IOTA/IOTA-ES occultation update for
(573) Recha / UCAC2 43227495 = GSC 2375-03203 on September 26/27, 2005
visible from Africa, Greece, W Bulgaria, Romania, W Ukraine,
E Belarus and NW Russia
Summary
In the night of September 26/27, 2005 a faint 12.3 mag star UCAC2 43227495 = GSC 2375-03203 will be occulted by a 51 km asteroid (573) Recha. This update is based on USNO/Flagstaff astrometry for the asteroid and UCAC2 star position.
The updated path shows ~15 path width east shift with time ~1.7 minutes earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over Africa, Greece ~2:20.5 UT, W Bulgaria ~2:21.5 UT, Romania ~2:22.4 UT, W Ukraine ~2:23.5 UT, E Belarus ~2:24.5 UT and NW Russia ~2:25-2:29 UT. Please check the path chart for details.
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The event at one glimpse:
* date and approx. UT time of event: September 27, 2005 @ 02:24 UT (Europe)
* magnitude of target star: 11.5
* magnitude drop [mag]: 2.9
* estimated maximum duration [s]: 7.9
* approx. V mag of minor planet at event [mag]: 14.3
* geocentric parallax of minor planet ["]: 4.162
* apparent motion of minor planet ["/h]: 15.19
* angular distance to moon, phase of moon [deg,%]: 47, 33%
* Goffin's original chart reference: A05_0942
The occultation path with path maps:
* approximate ground width [km]: 55
* uncertainty [path widths]: 5.5
* uncertainty in time [s]: 16
* map: Overview
European part
* remarks: Path uncertainties [2 sigmas] are given according to nominal star
position errors and expected asteroid positional accuracy.
Elements for WinOccult - use 'Save as ...' to download and save these elements.
Finding charts (prepared in GUIDE8):
* occulted star is in center - labeled with cross
* labeled stars have indicated SAO numbers
* (smaller) square box shows 30' field in all wider field charts
* (larger) square box shows 3° field in wide field charts
* remarks:
Target star is in south Perseus, about 4.0 degrees ENE of 2.9 mag star zeta Persei = SAO 56799.
!!! IMPORTANT !!!
Purple stars in identification chart are so called 'non-star' objects in GSC; in dense fields
the 'non-stars' are often real stars or blends of close pairs. Be careful about this.
40-degree chart
3-degree chart
0.5-degree chart
Data for the target star:
* name: UCAC2 43227495 = GSC 2375-03203
* constellation: Perseus
* J2000 position [h,m,s; o,',"]: 04h 12m 32.1374s; +32d 47' 12.837"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.024" (0.017", 0.017")
* V mag [mag]: 11.48 (GSC magnitude)
* B-V [mag]: +?.?
* remarks:
Data for the minor planet:
* general information:
number, name: (573) Recha
approx. diameter [km]: 51
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone)
number of used observations: 137 USNO
number of rejected observations: 0
time covered by the observations: 1998 03 10 - 2004 11 09
estimated positional 2-sigma accuracy at epoch of event ["]: 0.180", 0.050", 100 deg
remarks:
* orbital elements
Semimajor axis = 3.01197079213649
Eccentricity = 0.116863358953421
Inclination = 9.8364017552910 deg
Long. of node = 343.0442776358433 deg
Arg. of pericenter = 30.7754419086800 deg
Mean anomaly = 27.1793572824661 deg
Epoch of elements : MJD 53640.10000000 TDT (Sep 27, 2005, 2.400000 h)
Path coordinates: click here
Calculator(s): Jan Manek
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Jan Manek
Werichova 950
152 00 Praha 5 - Barrandov |_|_|
Czech Republic / \
Internet : jan.manek AT worldonline.cz |-O-O-|
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