IOTA/IOTA-ES occultation update for
(814) Tauris / UCAC2 36961808 = GSC 0742-00767 on September 15/16, 2005
visible from N Morocco, SE Spain, Sardinia and S Italy
Summary
In the morning of night September 15/16, 2005 a faint 12.0 mag star UCAC2 36961808 = GSC 0742-00767 will be occulted by a 116 km asteroid (814) Tauris. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.
The updated path shows ~1 path width north shift with time ~0.2 minutes later compared to Edwin Goffin's nominal prediction.
Updated path runs over N Morocco ~4:29.8 UT, SE Spain ~4:30.0 UT, Sardinia ~4:30.8 UT and S Italy ~4:31.2 UT in strong twilight. Please check the path chart for details.
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The event at one glimpse:
* date and approx. UT time of event: September 16, 2005 @ 04:30 UT (Europe)
* magnitude of target star: 12.0
* magnitude drop [mag]: 1.8
* estimated maximum duration [s]: 5.5
* approx. V mag of minor planet at event [mag]: 13.6
* geocentric parallax of minor planet ["]: 3.943
* apparent motion of minor planet ["/h]: 47.18
* angular distance to moon, phase of moon [deg,%]: 124, 95%
* Goffin's original chart reference: A05_0956
The occultation path with path maps:
* approximate ground width [km]: 130
* uncertainty [path widths]: 0.9
* uncertainty in time [s]: 14
* 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 Orion, about 6.9 degrees ESE of 2.0 mag star gamma Geminorum = SAO 95912.
!!! 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 36961808 = GSC 0742-00767
* constellation: Orion
* J2000 position [h,m,s; o,',"]: 06h 10m 13.0088s; +14d 31' 16.123"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.028" (0.020", 0.020")
* V mag [mag]: 12.0 (averaged ASAS3 V-mag)
* B-V [mag]: +?.?
* remarks:
Data for the minor planet:
* general information:
number, name: (814) Tauris
approx. diameter [km]: 116
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 138 USNO, 37 TMO
number of rejected observations: 0
time covered by the observations: 1998 04 23 - 2004 10 09
estimated positional 2-sigma accuracy at epoch of event ["]: 0.178", 0.030", 65 deg
remarks:
* orbital elements
Semimajor axis = 3.15088641055878
Eccentricity = 0.309376264553826
Inclination = 21.8337902692898 deg
Long. of node = 88.8592417687305 deg
Arg. of pericenter = 297.1365458666262 deg
Mean anomaly = 20.3308976697425 deg
Epoch of elements : MJD 53629.19000000 TDT (Sep 16, 2005, 4.560000 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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