Update for (223) Rosa - December 24/25, 2000
Update computed by Jan Manek; issued 19 Dec 2000 23:00:20 +0100 (CET)
Jan Manek's update
IOTA/IOTA-ES occultation update for
(223) Rosa / TYC 1926-01137-1 on December 24/25, 2000
visible from S Ukraine, N Moldova, Slovakia, Czechia,
S Germany, Luxembourg, SE Belgium and north France
Summary
In the Christmas night of December 24/25, 2000 a 10.0 mag star
TYC 1926-01137-1 will be occulted by a 91 km asteroid (223) Rosa.
This update is based on USNO/Flagstaff and TMO astrometry for the
asteroid and Tycho-2 star position.
The updated path shows no path shift with time ~0.7 minutes later compared to
Edwin Goffin's nominal prediction.
The path of this occultation runs (besides Asia) over S Ukraine ~22:55 UT,
N Moldova and N Romania ~22:56 UT, Slovakia ~22:56.8 UT, mid-south Czechia
~22:57.5 UT, S Germany ~22:58 UT, Luxembourg amd SE Belgium ~22:58.5 UT and
north France around 22:59 UT with Paris just south of shadow path.
Within path uncertainties are also south Poland, N Hungary, N Austria, whole
Slovakia, Czechia and Belguium, south Netherlands and south England. Please check the path chart for details.
This event seems to be promising, it may be a nice gift under the Christmas tree.
Best wishes, nice Christmas time and clear sky. Jan.
The event at one glimpse:
* date and approx. UT time of event: December 24, 2000 @ 22:46 UT (China)
22:57 UT (Euro)
* magnitude of target star: 10.0
* magnitude drop [mag]: 3.7
* estimated maximum duration [s]: 10.3
* path description: given above
* Goffin's original chart reference: A00_1217
The occultation path:
* approximate ground width [km]: 100
* uncertainty [path widths]: 1.8
* 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: TYC 1926-01137-1
* constellation: Gemini
* J2000 position [h,m,s; o,',"]: 07h 58m 03.209s; +23o 17' 19.20"
* position source: Tycho-2
* estimated accuracy ["]: 0.03" (0.02", 0.03")
* V mag [mag]: 9.97
* B-V [mag]: +0.31
* remarks:
Target star is in SW Gemini, on border with Cancer, about 5.5 degrees
SSW of 1.2 mag star beta Geminorum = Pollux = SAO 79666 or ~3.3 degrees
WWS of 3.6 mag star kappa Geminorum = SAO 79653. Only 24' west of target
is 6.9 mag star SAO 79847.
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: (223) Rosa
approx. diameter [km]: 91
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 43 USNO, 6 TMO
number of rejected observations: 5 USNO
time covered by the observations: 1998 06 07 - 2000 12 17
rms residuals ["] (RA,DE): 0.08", 0.09"
estimated positional accuracy at epoch of event ["]: 0.09"
remarks:
Data for the event:
* UT date and time of least geocentric approach: 22:52.5 UT
* approx. V mag of minor planet at event [mag]: 13.7
* geocentric parallax of minor planet ["]: 4.954
* magnitude drop [mag]: 3.7
* estimated maximum duration [s]: 10.3
* apparent motion of minor planet ["/h]: 24.77
* angular distance to moon, phase of moon [deg,%]: 148, 1%
* remarks:
Calculator(s): Jan Manek
Path coordinates:
Altitude
E. Longitude Latitude U.T. star sun
........ shortened ..........................
o ' " o ' " h m s o o
108 0 0 19 29 42 22 43 15 32 -9
104 0 0 21 36 12 22 43 46 36 -13
100 0 0 23 41 33 22 44 20 40 -17
96 0 0 25 44 53 22 44 57 43 -21
92 0 0 27 45 25 22 45 35 47 -25
88 0 0 29 42 25 22 46 14 50 -28
84 0 0 31 35 17 22 46 55 54 -32
80 0 0 33 23 27 22 47 36 57 -35
76 0 0 35 6 30 22 48 17 60 -39
72 0 0 36 44 5 22 48 58 62 -42
68 0 0 38 15 57 22 49 39 64 -45
64 0 0 39 41 54 22 50 20 66 -48
60 0 0 41 1 51 22 50 60 67 -50
56 0 0 42 15 44 22 51 39 68 -53
52 0 0 43 23 34 22 52 17 68 -55
48 0 0 44 25 22 22 52 54 68 -57
44 0 0 45 21 14 22 53 30 68 -59
40 0 0 46 11 15 22 54 5 67 -60
38 0 0 46 34 5 22 54 23 66 -61
36 0 0 46 55 30 22 54 40 66 -62
34 0 0 47 15 30 22 54 56 65 -62
32 0 0 47 34 6 22 55 13 64 -63
30 0 0 47 51 19 22 55 29 64 -63
28 0 0 48 7 9 22 55 45 63 -63
26 0 0 48 21 37 22 56 1 62 -64
24 0 0 48 34 45 22 56 16 61 -64
22 0 0 48 46 31 22 56 31 60 -64
20 0 0 48 56 58 22 56 47 59 -64
18 0 0 49 6 5 22 57 1 58 -64
16 0 0 49 13 53 22 57 16 57 -64
14 0 0 49 20 22 22 57 30 56 -64
12 0 0 49 25 33 22 57 44 55 -64
10 0 0 49 29 26 22 57 58 54 -64
8 0 0 49 32 0 22 58 12 53 -63
6 0 0 49 33 17 22 58 26 52 -63
4 0 0 49 33 16 22 58 39 51 -62
2 0 0 49 31 56 22 58 52 50 -62
0 0 0 49 29 18 22 59 5 49 -61
- 2 0 0 49 25 22 22 59 18 47 -61
- 4 0 0 49 20 6 22 59 31 46 -60
- 6 0 0 49 13 32 22 59 43 45 -59
- 8 0 0 49 5 37 22 59 55 44 -59
- 10 0 0 48 56 22 23 0 7 43 -58
- 12 0 0 48 45 46 23 0 19 42 -57
- 14 0 0 48 33 48 23 0 31 40 -56
- 16 0 0 48 20 27 23 0 42 39 -55
- 18 0 0 48 5 43 23 0 53 38 -54
- 20 0 0 47 49 34 23 1 4 37 -53
........ 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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