Update for (179) Klytaemnestra - November 4/5, 2000
Update computed by Jan Manek; issued 31 Oct 2000 12:50:20 +0100 (CET)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(179) Klytaemnestra / TYC 1816-00496-1 on November 4/5, 2000
visible from SE Europe, NW Africa, Canary Islands and
N Guyana, SE Venezuela, SE Colombia, NW Peru and SE Ecuador
Summary
In the night of November 4/5, 2000 a 9.3 mag star TYC 1816-00496-1 =
PPM 93491 will be occulted by a 81 km asteroid (179) Klytaemnestra. This
update is based on USNO/Flagstaff astrometry for the asteroid and Tycho-2
star position.
The updated path shows ~1 path width north shift with time ~0.2 minutes earlier compared to
Edwin Goffin's nominal prediction.
The path of this occultation runs over southern coast of Turkey ~2:12 UT,
southern Greece ~2:13.5 UT, Malta ~2:14.5 UT, Tunisia, Algeria, Morocco and
over Canary Islands (Teide Observatory) ~2:19.5 UT. After crossing Atlantic
Ocean path runs over N Guyana ~2:26.9 UT, SE Venezuela ~2:27.5 UT, SE Colombia
~2:28 UT, NW Peru and SE Ecuador around 2:29 UT.
The event at one glimpse:
* date and approx. UT time of event: November 5, 2000 @ 02:13 UT (Euro)
02:28 UT (S.Am.)
* magnitude of target star: 9.3
* magnitude drop [mag]: 3.1
* estimated maximum duration [s]: 8.2
* path description: given above
* Goffin's original chart reference: A00_1106
The occultation path:
* approximate ground width [km]: 85
* uncertainty [path widths]: 1.5
* uncertainty in time [s]: 15
* 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 93491 = TYC 1816-00496-1
* constellation: Taurus
* J2000 position [h,m,s; o,',"]: 04h 23m 59.770s; +24o 14' 23.56"
* position source: Tycho-2
* estimated accuracy ["]: 0.04" (0.02", 0.03")
* V mag [mag]: 9.32
* B-V [mag]: +1.21
* remarks:
Target star is in middle Taurus, about 8 degrees NNW of Aldebaran or
8 degrees east of famous open cluster M45 (Seven sisters). Target star
is 3.5' south of double star 62 Tauri = SAO 76590/1 = STF 534
(6.3mag + 8.1 mag; PA=291, distance 29").
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
Data for the minor planet:
* general information:
number, name: (179) Klytaemnestra
approx. diameter [km]: 81
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone)
number of used observations: 52 USNO
number of rejected observations: 2 USNO
time covered by the observations: 1998 02 12 - 2000 10 18
rms residuals ["] (RA,DE): 0.07", 0.06"
estimated positional accuracy at epoch of event ["]: 0.07"
remarks: Although only 2 positions needed to be rejected, good orbit
solution was obtained only after rejecting all 1998 positions.
Data for the event:
* UT date and time of least geocentric approach: 02:19.1 UT
* approx. V mag of minor planet at event [mag]: 12.3
* geocentric parallax of minor planet ["]: 4.746
* magnitude drop [mag]: 3.1
* estimated maximum duration [s]: 8.2
* apparent motion of minor planet ["/h]: 26.41
* angular distance to moon, phase of moon [deg,%]: 108, 56%
* remarks:
Calculator(s): Jan Manek
Path coordinates:
Altitude
E. Longitude Latitude U.T. star sun
........ shortened ..........................
o ' " o ' " h m s o o
56 0 0 34 25 25 2 9 60 32 -7
54 0 0 34 45 45 2 10 10 33 -8
52 0 0 35 4 16 2 10 20 35 -10
50 0 0 35 20 60 2 10 31 36 -12
48 0 0 35 35 56 2 10 42 38 -13
46 0 0 35 49 8 2 10 53 40 -15
44 0 0 36 0 34 2 11 5 41 -16
42 0 0 36 10 16 2 11 17 43 -18
40 0 0 36 18 15 2 11 29 44 -20
38 0 0 36 24 32 2 11 42 46 -21
36 0 0 36 29 6 2 11 55 48 -23
34 0 0 36 31 58 2 12 8 49 -24
32 0 0 36 33 10 2 12 22 51 -26
30 0 0 36 32 40 2 12 36 52 -27
28 0 0 36 30 29 2 12 50 54 -29
26 0 0 36 26 38 2 13 4 55 -31
24 0 0 36 21 5 2 13 19 57 -32
22 0 0 36 13 52 2 13 34 58 -34
20 0 0 36 4 57 2 13 49 60 -35
18 0 0 35 54 22 2 14 5 62 -37
16 0 0 35 42 4 2 14 21 63 -38
14 0 0 35 28 4 2 14 37 65 -40
12 0 0 35 12 22 2 14 53 66 -42
10 0 0 34 54 56 2 15 10 68 -43
8 0 0 34 35 47 2 15 27 69 -45
6 0 0 34 14 53 2 15 45 71 -46
4 0 0 33 52 14 2 16 2 72 -48
2 0 0 33 27 50 2 16 20 74 -50
0 0 0 33 1 39 2 16 38 76 -51
- 2 0 0 32 33 41 2 16 57 77 -53
- 4 0 0 32 3 56 2 17 16 79 -55
- 6 0 0 31 32 23 2 17 35 80 -56
- 8 0 0 30 59 1 2 17 54 82 -58
- 10 0 0 30 23 50 2 18 14 83 -60
- 12 0 0 29 46 49 2 18 34 84 -62
- 14 0 0 29 7 59 2 18 54 85 -64
- 16 0 0 28 27 19 2 19 14 85 -65
- 18 0 0 27 44 49 2 19 35 84 -67
- 20 0 0 27 0 30 2 19 56 83 -69
- 22 0 0 26 14 23 2 20 17 82 -71
- 24 0 0 25 26 27 2 20 38 80 -73
- 26 0 0 24 36 44 2 21 00 79 -75
........ shortened ..........................
- 54 0 0 10 16 28 2 25 56 50 -76
- 56 0 0 9 6 6 2 26 15 48 -74
- 58 0 0 7 55 5 2 26 33 46 -71
- 60 0 0 6 43 32 2 26 51 44 -69
- 62 0 0 5 31 36 2 27 9 42 -67
- 64 0 0 4 19 23 2 27 25 39 -65
- 66 0 0 3 7 3 2 27 41 37 -62
- 68 0 0 1 54 45 2 27 56 35 -60
- 70 0 0 0 42 35 2 28 10 32 -58
- 72 0 0 - 0 29 16 2 28 24 30 -56
- 74 0 0 - 1 40 41 2 28 36 28 -53
- 76 0 0 - 2 51 31 2 28 48 26 -51
- 78 0 0 - 4 1 39 2 28 59 23 -49
- 80 0 0 - 5 10 55 2 29 8 21 -46
- 82 0 0 - 6 19 14 2 29 17 19 -44
- 84 0 0 - 7 26 26 2 29 25 17 -42
- 86 0 0 - 8 32 26 2 29 32 14 -40
- 88 0 0 - 9 37 7 2 29 37 12 -37
........ 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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