IOTA/IOTA-ES occultation update for
(103) Hera / TYC 6262-00060-1 on September 16/17, 2005
visible from frm. Yugoslavia, S Romania, Bulgaria, N Turkey,
and Caucasus area
Summary
In the evening of night September 16/17, 2005 a faint 11.8 mag star TYC 6262-00060-1 will be occulted by a 95 km asteroid (103) Hera. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.
The updated path shows ~2 path width south shift with time ~0.2 minutes earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over frm. Yugoslavia ~17:28 UT, S Romania ~17:285 UT, Bulgaria ~17:28.8 UT, N Turkey ~17:29.5 UT and Caucasus area ~17:30.2 UT. Please check the path chart for details.
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Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: September 16, 2005 @ 17:29 UT (Europe)
* magnitude of target star: 11.8
* magnitude drop [mag]: 1.2
* estimated maximum duration [s]: 6.1
* approx. V mag of minor planet at event [mag]: 12.5
* geocentric parallax of minor planet ["]: 3.949
* apparent motion of minor planet ["/h]: 34.76
* angular distance to moon, phase of moon [deg,%]: 66, 97%
* Goffin's original chart reference: A05_0922
The occultation path with path maps:
* approximate ground width [km]: 230
* uncertainty [path widths]: 0.8
* uncertainty in time [s]: 6
* 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 NW Sagittarius, about 2 degrees SSW of 5.5 mag open cluster M23.
!!! 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 6262-00060-1
* constellation: Sagittarius
* J2000 position [h,m,s; o,',"]: 17h 54m 29.1712s; -20d 55' 12.891"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.029" (0.021", 0.020")
* V mag [mag]: 11.8 (averaged ASAS3 V-mag)
* B-V [mag]: +0.5 (Tyc2)
* remarks:
Data for the minor planet:
* general information:
number, name: (103) Hera
approx. diameter [km]: 95
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 199 USNO, 23 TMO
number of rejected observations: 0
time covered by the observations: 1998 11 04 - 2005 07 16
estimated positional 2-sigma accuracy at epoch of event ["]: 0.030", 0.022", 96 deg
remarks:
* orbital elements
Semimajor axis = 2.70193216447205
Eccentricity = 0.079324666563277
Inclination = 5.4214688740587 deg
Long. of node = 136.2824207222871 deg
Arg. of pericenter = 190.0889725069595 deg
Mean anomaly = 330.5676245473646 deg
Epoch of elements : MJD 53629.73000000 TDT (Sep 16, 2005, 17.520000 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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