IOTA/IOTA-ES occultation update for
(483) Seppina / UCAC2 32899392 = GSC 0420-00280 on June 23/24, 2005
N Bulgaria, frm. Yugoslavia, middle Italy,
very S France, N Spain and N Portugal
Summary
In the night of June 23/24, 2005 a faint 11.9 mag star UCAC2 32899392 = GSC 0420-00280 will be occulted by a 74 km asteroid (483) Seppina. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.
The updated path shows ~0.5 path width north shift with time 0.3 minutes later compared to Edwin Goffin's nominal prediction.
Updated path runs over N Bulgaria ~0:48.6 UT, frm. Yugoslavia around 0:49.0 UT, middle Italy ~0:49.7 UT, very S France ~0:50.5 UT, N Spain ~0:51.0 UT and N Portugal ~0:51.6 UT. Please check the path chart for details.
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The event at one glimpse:
* date and approx. UT time of event: June 24, 2005 @ 00:50 UT (Europe)
* magnitude of target star: 11.9
* magnitude drop [mag]: 1.7
* estimated maximum duration [s]: 5.8
* approx. V mag of minor planet at event [mag]: 13.4
* geocentric parallax of minor planet ["]: 3.700
* apparent motion of minor planet ["/h]: 26.42
* angular distance to moon, phase of moon [deg,%]: 44, 95%
* Goffin's original chart reference: A05_0647
The occultation path with path maps:
* approximate ground width [km]: 95
* uncertainty [path widths]: 1.3
* uncertainty in time [s]: 21
* 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 NE Ophiuchus, about 30' NNE of 3.7 mag star gamma Ophiuchi = SAO 122754.
!!! 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 32899392 = GSC 0420-00280
* constellation: Ophiuchus
* J2000 position [h,m,s; o,',"]: 17h 48m 27.3550s; +03d 07' 42.353"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.027" (0.019", 0.019")
* V mag [mag]: 11.89 (ASAS)
* B-V [mag]: +0.8 approx.
* remarks:
Data for the minor planet:
* general information:
number, name: (483) Seppina
approx. diameter [km]: 74
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 179 USNO, 7 TMO
number of rejected observations: 0
time covered by the observations: 1998 02 26 - 2005 05 23
estimated positional 2-sigma accuracy at epoch of event ["]: 0.146", 0.042", 91 deg
remarks:
* orbital elements
Semimajor axis = 3.42195138424176
Eccentricity = 0.054618994775110
Inclination = 18.7438196943677 deg
Long. of node = 174.1288690255890 deg
Arg. of pericenter = 151.8547691929752 deg
Mean anomaly = 307.5926360999871 deg
Epoch of elements : MJD 53545.03000000 TDT (Jun 24, 2005, 0.720000 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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