50 0 54 52 24 -40 50 9 54 48 54 35
36 0 0 50 0 22 0 54 57 25 -40 50 38 40 49 22 52
35 0 0 50 29 6 0 55 2 25 -41 51 7 39 49 51 22
34 0 0 50 58 1 0 55 7 26 -41 51 36 50 50 20 4
33 0 0 51 27 8 0 55 12 26 -41 52 6 11 50 48 57
32 0 0 51 56 24 0 55 17 27 -41 52 35 43 51 17 59
31 0 0 52 25 49 0 55 22 27 -42 53 5 23 51 47 10
30 0 0 52 55 21 0 55 28 28 -42 53 35 10 52 16 28
29 0 0 53 24 60 0 55 33 28 -42 54 5 4 52 45 52
28 0 0 53 54 44 0 55 38 29 -42 54 35 3 53 15 22
27 0 0 54 24 31 0 55 44 29 -43 55 5 5 53 44 56
26 0 0 54 54 22 0 55 49 29 -43 55 35 11 54 14 33
25 0 0 55 24 14 0 55 55 30 -43 56 5 18 54 44 11
24 0 0 55 54 6 0 56 0 30 -43 56 35 24 55 13 50
23 0 0 56 23 58 0 56 6 30 -43 57 5 30 55 43 28
22 0 0 56 53 47 0 56 12 31 -43 57 35 34 56 13 5
21 0 0 57 23 34 0 56 17 31 -43 58 5 34 56 42 38
20 0 0 57 53 15 0 56 23 31 -43 58 35 29 57 12 8
19 0 0 58 22 51 0 56 28 31 -43 59 5 17 57 41 31
18 0 0 58 52 20 0 56 34 31 -43 59 34 59 58 10 49
17 0 0 59 21 40 0 56 39 32 -43 60 4 32 58 39 58
16 0 0 59 50 52 0 56 45 32 -43 60 33 54 59 8 58
15 0 0 60 19 52 0 56 50 32 -43 61 3 6 59 37 49
14 0 0 60 48 41 0 56 56 32 -42 61 32 5 60 6 28
13 0 0 61 17 17 0 57 1 32 -42 62 0 51 60 34 54
12 0 0 61 45 38 0 57 6 32 -42 62 29 22 61 3 7
11 0 0 62 13 45 0 57 11 32 -42 62 57 38 61 31 6
10 0 0 62 41 35 0 57 17 32 -42 63 25 36 61 58 49
9 0 0 63 9 8 0 57 22 32 -42 63 53 16 62 26 16
8 0 0 63 36 23 0 57 27 32 -41 64 20 38 62 53 25
7 0 0 64 3 19 0 57 32 32 -41 64 47 39 63 20 15
........................... 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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