IOTA/IOTA-ES occultation update for
(483) Seppina / TYC 0420-01701-1 on June 19/20, 2005
S Russia, S Ukraine, Moldova, Romania, S Hungary, Slovenia,
S Austria, N Italy, S Switzerland and middle France
Summary
In the night of June 19/20, 2005 a faint 11.4 mag star TYC 0420-01701-1 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 no path shift with time 0.2 minutes later compared to Edwin Goffin's nominal prediction.
Updated path runs over S Russia ~23:04.4 UT, S Ukraine ~23:05.1 UT with Odessa in path, Moldova ~23:05.6 UT, Romania ~23:06.0 UT, S Hungary ~23:06.6 UT, Slovenia ~23:07.0 UT, S Austria ~23:07.0 UT, N Italy ~23:07.5 UT, S Switzerland ~23:07.7 UT and middle France around 23:08.2 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 19, 2005 @ 23:07 UT (Europe)
* magnitude of target star: 12.4
* magnitude drop [mag]: 2.2
* 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]: 26.56
* angular distance to moon, phase of moon [deg,%]: 41, 93%
* Goffin's original chart reference: A05_0646
The occultation path with path maps:
* approximate ground width [km]: 100
* uncertainty [path widths]: 1.3
* uncertainty in time [s]: 22
* map: Overview
European part - East
European part - West
* 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 1 degree ENE 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: TYC 0420-01701-1
* constellation: Ophiuchus
* J2000 position [h,m,s; o,',"]: 17h 51m 20.1636s; +03d 09' 50.088"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.025" (0.017", 0.019")
* V mag [mag]: 11.37
* B-V [mag]: +1.02
* 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 = 3.42194799342987
Eccentricity = 0.054616351629920
Inclination = 18.7438191429413 deg
Long. of node = 174.1288940247821 deg
Arg. of pericenter = 151.8539004126427 deg
Mean anomaly = 306.9594788196408 deg
Epoch of elements : MJD 53540.96000000 TDT (Jun 19, 2005, 23.040000 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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