Update for (1112) Polonia - October 23/24, 2002
Update computed by Jan Manek; issued 16 Oct 2002 23:45:00 +0200 (CEST)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(1112) Polonia / TYC 1183-00030-1 on October 23/24, 2002
visible from Russia, S Belarus, N Ukraine, SE Poland, E Czechia, NW Austria,
SE Germany, Switzerland, S France, NW Spain and N Portugal
Summary
In the night of October 23/24, 2002 a 10.7 mag star TYC 1183-00030-1
will be occulted by a 40 km asteroid (1112) Polonia. This update is based on
USNO/Flagstaff and TMO astrometry for the asteroid and recent UCAC star position.
The updated path shows ~1 path width south shift with time ~0.9 minutes later compared to
Edwin Goffin's nominal prediction.
Updated path runs over Russia around 22:44-22:45 UT with Voronezh on north limit,
S Belarus and N Ukraine around 22:46 UT, SE Poland ~22:46.5 UT with Krakow on north limit,
E Czechia ~22:47 UT, NW Austria and SE Germany around 22:47.5 UT (Munich is close to north limit),
Switzerland ~22:48 UT, S France around 22:49 UT, NW Spain and N Portugal around 22:50 UT.
Observers within this uncertainty area should try to observe.
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 23, 2002 @ 22:47 UT (Central Europe)
* magnitude of target star: 10.7
* magnitude drop [mag]: 3.4
* estimated maximum duration [s]: 4.1
* path description: given above
* Goffin's original chart reference: A02_1054
The occultation path:
* approximate ground width [km]: 45
* uncertainty [path widths]: 3.6
* uncertainty in time [s]: 11
* 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 1183-00030-1
* constellation: Pisces
* J2000 position [h,m,s; o,',"]: 00h 26m 10.4190s; +17o 33' 13.752"
* position source: recent UCAC position combined with Tycho-2 proper motion
* estimated accuracy ["]: 0.04" (0.02", 0.03")
* V mag [mag]: 10.66
* B-V [mag]: +0.36
* remarks:
Recent UCAC position was provided by Marion and Norbert Zacharias.
Target star is in northwest Pisces, about 3.9 degrees northeast of 2.8 mag star gamma Pegasi = SAO 91781.
!!! 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 3.0x3.0 degrees
* limiting magnitude is 13.0
* labeled stars have indicated SAO numbers
* remarks:
Data for the minor planet:
* general information:
number, name: (1112) Polonia
approx. diameter [km]: 40
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 71 USNO, 6 TMO
number of rejected observations: 10 USNO
time covered by the observations: 1998 11 25 - 2002 10 05
rms residuals ["] (RA,DE): 0.11", 0.13"
estimated positional accuracy at epoch of event ["]: 0.06", 0.08"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 22:52.5 UT
* approx. V mag of minor planet at event [mag]: 14.0
* geocentric parallax of minor planet ["]: 4.966
* magnitude drop [mag]: 3.4
* estimated maximum duration [s]: 4.1
* apparent motion of minor planet ["/h]: 27.22
* angular distance to moon, phase of moon [deg,%]: 48, 94%
* remarks:
Elements for WinOccult:
============ cut here ===========================================
2002 Oct 23
1112 Polonia
22h 52.5m UT
83-00030-1 10.7 0 26 10.419 17 33 13.75TYC 1183-00030-1
14.0 40 4.1 1.771 -1.653 -13.46
-8.762 17.558 192.95 -11.60
22.8749 -.16541 .29053 -4.76503 -2.71133 0.00207 -0.00049
2000 353.44366820021023.0000083.997879 303.3727879.009215 0.100586353.021470422.7175517310.05 0.15
RATE 1.8766210 .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 ' "
Longitude Longitude
94 0 0 49 5 43 22 42 17 7 -16 49 18 0 48 53 28
92 0 0 49 35 44 22 42 19 8 -18 49 47 56 49 23 33
90 0 0 50 3 52 22 42 22 9 -19 50 15 59 49 51 45
88 0 0 50 30 8 22 42 25 11 -20 50 42 11 50 18 7
86 0 0 50 54 37 22 42 28 12 -21 51 6 36 50 42 39
84 0 0 51 17 20 22 42 31 13 -22 51 29 15 51 5 26
82 0 0 51 38 20 22 42 35 15 -24 51 50 11 51 26 30
80 0 0 51 57 38 22 42 39 16 -25 52 9 26 51 45 52
78 0 0 52 15 18 22 42 44 17 -26 52 27 2 52 3 35
76 0 0 52 31 21 22 42 48 18 -27 52 43 2 52 19 40
74 0 0 52 45 48 22 42 53 20 -28 52 57 27 52 34 10
72 0 0 52 58 42 22 42 58 21 -29 53 10 18 52 47 6
70 0 0 53 10 3 22 43 4 22 -30 53 21 37 52 58 29
68 0 0 53 19 53 22 43 9 23 -31 53 31 26 53 8 22
66 0 0 53 28 14 22 43 15 24 -32 53 39 45 53 16 44
64 0 0 53 35 7 22 43 21 26 -33 53 46 36 53 23 38
62 0 0 53 40 31 22 43 28 27 -34 53 51 60 53 29 3
60 0 0 53 44 28 22 43 34 28 -35 53 55 57 53 33 1
58 0 0 53 46 59 22 43 41 29 -36 53 58 27 53 35 32
56 0 0 53 48 4 22 43 48 30 -37 53 59 32 53 36 37
54 0 0 53 47 43 22 43 55 31 -38 53 59 10 53 36 15
52 0 0 53 45 55 22 44 3 32 -39 53 57 24 53 34 28
50 0 0 53 42 42 22 44 10 34 -40 53 54 12 53 31 14
48 0 0 53 38 3 22 44 18 35 -40 53 49 34 53 26 34
46 0 0 53 31 58 22 44 27 36 -41 53 43 29 53 20 27
44 0 0 53 24 26 22 44 35 37 -42 53 35 59 53 12 53
42 0 0 53 15 26 22 44 44 38 -43 53 27 1 53 3 52
40 0 0 53 4 57 22 44 53 39 -44 53 16 34 52 53 21
38 0 0 52 53 0 22 45 2 40 -45 53 4 39 52 41 22
36 0 0 52 39 32 22 45 12 42 -46 52 51 14 52 27 51
34 0 0 52 24 33 22 45 22 43 -46 52 36 18 52 12 49
32 0 0 52 8 1 22 45 32 44 -47 52 19 49 51 56 14
30 0 0 51 49 55 22 45 43 45 -48 52 1 46 51 38 5
28 0 0 51 30 14 22 45 54 46 -49 51 42 8 51 18 20
26 0 0 51 8 55 22 46 5 47 -49 51 20 53 50 56 57
24 0 0 50 45 57 22 46 17 49 -50 50 57 60 50 33 56
22 0 0 50 21 19 22 46 29 50 -51 50 33 26 50 9 13
20 0 0 49 54 58 22 46 41 51 -51 50 7 9 49 42 48
18 0 0 49 26 53 22 46 54 52 -52 49 39 9 49 14 39
16 0 0 48 57 2 22 47 7 53 -53 49 9 22 48 44 43
14 0 0 48 25 23 22 47 21 55 -53 48 37 48 48 12 59
12 0 0 47 51 53 22 47 35 56 -54 48 4 23 47 39 24
10 0 0 47 16 32 22 47 50 57 -54 47 29 7 47 3 58
8 0 0 46 39 17 22 48 5 58 -55 46 51 58 46 26 38
6 0 0 46 0 7 22 48 20 59 -55 46 12 53 45 47 23
4 0 0 45 19 0 22 48 36 61 -55 45 31 51 45 6 11
2 0 0 44 35 55 22 48 53 62 -56 44 48 51 44 23 1
0 0 0 43 50 51 22 49 10 63 -56 44 3 52 43 37 51
- 2 0 0 43 3 46 22 49 27 64 -56 43 16 53 42 50 41
- 4 0 0 42 14 41 22 49 45 65 -56 42 27 53 42 1 30
- 6 0 0 41 23 34 22 50 4 66 -56 41 36 51 41 10 18
- 8 0 0 40 30 26 22 50 23 67 -55 40 43 48 40 17 5
- 10 0 0 39 35 17 22 50 42 68 -55 39 48 44 39 21 52
- 12 0 0 38 38 8 22 51 2 69 -55 38 51 40 38 24 39
- 14 0 0 37 39 1 22 51 23 69 -54 37 52 37 37 25 27
........................... 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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