IOTA/IOTA-ES occultation update for
(96) Aegle / UCAC2 46117426 = GSC 2918-01572 on October 3/4, 2005
visible from Africa, Turkey and Russia
Summary
In the morning of night of October 3/4, 2005 a faint 12.1 mag star UCAC2 46117426 = GSC 2918-01572 will be occulted by a 174 km asteroid (96) Aegle. This update is based on USNO/Flagstaff astrometry for the asteroid and UCAC2 star position.
The updated path shows ~0.5 path width north shift with time ~0.1 minutes earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over Africa, Turkey ~0:54 UT and Russa from SW to NE ~0:55 -> ~1:01 UT. Please check the path chart for details.
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The event at one glimpse:
* date and approx. UT time of event: October 04, 2005 @ 00:56 UT (Europe)
* magnitude of target star: 12.1
* magnitude drop [mag]: 1.5
* estimated maximum duration [s]: 18.1
* approx. V mag of minor planet at event [mag]: 13.3
* geocentric parallax of minor planet ["]: 3.284
* apparent motion of minor planet ["/h]: 17.75
* angular distance to moon, phase of moon [deg,%]: 112, 0%
* Goffin's original chart reference: A05_1017
The occultation path with path maps:
* approximate ground width [km]: 180
* uncertainty [path widths]: 1.7
* uncertainty in time [s]: 22
* 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 middle Auriga, about 5.4 degrees SSE of 0.2 mag star alpha Aurigae = SAO 40186.
!!! 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 46117426 = GSC 2918-01572
* constellation: Auriga
* J2000 position [h,m,s; o,',"]: 05h 31m 14.8621s; +41d 19' 32.217"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.016", 0.016"
* V mag [mag]: 12.11 (averaged NSVS V-mag)
* B-V [mag]: +?.?
* remarks:
Data for the minor planet:
* general information:
number, name: (96) Aegle
approx. diameter [km]: 174
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 149 USNO, 32 TMO
number of rejected observations: 0
time covered by the observations: 1998 06 28 - 2004 12 20
estimated positional 2-sigma accuracy at epoch of event ["]: 0.150", 0.038", 95 deg
remarks:
* orbital elements
Semimajor axis = 3.05855355174130
Eccentricity = 0.131925960644771
Inclination = 15.9353228785628 deg
Long. of node = 321.8163267663738 deg
Arg. of pericenter = 206.8382465121355 deg
Mean anomaly = 271.4488480842753 deg
Epoch of elements : MJD 53647.04000000 TDT (Oct 4, 2005, 0.960000 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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