Update for (233) Asterope - October 28/29, 2002
Update computed by Jan Manek; issued 20 Oct 2002 21:30:00 +0200 (CEST)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(233) Asterope / TYC 1319-00673-1 on October 28/29, 2002
visible from Finland, Baltic states, Poland, E Czechia, Slovakia,
Hungary, frm. Yugoslavia, S Italy and Libya
Summary
In the night of October 28/29, 2002 an 11.9 mag star TYC 1319-00673-1
will be occulted by a 108 km asteroid (233) Asterope. This update is based on
USNO/Flagstaff and TMO astrometry for the asteroid and recent UCAC star position.
The updated path shows ~2 path width east shift with time ~3.7 minutes later compared to
Edwin Goffin's nominal prediction.
Updated path runs from north to south over Finland with Helsinki around 4:29 UT,
Estonia ~4:30 UT, Latvia ~4:31 UT, Lithuania ~4:31.5 UT, Poland around 4:33 UT with
Warszaw and Krakow on east limit and Lodz in path, E tip of Czechia and west Slovakia ~4:34 UT,
Hungary ~4:35 UT with Budapest on east limit, frm. Yugoslavia around 4:36 UT, S Italy ~4:38 UT
and Libya ~4:42 UT. Observers within declared uncertainty area should try to observe to catch the
main body event. Keep in mind that Asterope has a satellite so observers in wider range can try
their chances; the secondary event can last ~1.5 seconds. Crossed out 22.10.2002 - not true. Observations will be complicated by
morning 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: October 29, 2002 @ 04:34 UT (Central Europe)
* magnitude of target star: 11.9
* magnitude drop [mag]: 1.3
* estimated maximum duration [s]: 26.3
* path description: given above
* Goffin's original chart reference: A02_1029
The occultation path:
* approximate ground width [km]: 120
* uncertainty [path widths]: 1.1
* uncertainty in time [s]: 21
* 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 1319-00673-1
* constellation: Gemini
* J2000 position [h,m,s; o,',"]: 06h 21m 12.7095s; +17o 40' 48.814"
* position source: recent UCAC position combined with Tycho-2 proper motion
* estimated accuracy ["]: 0.02" (0.01", 0.01")
* V mag [mag]: 11.90
* B-V [mag]: +0.55
* remarks:
Recent UCAC position was provided by Marion and Norbert Zacharias.
Target star is in southwest Gemini, about 4 degrees northwest of 2.0 mag star gamma Geminorum = SAO 95912.
Very close to border with Orion.
!!! 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: (233) Asterope
approx. diameter [km]: 108
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 110 USNO, 28 TMO
number of rejected observations: 9 USNO, 2 TMO
time covered by the observations: 1993 11 17 - 2002 10 09
rms residuals ["] (RA,DE): 0.08", 0.06"
estimated positional accuracy at epoch of event ["]: 0.07", 0.05"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 04:45.7 UT
* approx. V mag of minor planet at event [mag]: 12.8
* geocentric parallax of minor planet ["]: 4.430
* magnitude drop [mag]: 1.3
* estimated maximum duration [s]: 26.3
* apparent motion of minor planet ["/h]: 10.26
* angular distance to moon, phase of moon [deg,%]: 32, 50%
* remarks:
Elements for WinOccult:
============ cut here ===========================================
2002 Oct 29
233 Asterope
4h 45.7m UT
19-00673-1 11.9 6 21 12.710 17 40 48.81TYC 1319-00673-1
12.8 108 26.3 1.985 0.171 -9.96
-13.463 17.683 104.53 -13.39
4.7609 .42797 .10590 0.55484 -2.24712 -0.00498 0.00047
2000 76.282107920021023.00000124.865675222.3033627.664970 0.099802962.660084952.394600618.215 0.15
RATE 2.2717514 .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
43 0 0 71 45 48 4 25 60 28 -6 72 32 22 70 58 52
42 0 0 71 25 16 4 26 6 29 -6 72 12 49 70 37 22
41 0 0 71 3 32 4 26 13 29 -6 71 52 7 70 14 35
40 0 0 70 40 30 4 26 21 30 -6 71 30 11 69 50 25
39 0 0 70 16 4 4 26 29 30 -6 71 6 55 69 24 46
38 0 0 69 50 5 4 26 37 31 -6 70 42 12 68 57 31
37 0 0 69 22 28 4 26 46 31 -6 70 15 55 68 28 31
36 0 0 68 53 2 4 26 55 32 -7 69 47 56 67 57 36
35 0 0 68 21 38 4 27 6 32 -7 69 18 5 67 24 35
34 0 0 67 48 3 4 27 16 33 -7 68 46 12 66 49 17
33 0 0 67 12 6 4 27 28 34 -7 68 12 4 66 11 27
32 0 0 66 33 31 4 27 41 34 -7 67 35 28 65 30 49
31 0 0 65 52 0 4 27 54 35 -7 66 56 7 64 47 4
30 0 0 65 7 14 4 28 9 36 -7 66 13 43 63 59 50
29 0 0 64 18 48 4 28 25 37 -8 65 27 53 63 8 43
28 0 0 63 26 15 4 28 43 38 -8 64 38 13 62 13 10
27 0 0 62 29 2 4 29 2 39 -8 63 44 12 61 12 36
26 0 0 61 26 29 4 29 24 40 -8 62 45 13 60 6 17
25 0 0 60 17 46 4 29 48 41 -8 61 40 33 58 53 18
24 0 0 59 1 53 4 30 15 42 -9 60 29 16 57 32 32
23 0 0 57 37 36 4 30 45 43 -9 59 10 17 56 2 34
22 0 0 56 3 16 4 31 20 45 -9 57 42 10 54 21 33
21 0 0 54 16 47 4 31 59 46 -9 56 3 3 52 26 60
Longitude Longitude
20 51 13 54 0 0 4 32 6 47 -9 19 54 48 21 48 6
20 21 8 53 0 0 4 32 28 47 -9 19 26 14 21 16 29
19 53 2 52 0 0 4 32 51 48 -9 18 59 32 20 46 58
19 26 45 51 0 0 4 33 15 49 -9 18 34 34 20 19 21
19 2 9 50 0 0 4 33 38 50 -9 18 11 11 19 53 29
18 39 5 49 0 0 4 34 2 51 -9 17 49 16 19 29 16
18 17 27 48 0 0 4 34 26 52 -9 17 28 42 19 6 32
17 57 9 47 0 0 4 34 50 52 -9 17 9 25 18 45 13
17 38 6 46 0 0 4 35 14 53 -9 16 51 18 18 25 12
17 20 12 45 0 0 4 35 39 54 -9 16 34 18 18 6 24
17 3 24 44 0 0 4 36 3 55 -9 16 18 21 17 48 44
16 47 37 43 0 0 4 36 28 55 -9 16 3 21 17 32 9
16 32 48 42 0 0 4 36 53 56 -9 15 49 17 17 16 35
16 18 54 41 0 0 4 37 19 57 -9 15 36 5 17 1 57
16 5 51 40 0 0 4 37 44 57 -9 15 23 42 16 48 14
15 53 37 39 0 0 4 38 10 58 -9 15 12 6 16 35 22
15 42 10 38 0 0 4 38 35 59 -9 15 1 15 16 23 19
15 31 28 37 0 0 4 39 1 59 -8 14 51 6 16 12 2
15 21 28 36 0 0 4 39 27 60 -8 14 41 38 16 1 30
15 12 9 35 0 0 4 39 53 60 -8 14 32 50 15 51 41
15 3 29 34 0 0 4 40 19 61 -8 14 24 38 15 42 32
14 55 27 33 0 0 4 40 46 61 -8 14 17 3 15 34 3
........................... 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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