Update for (258) Tyche - March 13/14, 2003
Update computed by Jan Manek; issued 09 Mar 2003 02:10 +0100 (CET)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(258) Tyche / TYC 0156-00065-1 = PPM 151360 on March 13/14, 2003
visible from W Algeria, N Italy, Austria, E Czechia,
Poland, NW Belarus and Russia
Summary
In the night of March 13/14, 2003 a bright 9.5 mag star TYC 0156-00065-1 = PPM 151360
will be occulted by a 68 km asteroid (258) Tyche. This update is based on
USNO/Flagstaff and TMO astrometry for the asteroid and recent UCAC star position.
The updated path shows ~5 path width NW shift with time 0.2 minutes earlier compared to
Edwin Goffin's nominal prediction.
Updated path runs over Morocco around ~19:32 UT, very W Algeria ~19:33 UT, N Italy ~19:35.3 UT,
Austria ~19:35.8 UT and just west of Vienna, E Czechia ~19:36.1 UT with Brno in path and Ostrava on SE limit,
Poland around 19:36.6 UT with Warsaw in path and Lodz on NW limit, NW Belarus ~19:37.3 UT and finally
Russia 19:37.5->19:39 UT with Vologda on south limit.
Please check the path chart for details.
73% Moon is only 23 degrees NE of target star. Together with poor starfield makes it hard to find target.
Start the field location well in advance. Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: March 13, 2003 @ 19:36 UT (Europe)
* magnitude of target star: 9.5
* magnitude drop [mag]: 3.9
* estimated maximum duration [s]: 7.3
* path description: given above
* Goffin's original chart reference: A03_0325
The occultation path:
* approximate ground width [km]: 75
* uncertainty [path widths]: 1.1
* 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 0156-00065-1 = PPM 151360
* constellation: Monoceros
* J2000 position [h,m,s; o,',"]: 06h 50m 28.4660s; +05o 33' 03.720"
* position source: recent UCAC position combined with Tycho-2 proper motion
* estimated accuracy ["]: 0.03" (0.02", 0.02")
* V mag [mag]: 9.51
* B-V [mag]: +0.40
* remarks:
Target star is in north Monoceros, far from bright stars. There is 6.8 mag star
SAO 114487 only 8.4' NW 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 GUIDE8):
* 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' blowup to show correctly the target star in the field.
Data for the minor planet:
* general information:
number, name: (258) Tyche
approx. diameter [km]: 68
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 121 USNO, 7 TMO
number of rejected observations: 10 USNO
time covered by the observations: 1998 11 15 - 2003 02 22
rms residuals ["] (RA,DE): 0.06", 0.08"
estimated positional accuracy at epoch of event ["]: 0.04", 0.05"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 19:28.9 UT
* approx. V mag of minor planet at event [mag]: 13.4
* geocentric parallax of minor planet ["]: 3.812
* magnitude drop [mag]: 3.9
* estimated maximum duration [s]: 7.3
* apparent motion of minor planet ["/h]: 20.09
* angular distance to moon, phase of moon [deg,%]: 23, 74%
* remarks:
Elements for WinOccult:
============ cut here ===========================================
2003 Mar 13
258 Tyche
19h 28.9m UT
56-00065-1 9.5 6 50 28.466 5 33 3.72TYC 0156-00065-1
13.4 68 7.3 2.307 0.966 14.01
-0.628 5.547 250.15 -2.85
19.4819 -.24401 .24943 3.78062 3.67742 0.00549 0.00009
2000 98.76863652003 312.00000154.477542207.82973114.259593 0.203239112.617277292.085344208.505 0.23
RATE 2.3277125 .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
- 11 0 0 25 2 55 19 30 16 68 -10 24 32 18 25 33 40
- 10 0 0 26 8 19 19 30 33 68 -10 25 37 41 26 39 6
- 9 0 0 27 13 14 19 30 50 67 -11 26 42 35 27 44 1
- 8 0 0 28 17 33 19 31 7 66 -12 27 46 55 28 48 20
- 7 0 0 29 21 13 19 31 23 66 -13 28 50 36 29 51 59
- 6 0 0 30 24 10 19 31 39 65 -14 29 53 35 30 54 53
- 5 0 0 31 26 19 19 31 55 64 -15 30 55 47 31 56 59
- 4 0 0 32 27 37 19 32 11 63 -16 31 57 9 32 58 13
- 3 0 0 33 28 0 19 32 26 62 -16 32 57 38 33 58 31
- 2 0 0 34 27 26 19 32 41 61 -17 33 57 9 34 57 51
- 1 0 0 35 25 52 19 32 55 60 -18 34 55 42 35 56 11
0 0 0 36 23 15 19 33 9 59 -18 35 53 12 36 53 26
1 0 0 37 19 33 19 33 23 58 -19 36 49 38 37 49 37
2 0 0 38 14 45 19 33 36 57 -20 37 44 58 38 44 40
3 0 0 39 8 48 19 33 49 56 -20 38 39 10 39 38 34
4 0 0 40 1 42 19 34 2 55 -21 39 32 14 40 31 17
5 0 0 40 53 25 19 34 14 54 -21 40 24 7 41 22 50
6 0 0 41 43 57 19 34 26 53 -22 41 14 49 42 13 11
7 0 0 42 33 17 19 34 37 52 -22 42 4 21 43 2 20
8 0 0 43 21 25 19 34 48 51 -23 42 52 40 43 50 17
9 0 0 44 8 21 19 34 59 50 -23 43 39 48 44 37 1
10 0 0 44 54 5 19 35 9 49 -24 44 25 44 45 22 33
11 0 0 45 38 37 19 35 19 48 -24 45 10 29 46 6 53
12 0 0 46 21 59 19 35 29 47 -25 45 54 2 46 50 1
13 0 0 47 4 9 19 35 38 47 -25 46 36 26 47 31 59
14 0 0 47 45 10 19 35 47 46 -25 47 17 39 48 12 47
15 0 0 48 25 2 19 35 56 45 -26 47 57 44 48 52 26
16 0 0 49 3 46 19 36 4 44 -26 48 36 41 49 30 58
17 0 0 49 41 24 19 36 12 43 -26 49 14 32 50 8 22
18 0 0 50 17 55 19 36 20 42 -27 49 51 16 50 44 40
19 0 0 50 53 22 19 36 27 41 -27 50 26 56 51 19 54
20 0 0 51 27 46 19 36 35 40 -27 51 1 32 51 54 4
21 0 0 52 1 7 19 36 42 40 -27 51 35 6 52 27 13
22 0 0 52 33 28 19 36 48 39 -27 52 7 40 52 59 21
23 0 0 53 4 49 19 36 55 38 -28 52 39 14 53 30 29
24 0 0 53 35 12 19 37 1 37 -28 53 9 49 54 0 40
25 0 0 54 4 38 19 37 7 37 -28 53 39 28 54 29 54
26 0 0 54 33 9 19 37 13 36 -28 54 8 11 54 58 12
27 0 0 55 0 46 19 37 18 35 -28 54 36 0 55 25 37
28 0 0 55 27 30 19 37 23 34 -28 55 2 56 55 52 9
29 0 0 55 53 23 19 37 29 34 -29 55 29 0 56 17 50
30 0 0 56 18 25 19 37 34 33 -29 55 54 14 56 42 41
31 0 0 56 42 39 19 37 38 32 -29 56 18 39 57 6 43
32 0 0 57 6 5 19 37 43 32 -29 56 42 16 57 29 58
33 0 0 57 28 45 19 37 47 31 -29 57 5 7 57 52 27
34 0 0 57 50 39 19 37 52 30 -29 57 27 12 58 14 11
35 0 0 58 11 50 19 37 56 30 -29 57 48 33 58 35 11
36 0 0 58 32 18 19 37 60 29 -29 58 9 11 58 55 28
37 0 0 58 52 4 19 38 4 29 -29 58 29 7 59 15 4
38 0 0 59 11 9 19 38 7 28 -29 58 48 22 59 34 0
39 0 0 59 29 35 19 38 11 27 -29 59 6 57 59 52 16
40 0 0 59 47 22 19 38 14 27 -29 59 24 53 60 9 54
41 0 0 60 4 32 19 38 18 26 -29 59 42 12 60 26 55
42 0 0 60 21 5 19 38 21 26 -29 59 58 53 60 43 19
43 0 0 60 37 2 19 38 24 25 -29 60 14 59 60 59 8
44 0 0 60 52 24 19 38 27 25 -29 60 30 30 61 14 22
45 0 0 61 7 13 19 38 30 24 -29 60 45 26 61 29 3
46 0 0 61 21 28 19 38 32 23 -29 60 59 50 61 43 10
47 0 0 61 35 11 19 38 35 23 -29 61 13 40 61 56 46
48 0 0 61 48 23 19 38 38 22 -29 61 26 59 62 9 50
49 0 0 62 1 4 19 38 40 22 -29 61 39 47 62 22 24
50 0 0 62 13 14 19 38 43 21 -29 61 52 4 62 34 28
51 0 0 62 24 56 19 38 45 21 -29 62 3 52 62 46 2
52 0 0 62 36 8 19 38 47 20 -29 62 15 10 62 57 8
53 0 0 62 46 52 19 38 49 20 -29 62 26 1 63 7 47
54 0 0 62 57 9 19 38 51 19 -29 62 36 23 63 17 57
55 0 0 63 6 58 19 38 54 19 -29 62 46 18 63 27 41
56 0 0 63 16 22 19 38 55 18 -29 62 55 47 63 36 59
57 0 0 63 25 19 19 38 57 18 -29 63 4 49 63 45 51
58 0 0 63 33 51 19 38 59 18 -29 63 13 26 63 54 18
59 0 0 63 41 57 19 39 1 17 -29 63 21 37 64 2 20
60 0 0 63 49 40 19 39 3 17 -29 63 29 24 64 9 58
61 0 0 63 56 58 19 39 4 16 -29 63 36 46 64 17 12
62 0 0 64 3 52 19 39 6 16 -29 63 43 45 64 24 2
63 0 0 64 10 23 19 39 7 15 -29 63 50 20 64 30 29
64 0 0 64 16 31 19 39 9 15 -29 63 56 31 64 36 34
65 0 0 64 22 16 19 39 10 14 -29 64 2 20 64 42 16
66 0 0 64 27 39 19 39 12 14 -28 64 7 46 64 47 36
67 0 0 64 32 40 19 39 13 13 -28 64 12 50 64 52 34
68 0 0 64 37 19 19 39 14 13 -28 64 17 32 64 57 10
69 0 0 64 41 37 19 39 16 13 -28 64 21 52 65 1 25
70 0 0 64 45 33 19 39 17 12 -28 64 25 50 65 5 19
71 0 0 64 49 8 19 39 18 12 -28 64 29 27 65 8 52
72 0 0 64 52 23 19 39 19 11 -28 64 32 43 65 12 4
73 0 0 64 55 16 19 39 20 11 -28 64 35 39 65 14 56
74 0 0 64 57 49 19 39 21 10 -28 64 38 13 65 17 28
75 0 0 65 0 2 19 39 22 10 -28 64 40 27 65 19 39
76 0 0 65 1 54 19 39 23 10 -28 64 42 20 65 21 30
77 0 0 65 3 26 19 39 24 9 -27 64 43 53 65 23 1
79 0 0 65 5 29 19 39 25 8 -27 64 45 57 65 25 4
78 0 0 65 4 38 19 39 25 9 -27 64 45 5 65 24 13
80 0 0 65 6 1 19 39 26 8 -27 64 46 29 65 25 36
81 0 0 65 6 13 19 39 27 7 -27 64 46 41 65 25 47
82 0 0 65 6 5 19 39 28 7 -27 64 46 33 65 25 39
83 0 0 65 5 37 19 39 28 7 -27 64 46 4 65 25 12
84 0 0 65 4 49 19 39 29 6 -27 64 45 16 65 24 24
85 0 0 65 3 41 19 39 29 6 -27 64 44 7 65 23 17
........................... 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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