Update for (36) Atalante - February 15, 2002
Update computed by Jan Manek; issued 07 Feb 2002 22:30:00 +0100 (CET)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(36) Atalante / TYC 2847-00852-1 on February 15, 2002
visible from N France, Switzerland, NE Italy, Slovenia, N Croatia,
N Serbia, SW Romania, NE Bulgaria, Turkey, N Iraq, Iran and India
Summary
In the night of February 15, 2002 a faint 11.5 mag star TYC 2847-00852-1
will be occulted by a 109 km asteroid (36) Atalante. This update is based on
USNO/Flagstaff and TMO astrometry for the asteroid and Tycho-2 star position.
The updated path shows ~3.5 path width south shift with time ~0.2 minutes earlier compared to
Edwin Goffin's nominal prediction.
Updated path runs over France around 18:05.5 UT from Bretagne to Alps, Switzerland 18:05.7 UT,
NE Italy ~18:06 UT with Trieste on south limit, Slovenia ~18:06.1 UT , Croatia with Zagreb ~18:06.2 UT,
N Serbia with Belgrade ~18:06.4 UT and later S Romania and NE Bulgaria ~18:06.8 UT, Turkey ~18:07.5 UT,
N Iraq ~18:07.9 UT, Iran ~18:08.4 UT and finally India at low altitude ~18:09.3 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 15, 2002 @ 18:06 UT (Euro)
* magnitude of target star: 11.5
* magnitude drop [mag]: 1.4
* estimated maximum duration [s]: 4.8
* path description: given above
* Goffin's original chart reference: A02_0206
The occultation path:
* approximate ground width [km]: 110
* uncertainty [path widths]: 1.8
* uncertainty in time [s]: 10
* 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 2847-00852-1
* constellation: Perseus
* J2000 position [h,m,s; o,',"]: 03h 07m 11.9334s; +39o 18' 33.494"
* position source: Tycho-2
* estimated accuracy ["]: 0.13" (0.08", 0.10")
* V mag [mag]: 11.45
* B-V [mag]: +0.78
* remarks:
Target star is in southwest Perseus, in the head of Medusa, only 37' NE of
3.4 mag star rho Persei = SAO 56138 and 6' SE of 9.0 mag star SAO 56160.
Be careful, there is second star of the same brightness only 41" NW of target.
Close finding chart (prepared in GUIDE7):
* occulted star is in center - labeled with cross
* field is 1.5x1.5 degrees
* limiting magnitude is 13.0
* labeled stars have indicated SAO numbers
* remarks:
Data for the minor planet:
* general information:
number, name: (36) Atalante
approx. diameter [km]: 109
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 95 USNO, 25 TMO
number of rejected observations: 7 USNO, 2 TMO
time covered by the observations: 1998 02 24 - 2002 01 26
rms residuals ["] (RA,DE): 0.07", 0.07"
estimated positional accuracy at epoch of event ["]: 0.07", 0.05"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 18:04.7 UT
* approx. V mag of minor planet at event [mag]: 12.5
* geocentric parallax of minor planet ["]: 4.899
* magnitude drop [mag]: 1.4
* estimated maximum duration [s]: 4.8
* apparent motion of minor planet ["/h]: 63.38
* angular distance to moon, phase of moon [deg,%]: 56, 10%
* 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 ' "
- 5 0 0 47 55 20 18 5 1 80 -4 47 25 36 48 25 7
- 4 0 0 47 53 41 18 5 5 80 -5 47 23 55 48 23 29
- 3 0 0 47 51 33 18 5 8 80 -6 47 21 46 48 21 22
- 2 0 0 47 48 57 18 5 11 79 -6 47 19 9 48 18 48
- 1 0 0 47 45 54 18 5 15 79 -7 47 16 4 48 15 45
0 0 0 47 42 22 18 5 18 79 -8 47 12 30 48 12 15
1 0 0 47 38 21 18 5 21 78 -8 47 8 28 48 8 17
2 0 0 47 33 53 18 5 24 78 -9 47 3 57 48 3 51
3 0 0 47 28 56 18 5 28 77 -10 46 58 57 47 58 56
4 0 0 47 23 30 18 5 31 77 -10 46 53 28 47 53 33
5 0 0 47 17 35 18 5 34 76 -11 46 47 31 47 47 41
6 0 0 47 11 11 18 5 38 76 -12 46 41 4 47 41 21
7 0 0 47 4 18 18 5 41 75 -12 46 34 7 47 34 31
8 0 0 46 56 55 18 5 44 74 -13 46 26 41 47 27 12
9 0 0 46 49 3 18 5 48 74 -14 46 18 45 47 19 24
10 0 0 46 40 41 18 5 51 73 -14 46 10 18 47 11 6
11 0 0 46 31 48 18 5 54 73 -15 46 1 21 47 2 18
12 0 0 46 22 26 18 5 58 72 -16 45 51 54 46 52 60
13 0 0 46 12 32 18 6 1 71 -17 45 41 55 46 43 11
14 0 0 46 2 7 18 6 5 71 -17 45 31 26 46 32 51
15 0 0 45 51 11 18 6 8 70 -18 45 20 24 46 22 1
16 0 0 45 39 44 18 6 11 69 -19 45 8 51 46 10 39
17 0 0 45 27 44 18 6 15 69 -19 44 56 46 45 58 45
18 0 0 45 15 12 18 6 18 68 -20 44 44 8 45 46 19
19 0 0 45 2 7 18 6 22 67 -21 44 30 57 45 33 21
20 0 0 44 48 30 18 6 25 67 -22 44 17 12 45 19 49
21 0 0 44 34 18 18 6 28 66 -22 44 2 55 45 5 45
22 0 0 44 19 33 18 6 32 65 -23 43 48 3 44 51 7
23 0 0 44 4 14 18 6 35 65 -24 43 32 36 44 35 55
24 0 0 43 48 20 18 6 39 64 -25 43 16 35 44 20 8
25 0 0 43 31 51 18 6 42 63 -25 42 59 59 44 3 47
26 0 0 43 14 47 18 6 46 62 -26 42 42 46 43 46 50
27 0 0 42 57 7 18 6 49 62 -27 42 24 58 43 29 18
28 0 0 42 38 50 18 6 53 61 -28 42 6 34 43 11 10
29 0 0 42 19 57 18 6 56 60 -28 41 47 32 42 52 25
30 0 0 42 0 26 18 6 59 59 -29 41 27 53 42 33 3
31 0 0 41 40 18 18 7 3 58 -30 41 7 36 42 13 3
32 0 0 41 19 32 18 7 6 58 -31 40 46 41 41 52 26
33 0 0 40 58 7 18 7 10 57 -32 40 25 7 41 31 10
34 0 0 40 36 4 18 7 13 56 -32 40 2 55 41 9 16
35 0 0 40 13 21 18 7 17 55 -33 39 40 2 40 46 42
36 0 0 39 49 58 18 7 20 54 -34 39 16 30 40 23 29
37 0 0 39 25 55 18 7 24 53 -35 38 52 17 39 59 36
38 0 0 39 1 12 18 7 27 53 -36 38 27 24 39 35 2
39 0 0 38 35 47 18 7 31 52 -37 38 1 50 39 9 48
40 0 0 38 9 41 18 7 34 51 -38 37 35 34 38 43 52
41 0 0 37 42 54 18 7 38 50 -39 37 8 36 38 17 14
42 0 0 37 15 24 18 7 41 49 -39 36 40 57 37 49 55
43 0 0 36 47 12 18 7 45 48 -40 36 12 35 37 21 53
44 0 0 36 18 18 18 7 48 47 -41 35 43 30 36 53 9
45 0 0 35 48 40 18 7 52 46 -42 35 13 42 36 23 42
46 0 0 35 18 20 18 7 55 45 -43 34 43 12 35 53 32
47 0 0 34 47 16 18 7 58 44 -44 34 11 58 35 22 39
48 0 0 34 15 29 18 8 2 43 -45 33 40 0 34 51 2
49 0 0 33 42 59 18 8 5 42 -46 33 7 19 34 18 42
50 0 0 33 9 45 18 8 9 41 -47 32 33 55 33 45 38
51 0 0 32 35 47 18 8 12 40 -48 31 59 47 33 11 51
52 0 0 32 1 6 18 8 15 39 -49 31 24 56 32 37 20
53 0 0 31 25 42 18 8 18 38 -50 30 49 22 32 2 6
54 0 0 30 49 34 18 8 21 37 -51 30 13 4 31 26 8
55 0 0 30 12 44 18 8 25 36 -52 29 36 4 30 49 28
56 0 0 29 35 11 18 8 28 35 -53 28 58 22 30 12 5
57 0 0 28 56 56 18 8 31 34 -54 28 19 57 29 33 59
58 0 0 28 17 59 18 8 34 33 -55 27 40 51 28 55 12
59 0 0 27 38 21 18 8 37 32 -56 27 1 4 28 15 43
60 0 0 26 58 3 18 8 40 31 -57 26 20 37 27 35 33
61 0 0 26 17 4 18 8 42 30 -58 25 39 30 26 54 43
62 0 0 25 35 27 18 8 45 28 -59 24 57 44 26 13 14
63 0 0 24 53 11 18 8 48 27 -61 24 15 21 25 31 6
64 0 0 24 10 18 18 8 50 26 -62 23 32 21 24 48 21
65 0 0 23 26 50 18 8 53 25 -63 22 48 44 24 4 60
66 0 0 22 42 46 18 8 55 24 -64 22 4 34 23 21 3
67 0 0 21 58 8 18 8 58 23 -65 21 19 50 22 36 32
68 0 0 21 12 58 18 8 60 21 -66 20 34 34 21 51 28
69 0 0 20 27 17 18 9 2 20 -67 19 48 47 21 5 53
70 0 0 19 41 7 18 9 4 19 -68 19 2 32 20 19 47
71 0 0 18 54 29 18 9 6 18 -69 18 15 49 19 33 14
72 0 0 18 7 24 18 9 8 17 -71 17 28 40 18 46 14
73 0 0 17 19 55 18 9 9 15 -72 16 41 7 17 58 49
74 0 0 16 32 4 18 9 11 14 -73 15 53 12 17 11 0
75 0 0 15 43 51 18 9 12 13 -74 15 4 57 16 22 51
76 0 0 14 55 20 18 9 14 12 -75 14 16 23 15 34 22
77 0 0 14 6 32 18 9 15 10 -76 13 27 34 14 45 36
........................... 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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