Update for (1051) Merope - February 2, 2002
Update computed by Jan Manek; issued 27 Jan 2002 15:30:00 +0100 (CET)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(1051) Merope / TYC 4742-00609-1 on February 2, 2002
visible from N Italy, Austria, Czechia, Poland, W Lithuania,
W Latvia, Estonia, NW Russia
Summary
In the evening of February 2, 2002 a faint 11.0 mag star TYC 4742-00609-1
will be occulted by a 69 km asteroid (1051) Merope. This update is based on
USNO/Flagstaff and OFXB astrometry for the asteroid and UCAC star position.
The updated path shows ~0.3" east shift with time ~1.0 minutes later compared to
Edwin Goffin's nominal prediction.
Updated path runs over Sardinia and Corse ~20:38.1 UT, north Italy ~20:38.6 UT, Austria ~20:38.9 UT,
Czechia ~20:39 UT just east of Prague, Poland ~20:39.4 UT between Poznan and Wroclaw, W Lithuania and
W Latvia ~20:39.7 UT, Estonia ~20:39.8 UT, NW Russia just east of Petersburg ~20:40 UT.
Much larger area is covered taking uncertainty into consideration.
Please check the path chart for details.
Good luck !
The event at one glimpse:
* date and approx. UT time of event: February 2, 2002 @ 20:39 UT (Euro)
* magnitude of target star: 11.0
* magnitude drop [mag]: 4.7
* estimated maximum duration [s]: 6.5
* path description: given above
* Goffin's original chart reference: A02_0244
The occultation path:
* approximate ground width [km]: 70
* uncertainty [path widths]: 3.3
* uncertainty in time [s]: 25
* 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 4742-00609-1
* constellation: Eridanus
* J2000 position [h,m,s; o,',"]: 04h 31m 29.4089s; -05o 30' 28.766"
* position source: UCAC combined with Tycho-2 proper motion
* estimated accuracy ["]: 0.01" (0.010", 0.005")
* V mag [mag]: 10.98
* B-V [mag]: +0.29
* remarks:
Recent UCAC position was provided by Marion and Norbert Zacharias.
Target star is in NE Eridanus, 11 degrees west of 0.3 mag star beta Orionis =
= SAO 131907. Target star is northern one in pair, southern star is ~0.2 mag
fainter, 32" south of target, so this is very fine reference star for visual
observers.
Close finding chart (prepared in GUIDE7):
* occulted star is in center - labeled with cross
* field is 3.0x3.0 degrees
* limiting magnitude is 13.0
* labeled stars have indicated SAO numbers
* remarks: this time two charts are given, second one is more detailed, showing
also clearly the southern star in pair.
More detailed finding chart (prepared in GUIDE7):
* occulted star is in center - labeled with cross
* field is 35'x35'
* limiting magnitude is 15.0
Data for the minor planet:
* general information:
number, name: (1051) Merope
approx. diameter [km]: 69
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone),
OFXB (Yves Revaz and Nicolas Waelchli)
number of used observations: 82 USNO, 1 OFXB
number of rejected observations: 5 USNO, 1 OFXB
time covered by the observations: 1998 04 18 - 2002 01 18
rms residuals ["] (RA,DE): 0.11", 0.11"
estimated positional accuracy at epoch of event ["]: 0.11", 0.11"
remarks: OFXB frame was reduced by Raoul Behrend.
Data for the event:
* UT date and time of least geocentric approach: 20:30.4 UT
* approx. V mag of minor planet at event [mag]: 15.7
* geocentric parallax of minor planet ["]: 3.066
* magnitude drop [mag]: 4.7
* estimated maximum duration [s]: 6.5
* apparent motion of minor planet ["/h]: 18.36
* angular distance to moon, phase of moon [deg,%]: 133, 69%
* remarks:
Calculator(s): Jan Manek
Path coordinates:
Latitude Latitude
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 ' "
4 0 0 31 35 48 20 36 50 49 -42 30 39 4 32 32 5
5 0 0 33 55 28 20 37 10 47 -43 33 1 20 34 49 11
6 0 0 36 4 38 20 37 27 44 -43 35 12 53 36 56 1
7 0 0 38 4 16 20 37 43 42 -44 37 14 42 38 53 32
8 0 0 39 55 17 20 37 57 40 -44 39 7 42 40 42 36
9 0 0 41 38 29 20 38 10 38 -44 40 52 43 42 23 59
10 0 0 43 14 34 20 38 21 37 -44 42 30 29 43 58 25
11 0 0 44 44 11 20 38 31 35 -45 44 1 39 45 26 30
12 0 0 46 7 53 20 38 40 33 -45 45 26 48 46 48 48
13 0 0 47 26 12 20 38 49 32 -45 46 46 26 48 5 48
14 0 0 48 39 35 20 38 56 30 -45 48 1 3 49 17 58
15 0 0 49 48 26 20 39 3 29 -45 49 11 4 50 25 41
16 0 0 50 53 8 20 39 10 28 -45 50 16 50 51 29 20
17 0 0 51 53 60 20 39 15 27 -44 51 18 41 52 29 12
18 0 0 52 51 20 20 39 21 25 -44 52 16 57 53 25 36
19 0 0 53 45 23 20 39 26 24 -44 53 11 54 54 18 47
20 0 0 54 36 25 20 39 30 23 -44 54 3 45 55 8 60
21 0 0 55 24 39 20 39 34 22 -44 54 52 45 55 56 27
22 0 0 56 10 15 20 39 38 21 -44 55 39 6 56 41 21
23 0 0 56 53 27 20 39 41 20 -44 56 22 59 57 23 51
24 0 0 57 34 22 20 39 44 20 -44 57 4 33 58 4 7
25 0 0 58 13 10 20 39 47 19 -43 57 43 58 58 42 18
26 0 0 58 49 59 20 39 50 18 -43 58 21 22 59 18 33
27 0 0 59 24 57 20 39 52 17 -43 58 56 54 59 52 58
28 0 0 59 58 11 20 39 55 16 -43 59 30 39 60 25 41
29 0 0 60 29 47 20 39 57 16 -43 60 2 44 60 56 47
30 0 0 60 59 50 20 39 59 15 -43 60 33 16 61 26 22
31 0 0 61 28 26 20 40 1 14 -42 61 2 19 61 54 32
32 0 0 61 55 40 20 40 2 14 -42 61 29 58 62 21 20
33 0 0 62 21 37 20 40 4 13 -42 61 56 19 62 46 53
34 0 0 62 46 20 20 40 5 12 -42 62 21 26 63 11 13
35 0 0 63 9 54 20 40 7 12 -42 62 45 21 63 34 25
36 0 0 63 32 22 20 40 8 11 -42 63 8 10 63 56 32
37 0 0 63 53 47 20 40 9 11 -41 63 29 55 64 17 38
38 0 0 64 14 13 20 40 10 10 -41 63 50 40 64 37 45
39 0 0 64 33 42 20 40 11 10 -41 64 10 27 64 56 56
40 0 0 64 52 17 20 40 12 9 -41 64 29 20 65 15 14
41 0 0 65 10 1 20 40 13 8 -41 64 47 20 65 32 41
42 0 0 65 26 55 20 40 13 8 -41 65 4 30 65 49 20
43 0 0 65 43 3 20 40 14 7 -40 65 20 52 66 5 12
44 0 0 65 58 25 20 40 15 7 -40 65 36 29 66 20 20
45 0 0 66 13 4 20 40 15 7 -40 65 51 21 66 34 46
46 0 0 66 27 2 20 40 16 6 -40 66 5 32 66 48 31
47 0 0 66 40 20 20 40 16 6 -40 66 19 2 67 1 36
48 0 0 66 52 59 20 40 17 5 -40 66 31 53 67 14 4
49 0 0 67 5 1 20 40 17 5 -40 66 44 6 67 25 55
50 0 0 67 16 28 20 40 18 4 -39 66 55 44 67 37 12
51 0 0 67 27 21 20 40 18 4 -39 67 6 46 67 47 54
52 0 0 67 37 40 20 40 18 3 -39 67 17 15 67 58 4
53 0 0 67 47 27 20 40 18 3 -39 67 27 11 68 7 42
54 0 0 67 56 43 20 40 19 3 -39 67 36 36 68 16 50
........................... 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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