Update for (1208) Troilus - November 22/23, 2002
Update computed by Jan Manek; issued 17 Nov 2002 00:24:00 +0100 (CET)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(1208) Troilus / TYC 3358-02307-1 on November 22/23, 2002
visible from Malaysia, India, S Russia, N Ukraine, S Belarus,
N Poland, N Germany, N Netherland, England and S Ireland
Summary
In the night of November 22/23, 2002 a faint 13.0 mag star TYC 3358-02307-1
will be occulted by a 111 km asteroid (1208) Troilus. This update is based on
USNO/Flagstaff and TMO astrometry for the asteroid and Tycho-2 position.
The updated path shows ~4 path width north shift with time 0.7 minutes earlier minutes compared to
Edwin Goffin's nominal prediction.
Updated path runs over Malaysia ~22:03 UT, India around 22:05 UT, S Russia ~22:08 UT with Volgograd in path,
N Ukraine ~22:08.5 UT with Kharkov on south limit, S Belarus ~22:09 UT, N Poland ~22:09.5 UT,
N Germany ~22:10 UT with Hamburg in path, N Netherlands 22:10.2 UT, England ~22:10.6 UT and S Ireland ~22:10.9 UT.
Uncertainty is rather high, mainly because no better than Tycho-2 star position is available.
Please check the path chart for details.
Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: November 22, 2002 @ 22:05 UT (India)
22:10 UT (Europe)
* magnitude of target star: 13.0
* magnitude drop [mag]: 3.4
* estimated maximum duration [s]: 5.7
* path description: given above
* Goffin's original chart reference: A02_1145
The occultation path:
* approximate ground width [km]: 115
* uncertainty [path widths]: 7.5
* uncertainty in time [s]: 35
* 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 3358-02307-1
* constellation: Auriga
* J2000 position [h,m,s; o,',"]: 05h 24m 27.5486s; +45o 33' 46.563"
* position source: Tycho-2
* estimated accuracy ["]: 0.25" (0.15", 0.20")
* V mag [mag]: 12.95
* B-V [mag]: -0.11
* remarks:
Target star is in north Auriga, 1.4 degrees ESE of 0.0 mag star alpha Aurigae = SAO 40186.
At these magnitudes the Tycho-2 positions are not very accurate.
!!! 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 12.0
* labeled stars have indicated SAO numbers
* remarks: second chart is 30'x30' enlargement with 15.0 mag limit
Data for the minor planet:
* general information:
number, name: (1208) Troilus
approx. diameter [km]: 111
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 74 USNO, 19 TMO
number of rejected observations: 14 USNO
time covered by the observations: 1999 08 07 - 2002 11 11
rms residuals ["] (RA,DE): 0.15", 0.19"
estimated positional accuracy at epoch of event ["]: 0.06", 0.06"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 22:07.7 UT
* approx. V mag of minor planet at event [mag]: 16.3
* geocentric parallax of minor planet ["]: 2.001
* magnitude drop [mag]: 3.4
* estimated maximum duration [s]: 5.7
* apparent motion of minor planet ["/h]: 21.87
* angular distance to moon, phase of moon [deg,%]: 22, 92%
* remarks:
Elements for WinOccult:
============ cut here ===========================================
2002 Nov 22
1208 Troilus
22h 7.7m UT
58-02307-1 13.0 5 24 27.549 45 33 46.56TYC 3358-02307-1
16.3 111 5.7 4.395 -1.848 10.11
47.475 45.560 204.64 -20.24
22.1280 .01349 .02564 -9.69238 5.05319 -0.00225 -0.00229
2000 87.754417220021122.00000296.63314248.595987 33.573691 0.092310685.235241354.751972678.995 0.15
RATE .8228089 .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
108 0 0 - 4 1 19 22 2 28 18 -6 - 3 13 26 - 4 49 11
107 0 0 - 2 46 42 22 2 31 20 -7 - 1 58 44 - 3 34 39
106 0 0 - 1 31 50 22 2 34 21 -9 - 0 43 48 - 2 19 50
105 0 0 - 0 16 48 22 2 37 23 -10 0 31 16 - 1 4 50
104 0 0 0 58 18 22 2 41 24 -11 1 46 23 0 10 15
103 0 0 2 13 23 22 2 45 26 -13 3 1 27 1 25 20
102 0 0 3 28 21 22 2 49 27 -14 4 16 23 2 40 20
101 0 0 4 43 7 22 2 53 29 -16 5 31 6 3 55 9
100 0 0 5 57 36 22 2 58 31 -17 6 45 30 5 9 42
99 0 0 7 11 41 22 3 2 32 -18 7 59 30 6 23 53
98 0 0 8 25 19 22 3 7 34 -20 9 13 1 7 37 38
97 0 0 9 38 24 22 3 12 35 -21 10 25 58 8 50 51
96 0 0 10 50 52 22 3 17 37 -22 11 38 17 10 3 28
95 0 0 12 2 38 22 3 23 38 -23 12 49 53 11 15 25
94 0 0 13 13 39 22 3 28 40 -25 14 0 42 12 26 36
93 0 0 14 23 49 22 3 34 41 -26 15 10 41 13 36 59
92 0 0 15 33 6 22 3 40 43 -27 16 19 44 14 46 29
91 0 0 16 41 26 22 3 45 44 -28 17 27 50 15 55 3
90 0 0 17 48 46 22 3 51 46 -29 18 34 56 17 2 38
89 0 0 18 55 3 22 3 57 47 -31 19 40 57 18 9 10
88 0 0 20 0 15 22 4 3 49 -32 20 45 53 19 14 39
87 0 0 21 4 20 22 4 10 50 -33 21 49 41 20 18 60
86 0 0 22 7 15 22 4 16 51 -34 22 52 18 21 22 12
85 0 0 23 8 58 22 4 22 53 -35 23 53 44 22 24 14
84 0 0 24 9 30 22 4 28 54 -36 24 53 57 23 25 3
83 0 0 25 8 47 22 4 34 55 -37 25 52 56 24 24 40
82 0 0 26 6 50 22 4 41 57 -38 26 50 39 25 23 2
81 0 0 27 3 37 22 4 47 58 -39 27 47 7 26 20 8
80 0 0 27 59 9 22 4 53 59 -40 28 42 19 27 15 60
79 0 0 28 53 24 22 4 59 60 -41 29 36 15 28 10 35
78 0 0 29 46 24 22 5 5 62 -42 30 28 55 29 3 54
77 0 0 30 38 7 22 5 11 63 -43 31 20 18 29 55 57
76 0 0 31 28 34 22 5 18 64 -43 32 10 25 30 46 45
75 0 0 32 17 46 22 5 24 65 -44 32 59 16 31 36 17
74 0 0 33 5 43 22 5 30 66 -45 33 46 53 32 24 34
73 0 0 33 52 25 22 5 36 67 -46 34 33 15 33 11 36
72 0 0 34 37 54 22 5 42 69 -46 35 18 24 33 57 25
71 0 0 35 22 10 22 5 47 70 -47 36 2 20 34 42 0
70 0 0 36 5 13 22 5 53 71 -48 36 45 4 35 25 24
69 0 0 36 47 6 22 5 59 72 -48 37 26 38 36 7 36
68 0 0 37 27 50 22 6 5 73 -49 38 7 1 36 48 39
67 0 0 38 7 24 22 6 10 74 -50 38 46 16 37 28 32
66 0 0 38 45 50 22 6 16 75 -50 39 24 24 38 7 18
65 0 0 39 23 10 22 6 21 76 -51 40 1 25 38 44 56
64 0 0 39 59 25 22 6 26 76 -51 40 37 22 39 21 29
63 0 0 40 34 36 22 6 32 77 -52 41 12 14 39 56 58
62 0 0 41 8 43 22 6 37 78 -52 41 46 4 40 31 23
61 0 0 41 41 49 22 6 42 79 -53 42 18 52 41 4 47
60 0 0 42 13 54 22 6 47 80 -53 42 50 41 41 37 9
59 0 0 42 45 1 22 6 52 81 -54 43 21 30 42 8 32
58 0 0 43 15 9 22 6 57 82 -54 43 51 22 42 38 57
57 0 0 43 44 20 22 7 2 82 -54 44 20 17 43 8 25
56 0 0 44 12 36 22 7 7 83 -55 44 48 17 43 36 57
55 0 0 44 39 58 22 7 12 84 -55 45 15 23 44 4 33
54 0 0 45 6 26 22 7 17 84 -55 45 41 36 44 31 17
53 0 0 45 32 2 22 7 21 85 -56 46 6 57 44 57 8
52 0 0 45 56 47 22 7 26 85 -56 46 31 28 45 22 7
51 0 0 46 20 43 22 7 30 86 -56 46 55 9 45 46 17
50 0 0 46 43 49 22 7 35 86 -56 47 18 2 46 9 37
49 0 0 47 6 8 22 7 39 86 -57 47 40 8 46 32 9
48 0 0 47 27 40 22 7 44 86 -57 48 1 27 46 53 54
47 0 0 47 48 26 22 7 48 86 -57 48 22 1 47 14 53
46 0 0 48 8 28 22 7 52 86 -57 48 41 50 47 35 7
45 0 0 48 27 46 22 7 56 85 -57 49 0 56 47 54 36
44 0 0 48 46 21 22 8 1 85 -57 49 19 19 48 13 22
43 0 0 49 4 13 22 8 5 84 -58 49 37 1 48 31 26
42 0 0 49 21 25 22 8 9 84 -58 49 54 2 48 48 49
41 0 0 49 37 56 22 8 13 83 -58 50 10 23 49 5 30
40 0 0 49 53 48 22 8 17 83 -58 50 26 4 49 21 32
39 0 0 50 9 0 22 8 20 82 -58 50 41 7 49 36 54
38 0 0 50 23 35 22 8 24 81 -58 50 55 33 49 51 38
37 0 0 50 37 32 22 8 28 81 -58 51 9 21 50 5 44
36 0 0 50 50 53 22 8 32 80 -58 51 22 33 50 19 13
35 0 0 51 3 37 22 8 36 80 -58 51 35 9 50 32 5
34 0 0 51 15 46 22 8 39 79 -58 51 47 10 50 44 22
33 0 0 51 27 19 22 8 43 78 -58 51 58 36 50 56 3
32 0 0 51 38 19 22 8 47 78 -58 52 9 28 51 7 10
31 0 0 51 48 44 22 8 50 77 -58 52 19 47 51 17 42
30 0 0 51 58 37 22 8 54 77 -58 52 29 33 51 27 41
29 0 0 52 7 56 22 8 57 76 -58 52 38 46 51 37 6
28 0 0 52 16 43 22 9 1 75 -58 52 47 27 51 45 59
27 0 0 52 24 58 22 9 4 75 -58 52 55 37 51 54 19
26 0 0 52 32 41 22 9 8 74 -58 53 3 15 52 2 8
25 0 0 52 39 53 22 9 11 74 -58 53 10 22 52 9 25
24 0 0 52 46 34 22 9 14 73 -57 53 16 59 52 16 10
23 0 0 52 52 45 22 9 18 72 -57 53 23 5 52 22 25
22 0 0 52 58 25 22 9 21 72 -57 53 28 41 52 28 9
21 0 0 53 3 35 22 9 24 71 -57 53 33 48 52 33 22
20 0 0 53 8 15 22 9 27 71 -57 53 38 25 52 38 6
19 0 0 53 12 26 22 9 31 70 -57 53 42 33 52 42 19
18 0 0 53 16 7 22 9 34 69 -57 53 46 12 52 46 3
17 0 0 53 19 19 22 9 37 69 -56 53 49 22 52 49 17
16 0 0 53 22 3 22 9 40 68 -56 53 52 3 52 52 2
15 0 0 53 24 17 22 9 43 68 -56 53 54 16 52 54 18
14 0 0 53 26 2 22 9 47 67 -56 53 56 0 52 56 4
13 0 0 53 27 19 22 9 50 67 -56 53 57 16 52 57 22
12 0 0 53 28 7 22 9 53 66 -55 53 58 3 52 58 10
11 0 0 53 28 26 22 9 56 65 -55 53 58 22 52 58 30
10 0 0 53 28 16 22 9 59 65 -55 53 58 13 52 58 20
9 0 0 53 27 38 22 10 2 64 -55 53 57 35 52 57 42
8 0 0 53 26 31 22 10 5 64 -55 53 56 29 52 56 34
7 0 0 53 24 56 22 10 8 63 -54 53 54 55 52 54 57
6 0 0 53 22 51 22 10 11 62 -54 53 52 52 52 52 52
5 0 0 53 20 18 22 10 14 62 -54 53 50 20 52 50 17
4 0 0 53 17 16 22 10 17 61 -54 53 47 20 52 47 12
3 0 0 53 13 44 22 10 20 61 -53 53 43 50 52 43 38
2 0 0 53 9 43 22 10 23 60 -53 53 39 52 52 39 34
1 0 0 53 5 12 22 10 26 60 -53 53 35 24 52 35 1
0 0 0 53 0 12 22 10 29 59 -52 53 30 27 52 29 57
- 1 0 0 52 54 41 22 10 32 58 -52 53 25 0 52 24 22
- 2 0 0 52 48 40 22 10 35 58 -52 53 19 3 52 18 18
- 3 0 0 52 42 9 22 10 38 57 -51 53 12 36 52 11 42
- 4 0 0 52 35 6 22 10 41 57 -51 53 5 38 52 4 34
- 5 0 0 52 27 32 22 10 44 56 -51 52 58 9 51 56 55
- 6 0 0 52 19 27 22 10 47 55 -50 52 50 9 51 48 45
- 7 0 0 52 10 49 22 10 50 55 -50 52 41 37 51 40 1
- 8 0 0 52 1 39 22 10 53 54 -50 52 32 33 51 30 45
- 9 0 0 51 51 56 22 10 56 53 -49 52 22 56 51 20 55
- 10 0 0 51 41 39 22 10 59 53 -49 52 12 46 51 10 32
- 11 0 0 51 30 48 22 11 2 52 -49 52 2 3 50 59 34
- 12 0 0 51 19 23 22 11 5 52 -48 51 50 45 50 48 1
- 13 0 0 51 7 23 22 11 7 51 -48 51 38 53 50 35 53
- 14 0 0 50 54 47 22 11 10 50 -47 51 26 25 50 23 9
- 15 0 0 50 41 35 22 11 13 50 -47 51 13 21 50 9 48
- 16 0 0 50 27 45 22 11 16 49 -47 50 59 41 49 55 50
- 17 0 0 50 13 19 22 11 19 48 -46 50 45 23 49 41 14
- 18 0 0 49 58 13 22 11 22 48 -46 50 30 28 49 25 59
- 19 0 0 49 42 29 22 11 25 47 -45 50 14 53 49 10 5
- 20 0 0 49 26 4 22 11 28 46 -45 49 58 39 48 53 30
........................... 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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