Update for (590) Tomyris - May 4/5, 2000
Update computed by Jan Manek; issued 28 Apr 2000 08:45:00 +0200 (CEST)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(590) Tomyris / HIP 69631 = SAO 120368 event on May 4/5, 2000
visible from N Iran, N Iraque, N Syria, S Turkey, Greece, S Albania,
S Italy, Pyreney (France/Spain border) & N Spain in Europe and
Newfoundland in North America
Summary
In the night of May 4/5, 2000 a ~8.2 mag star HIP 69631 = SAO 120368 will
be occulted by a small 41 km asteroid (590) Tomyris. This update is based
on USNO/Flagstaff and TMO astrometry for the asteroid and Hipparcos star
position.
The updated path shows no shift with time ~0.3 minutes earlier compared to
Edwin Goffin's nominal prediction.
The path of this occultation runs over N Iran ~0:13.5 UT, N Iraque ~0:14 UT,
N Syria ~0:14.5 UT, S Turkey ~0:15 UT, Greece ~0:16 UT, S Albania ~0:16.3 UT,
S Italy 0:16.7 UT, S Corse and N Sardegna ~0:17.4 UT, Pyreney mountains
(France/Spain border) with Pic du Midi in path & N Spain ~0:18.5 UT
in Europe. After crossing Atlantic ocean path runs over Newfoundland
~0:23.5 UT.
Keep in mind the 3.5 path width uncertainity - angular diameter of asteroid
is very small. As the expected duration is around 3 seconds only, be as accurate
as possible in timing the event.
The event at one glimpse:
* date and approx. UT time of event: May 5, 2000 @ 00:18 UT (Euro)
00:24 UT (N.Am.)
* magnitude of target star: 8.2
* magnitude drop [mag]: 6.5
* estimated maximum duration [s]: 3.3
* path description: given above
* Goffin's original chart reference: A00_0523
The occultation path:
* approximate ground width [km]: 55
* uncertainty [path widths]: 3.5
* 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: HIP 69631 = PPM 160477 = SAO 120368 = TYC 0320-00994-1
* constellation: Virgo
* J2000 position [h,m,s; o,',"]: 14h 15m 03.243s; +02o 47' 47.54"
* position source: Hipparcos
* estimated accuracy ["]: 0.01 (0.01", 0.01")
* V mag [mag]: 8.18
* B-V [mag]: +0.50
* remarks:
Target star is in eastern Virgo, ~16.5 degrees almost exactly south
of a zero magnitude star alpha Boo = Arcturus. There is 5.0 mag star
SAO 120339 (variable CU Vir) ~48' SW of target and pair of ~7mag stars
SAO 120364 + SAO 120370 about 0.5 degree north of target.
Close finding chart (prepared in GUIDE7):
* occulted star is in center - labeled with cross
* field is 3.0x3.0 degrees
* limiting magnitude is 12.5
* labeled stars have indicated SAO numbers
Data for the minor planet:
* general information:
number, name: (590) Tomyris
approx. diameter [km]: 41
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 40 USNO, 3 TMO
number of rejected observations: 2 USNO
time covered by the observations: 1998 11 04 - 2000 04 27
rms residuals ["] (RA,DE): 0.08", 0.08"
estimated positional accuracy at epoch of event ["]: 0.08"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 00:19.0 UT
* approx. V mag of minor planet at event [mag]: 14.6
* geocentric parallax of minor planet ["]: 4.062
* magnitude drop [mag]: 6.5
* estimated maximum duration [s]: 3.3
* apparent motion of minor planet ["/h]: 28.74
* angular distance to moon, phase of moon [deg,%]: 153, 1%
* remarks:
Calculator(s): Jan Manek
Path coordinates:
Altitude
E. Longitude Latitude U.T. star sun
o ' " o ' " h m s o o
........ shortened ..........................
62 0 0 34 16 47 0 13 1 14 -9
60 0 0 34 28 10 0 13 6 16 -11
58 0 0 34 40 5 0 13 11 17 -12
56 0 0 34 52 30 0 13 17 19 -13
54 0 0 35 5 24 0 13 24 21 -15
52 0 0 35 18 45 0 13 31 22 -16
50 0 0 35 32 34 0 13 38 24 -17
48 0 0 35 46 47 0 13 46 25 -18
46 0 0 36 1 25 0 13 54 27 -19
44 0 0 36 16 26 0 14 3 28 -20
42 0 0 36 31 48 0 14 12 29 -22
40 0 0 36 47 30 0 14 21 31 -23
38 0 0 37 3 31 0 14 31 32 -23
36 0 0 37 19 49 0 14 41 33 -24
34 0 0 37 36 24 0 14 52 35 -25
32 0 0 37 53 13 0 15 2 36 -26
30 0 0 38 10 16 0 15 14 37 -27
29 0 0 38 18 51 0 15 19 38 -27
28 0 0 38 27 30 0 15 25 38 -27
27 0 0 38 36 11 0 15 30 39 -28
26 0 0 38 44 55 0 15 36 39 -28
25 0 0 38 53 41 0 15 42 40 -28
24 0 0 39 2 29 0 15 48 40 -29
23 0 0 39 11 19 0 15 54 41 -29
22 0 0 39 20 11 0 15 60 41 -29
21 0 0 39 29 4 0 16 6 42 -29
20 0 0 39 37 59 0 16 12 42 -30
19 0 0 39 46 55 0 16 18 43 -30
18 0 0 39 55 52 0 16 24 43 -30
17 0 0 40 4 50 0 16 30 44 -30
16 0 0 40 13 49 0 16 37 44 -30
15 0 0 40 22 48 0 16 43 44 -30
14 0 0 40 31 48 0 16 49 45 -31
13 0 0 40 40 48 0 16 56 45 -31
12 0 0 40 49 48 0 17 2 46 -31
11 0 0 40 58 48 0 17 8 46 -31
10 0 0 41 7 47 0 17 15 46 -31
9 0 0 41 16 46 0 17 21 46 -31
8 0 0 41 25 45 0 17 27 47 -31
7 0 0 41 34 42 0 17 34 47 -31
6 0 0 41 43 39 0 17 40 47 -31
5 0 0 41 52 35 0 17 47 47 -31
4 0 0 42 1 30 0 17 53 48 -31
3 0 0 42 10 23 0 17 60 48 -31
2 0 0 42 19 14 0 18 6 48 -31
1 0 0 42 28 4 0 18 12 48 -31
0 0 0 42 36 52 0 18 19 48 -31
- 1 0 0 42 45 38 0 18 25 48 -31
- 2 0 0 42 54 22 0 18 32 49 -31
- 3 0 0 43 3 3 0 18 38 49 -31
- 4 0 0 43 11 42 0 18 45 49 -31
- 5 0 0 43 20 19 0 18 51 49 -31
- 6 0 0 43 28 52 0 18 58 49 -30
- 7 0 0 43 37 23 0 19 4 49 -30
- 8 0 0 43 45 51 0 19 10 49 -30
- 9 0 0 43 54 16 0 19 17 49 -30
- 10 0 0 44 2 37 0 19 23 49 -30
- 11 0 0 44 10 55 0 19 29 49 -29
- 12 0 0 44 19 10 0 19 36 49 -29
- 13 0 0 44 27 21 0 19 42 48 -29
- 14 0 0 44 35 28 0 19 48 48 -29
- 15 0 0 44 43 31 0 19 54 48 -29
- 16 0 0 44 51 30 0 20 1 48 -28
........ shortened ..........................
- 49 0 0 48 26 11 0 23 1 36 -15
- 50 0 0 48 30 55 0 23 5 35 -15
- 51 0 0 48 35 33 0 23 10 35 -14
- 52 0 0 48 40 4 0 23 14 34 -14
- 53 0 0 48 44 28 0 23 19 34 -13
- 54 0 0 48 48 45 0 23 23 33 -13
- 55 0 0 48 52 54 0 23 27 33 -12
- 56 0 0 48 56 57 0 23 31 32 -12
- 57 0 0 49 0 52 0 23 35 32 -11
- 58 0 0 49 4 40 0 23 39 31 -11
- 59 0 0 49 8 20 0 23 43 31 -10
- 60 0 0 49 11 53 0 23 47 30 -9
- 61 0 0 49 15 19 0 23 51 30 -9
- 62 0 0 49 18 37 0 23 55 29 -8
- 63 0 0 49 21 48 0 23 58 28 -8
- 64 0 0 49 24 51 0 24 2 28 -7
- 65 0 0 49 27 47 0 24 5 27 -7
- 66 0 0 49 30 35 0 24 9 27 -6
- 67 0 0 49 33 15 0 24 12 26 -6
........ 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-|
--------------------------------------------------------------------U---U---
Be sure to use the RELOAD button of your browser,
so you will surely use the latest version of predictions page!
