Update for (838) Seraphina - February 20/21, 2002
Update computed by Jan Manek; issued 12 Feb 2002 23:30:00 +0100 (CET)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(838) Seraphina / TYC 0206-01072-1 on February 20/21, 2002
visible from middle East, Greece, Italy, France, SW England and SW Ireland
Summary
In the night of February 20/21, 2002 a 10.9 mag star TYC 0206-01072-1
will be occulted by a 63 km asteroid (838) Seraphina. This update is based on
USNO/Flagstaff and TMO astrometry for the asteroid and UCAC star position.
The updated path shows ~4.5 path width north shift with time ~0.3 minutes earlier compared to
Edwin Goffin's nominal prediction.
Updated path runs over middle East ~23:27 UT and Greece ~23:29.3 UT. Then path runs over whole
Italy from SE ~23:30 UT to NW ~23:31:8 UT with Rome on south limit and Genova, Torino on north limit.
Later France from SE to NW is in path around 23:32.4 UT and Paris is ~100km north of path.
Cornwall in SW England ~23:33.3 UT and SW Ireland ~23:33.9 UT follow.
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 20, 2002 @ 23:31 UT (Euro)
* magnitude of target star: 10.9
* magnitude drop [mag]: 4.0
* estimated maximum duration [s]: 6.2
* path description: given above
* Goffin's original chart reference: A02_0240
The occultation path:
* approximate ground width [km]: 90
* uncertainty [path widths]: 2.2
* uncertainty in time [s]: 15
* 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 0206-01072-1
* constellation: Canis Minor
* J2000 position [h,m,s; o,',"]: 08h 01m 44.9670s; +06o 31' 45.273"
* position source: UCAC combined with Tycho-2 proper motion
* estimated accuracy ["]: 0.02" (0.010", 0.015")
* V mag [mag]: 10.85
* B-V [mag]: +0.11
* remarks:
Target star is in western Canis Minor, close to border with Cancer, about midway
between 3.5 mag beta Cancri = SAO 116569 and 0.4 mag alpha Canis Minoris = SAO 115756.
Target star is 10' WSW of 8.6 mag star SAO 116261.
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: (838) Seraphina
approx. diameter [km]: 63
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 76 USNO, 3 TMO
number of rejected observations: 9 USNO
time covered by the observations: 1998 02 26 - 2002 02 10
rms residuals ["] (RA,DE): 0.10", 0.07"
estimated positional accuracy at epoch of event ["]: 0.07", 0.07"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 23:32.3 UT
* approx. V mag of minor planet at event [mag]: 14.9
* geocentric parallax of minor planet ["]: 3.893
* magnitude drop [mag]: 4.0
* estimated maximum duration [s]: 6.2
* apparent motion of minor planet ["/h]: 22.36
* angular distance to moon, phase of moon [deg,%]: 54, 55%
* 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 ' "
49 0 0 26 58 35 23 26 3 20 -52 27 24 35 26 32 48
48 0 0 27 17 31 23 26 8 21 -52 27 43 36 26 51 39
47 0 0 27 36 54 23 26 13 22 -53 28 3 4 27 10 58
46 0 0 27 56 45 23 26 19 23 -54 28 22 60 27 30 44
45 0 0 28 17 3 23 26 24 23 -54 28 43 23 27 50 57
44 0 0 28 37 48 23 26 30 24 -55 29 4 13 28 11 37
43 0 0 28 58 59 23 26 36 25 -56 29 25 29 28 32 42
42 0 0 29 20 35 23 26 43 26 -56 29 47 11 28 54 14
41 0 0 29 42 37 23 26 49 27 -57 30 9 18 29 16 10
40 0 0 30 5 3 23 26 56 27 -57 30 31 49 29 38 31
39 0 0 30 27 54 23 27 3 28 -58 30 54 45 30 1 16
38 0 0 30 51 8 23 27 10 29 -58 31 18 5 30 24 24
37 0 0 31 14 44 23 27 17 30 -59 31 41 48 30 47 55
36 0 0 31 38 44 23 27 24 30 -59 32 5 53 31 11 49
35 0 0 32 3 5 23 27 31 31 -60 32 30 20 31 36 4
34 0 0 32 27 47 23 27 39 32 -60 32 55 8 32 0 41
33 0 0 32 52 50 23 27 47 33 -60 33 20 17 32 25 37
32 0 0 33 18 12 23 27 55 33 -61 33 45 45 32 50 54
31 0 0 33 43 54 23 28 3 34 -61 34 11 33 33 16 30
30 0 0 34 9 54 23 28 11 35 -61 34 37 40 33 42 24
29 0 0 34 36 12 23 28 19 35 -61 35 4 4 34 8 36
28 0 0 35 2 47 23 28 27 36 -61 35 30 45 34 35 5
27 0 0 35 29 38 23 28 36 36 -61 35 57 43 35 1 50
26 0 0 35 56 45 23 28 44 37 -61 36 24 56 35 28 51
25 0 0 36 24 7 23 28 53 37 -61 36 52 24 35 56 6
24 0 0 36 51 43 23 29 1 38 -61 37 20 6 36 23 36
23 0 0 37 19 31 23 29 10 38 -61 37 48 1 36 51 18
22 0 0 37 47 32 23 29 19 39 -61 38 16 9 37 19 13
21 0 0 38 15 45 23 29 28 39 -61 38 44 28 37 47 20
20 0 0 38 44 8 23 29 37 40 -61 39 12 57 38 15 37
19 0 0 39 12 42 23 29 46 40 -61 39 41 37 38 44 4
18 0 0 39 41 24 23 29 55 41 -60 40 10 25 39 12 41
17 0 0 40 10 14 23 30 4 41 -60 40 39 21 39 41 25
16 0 0 40 39 11 23 30 13 41 -60 41 8 24 40 10 16
15 0 0 41 8 14 23 30 23 42 -59 41 37 33 40 39 14
14 0 0 41 37 23 23 30 32 42 -59 42 6 48 41 8 17
13 0 0 42 6 36 23 30 41 42 -59 42 36 7 41 37 25
12 0 0 42 35 53 23 30 50 43 -58 43 5 29 42 6 36
11 0 0 43 5 12 23 30 59 43 -58 43 34 54 42 35 50
10 0 0 43 34 33 23 31 9 43 -57 44 4 20 43 5 5
9 0 0 44 3 54 23 31 18 43 -57 44 33 46 43 34 22
8 0 0 44 33 15 23 31 27 43 -56 45 3 12 44 3 38
7 0 0 45 2 35 23 31 36 43 -56 45 32 37 44 32 53
6 0 0 45 31 53 23 31 45 44 -55 46 1 60 45 2 7
5 0 0 46 1 8 23 31 54 44 -54 46 31 19 45 31 17
4 0 0 46 30 18 23 32 3 44 -54 47 0 33 46 0 24
3 0 0 46 59 24 23 32 12 44 -53 47 29 43 46 29 25
2 0 0 47 28 24 23 32 21 44 -53 47 58 47 46 58 22
1 0 0 47 57 17 23 32 30 44 -52 48 27 43 47 27 11
0 0 0 48 26 2 23 32 39 44 -51 48 56 32 47 55 53
- 1 0 0 48 54 39 23 32 47 44 -51 49 25 12 48 24 27
- 2 0 0 49 23 7 23 32 56 44 -50 49 53 43 48 52 52
- 3 0 0 49 51 24 23 33 5 43 -49 50 22 2 49 21 7
- 4 0 0 50 19 30 23 33 13 43 -49 50 50 11 49 49 11
- 5 0 0 50 47 25 23 33 21 43 -48 51 18 7 50 17 4
- 6 0 0 51 15 7 23 33 30 43 -47 51 45 51 50 44 44
- 7 0 0 51 42 35 23 33 38 43 -47 52 13 21 51 12 11
- 8 0 0 52 9 49 23 33 46 43 -46 52 40 36 51 39 24
- 9 0 0 52 36 49 23 33 54 42 -45 53 7 37 52 6 23
- 10 0 0 53 3 33 23 34 2 42 -45 53 34 21 52 33 6
- 11 0 0 53 30 1 23 34 9 42 -44 54 0 49 52 59 34
- 12 0 0 53 56 12 23 34 17 42 -43 54 27 0 53 25 45
- 13 0 0 54 22 6 23 34 24 41 -43 54 52 54 53 51 39
- 14 0 0 54 47 42 23 34 32 41 -42 55 18 29 54 17 16
........................... 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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