Update for (859) Bouzareah - April 7, 2000
Update computed by Jan Manek; issued 03 Apr 2000 14:02:00 +0200 (CEST)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(859) Bouzareah / TYC 5557-00709-1 event on April 7, 2000
visible from S Thailand, Sri Lanka, S India and middle Africa
Summary
In the night of April 7, 2000 a ~9.6 mag star TYC 5557-00709-1 = PPM 228273
will be occulted by a 77 km asteroid (859) Bouzareah. This update is based on
USNO/Flagstaff astrometry for the asteroid and Tycho-2 star position.
The updated path shows extremely large ~1.1" southern shift with time
~1.9 minutes later compared to
Edwin Goffin's nominal prediction.
This puts the path completely off the European continent.
The path of this occultation runs over S Thailand ~22:42 UT, Sri Lanka at
22:43.5 UT and very southern India 22:43.7 UT. Later path runs over middle
Africa but no details are given in this note.
The event at one glimpse:
* date and approx. UT time of event: April 7, 2000 @ 22:43 UT (India)
* magnitude of target star: 9.6
* magnitude drop [mag]: 5.2
* estimated maximum duration [s]: 5.3
* path description: given above
* Goffin's original chart reference: A00_0432
The occultation path:
* approximate ground width [km]: 85
* uncertainty [path widths]: 3.0
* uncertainty in time [s]: 20
* map: below
* remarks: Path uncertainities are given according to nominal star
position errors and expected asteroid positional accuracy.
!!!!!!!
Circles along path indicates the centerline for this event.
They are more accurate than the path limit lines.
!!!!!!!
Data for the target star:
* name: PPM 228273 = SAO 139730 = TYC 5557-00709-1
* constellation: Virgo
* J2000 position [h,m,s; o,',"]: 14h 05m 42.930s; -10o 10' 02.87"
* position source: Tycho-2
* estimated accuracy ["]: 0.03 (0.02", 0.03")
* V mag [mag]: 9.56
* B-V [mag]: +1.06
* remarks:
Target star is in SE Virgo, about 10 degrees east of 1.1 mag star
alpha Virginis = Spica or 1.8 degrees west of 4.2 mag star kappa
Virginis = SAO 158427. Only 13' ENE of target is 9.0 mag red star
SAO 139735.
Close finding chart (prepared in GUIDE7):
* occulted star is in center - labeled with cross
* field is 4.0x4.0 degrees
* limiting magnitude is 12.5
* labeled stars have indicated SAO numbers
Data for the minor planet:
* general information:
number, name: (859) Bouzareah
approx. diameter [km]: 77
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone)
number of used observations: 24 USNO
number of rejected observations: 6 USNO
time covered by the observations: 1998 12 11 - 2000 03 27
rms residuals ["] (RA,DE): 0.10", 0.07"
estimated positional accuracy at epoch of event ["]: 0.10"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 22:48.3 UT
* approx. V mag of minor planet at event [mag]: 14.8
* geocentric parallax of minor planet ["]: 3.428
* magnitude drop [mag]: 5.2
* estimated maximum duration [s]: 5.3
* apparent motion of minor planet ["/h]: 28.12
* angular distance to moon, phase of moon [deg,%]: 153, 12%
* remarks:
Calculator(s): Jan Manek
Path coordinates:
Altitude
E. Longitude Latitude U.T. star sun
o ' " o ' " h m s o o
........ shortened ..........................
o ' " o ' " h m s o o
104 0 0 10 51 16 22 41 53 18 -5
102 0 0 10 36 20 22 41 58 20 -6
100 0 0 10 22 12 22 42 4 22 -8
98 0 0 10 8 54 22 42 10 24 -10
96 0 0 9 56 27 22 42 17 25 -12
94 0 0 9 44 50 22 42 24 27 -14
92 0 0 9 34 4 22 42 32 29 -16
90 0 0 9 24 11 22 42 40 31 -18
88 0 0 9 15 10 22 42 48 33 -20
86 0 0 9 7 2 22 42 57 35 -22
84 0 0 8 59 48 22 43 6 37 -24
82 0 0 8 53 28 22 43 16 39 -26
80 0 0 8 48 2 22 43 26 41 -28
78 0 0 8 43 30 22 43 37 42 -30
76 0 0 8 39 53 22 43 48 44 -32
74 0 0 8 37 10 22 43 59 46 -33
72 0 0 8 35 22 22 44 10 48 -35
70 0 0 8 34 28 22 44 22 49 -37
68 0 0 8 34 29 22 44 34 51 -39
66 0 0 8 35 25 22 44 47 53 -41
64 0 0 8 37 15 22 44 59 54 -43
62 0 0 8 39 59 22 45 12 56 -44
60 0 0 8 43 37 22 45 26 58 -46
58 0 0 8 48 9 22 45 39 59 -48
56 0 0 8 53 34 22 45 53 61 -50
54 0 0 8 59 51 22 46 7 62 -52
52 0 0 9 7 1 22 46 21 63 -53
50 0 0 9 15 3 22 46 35 64 -55
48 0 0 9 23 56 22 46 49 66 -57
46 0 0 9 33 40 22 47 3 67 -58
44 0 0 9 44 13 22 47 18 67 -60
42 0 0 9 55 36 22 47 32 68 -61
40 0 0 10 7 48 22 47 47 69 -63
38 0 0 10 20 47 22 48 2 69 -64
36 0 0 10 34 32 22 48 16 69 -65
34 0 0 10 49 4 22 48 31 69 -66
32 0 0 11 4 20 22 48 46 69 -67
30 0 0 11 20 21 22 49 1 68 -68
28 0 0 11 37 4 22 49 15 68 -69
26 0 0 11 54 28 22 49 30 67 -69
24 0 0 12 12 33 22 49 44 66 -70
22 0 0 12 31 17 22 49 58 65 -70
20 0 0 12 50 39 22 50 13 64 -70
18 0 0 13 10 37 22 50 27 63 -70
16 0 0 13 31 10 22 50 41 61 -69
14 0 0 13 52 16 22 50 54 60 -69
12 0 0 14 13 55 22 51 8 59 -68
10 0 0 14 36 4 22 51 21 57 -67
8 0 0 14 58 42 22 51 34 55 -66
6 0 0 15 21 46 22 51 47 54 -65
4 0 0 15 45 17 22 51 60 52 -63
2 0 0 16 9 11 22 52 12 50 -62
0 0 0 16 33 26 22 52 24 49 -61
- 2 0 0 16 58 2 22 52 36 47 -59
- 4 0 0 17 22 56 22 52 47 45 -58
- 6 0 0 17 48 6 22 52 58 44 -56
- 8 0 0 18 13 31 22 53 8 42 -54
- 10 0 0 18 39 8 22 53 19 40 -53
- 12 0 0 19 4 55 22 53 28 38 -51
- 14 0 0 19 30 50 22 53 38 36 -49
- 16 0 0 19 56 52 22 53 47 34 -48
- 18 0 0 20 22 58 22 53 55 33 -46
- 20 0 0 20 49 7 22 54 4 31 -44
- 22 0 0 21 15 16 22 54 11 29 -42
- 24 0 0 21 41 23 22 54 19 27 -41
- 26 0 0 22 7 26 22 54 25 25 -39
- 28 0 0 22 33 23 22 54 32 23 -37
- 30 0 0 22 59 13 22 54 38 22 -35
- 32 0 0 23 24 52 22 54 43 20 -33
- 34 0 0 23 50 20 22 54 48 18 -32
- 36 0 0 24 15 35 22 54 52 16 -30
- 38 0 0 24 40 33 22 54 56 14 -28
- 40 0 0 25 5 15 22 54 60 12 -26
- 42 0 0 25 29 37 22 55 3 10 -24
........ shortened ..........................
----------------------------------------------------------------------------
Jan Manek
Stefanik Observatory Private :
Petrin 205 Werichova 950
118 46 Praha 1 152 00 Praha 5 - Barrandov |_|_|
Czech Republic Czech Republic / \
Internet : jmanek@mbox.vol.cz |-O-O-|
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