IOTA/IOTA-ES occultation update for
(1749) Telamon / TYC 6746-00571-1 = SAO 182823 on May 6/7, 2004
visible from equatoreal Africa
Summary
In the night of May 6/7, 2004 a bright 8.7 mag star TYC 6746-00571-1 = SAO 182823 will be occulted by a 115 km asteroid (1749) Telamon. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and Tycho-2 star position.
The updated path shows ~1" south shift with time ~2 minutes earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over equatoreal Africa ~23:00-23:06 UT. No chance for Europe. Please check the path chart for details.
The event at one glimpse:
* date and approx. UT time of event: May 6, 2004 @ 23:03 UT (Africa)
* magnitude of target star: 8.7
* magnitude drop [mag]: 8.0
* estimated maximum duration [s]: 6.6
* approx. V mag of minor planet at event [mag]: 16.7
* geocentric parallax of minor planet ["]: 1.946
* apparent motion of minor planet ["/h]: 19.03
* angular distance to moon, phase of moon [deg,%]: 31, 93%
* Goffin's original chart reference: A04_0542
The occultation path with path maps:
* approximate ground width [km]: 120
* uncertainty [path widths]: 2.1
* uncertainty in time [s]: 23
* map: Overview
* 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 SE Libra, about 7.1 degrees SSW of 2.7 mag star alpha Librae = SAO 158840.
Northern star in a 1.6' wide pair, other star is SAO 182825 (8.8 mag).
!!! 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 6746-00571-1 = SAO 182823 = PPM 263333
* constellation: Libra
* J2000 position [h,m,s; o,',"]: 14h 44m 18.1314s; -22o 58' 16.381"
* position source: Tycho-2
* estimated accuracy ["]: 0.04" (0.03", 0.03")
* V mag [mag]: 8.69
* B-V [mag]: +1.16
* remarks:
Data for the minor planet:
* general information:
number, name: (1749) Telamon
approx. diameter [km]: 115
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 98 USNO, 6 TMO
number of rejected observations: 0
time covered by the observations: 1998 09 16 - 2004 04 21
rms residuals ["] (RA,DE): 0.18", 0.18"
estimated positional accuracy at epoch of event ["]: 0.12", 0.07"
remarks:
Path coordinates: click here
Calculator(s): Jan Manek
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Jan Manek
Stefanik Observatory Private :
Petrin 205 Werichova 950
118 46 Praha 1 152 00 Praha 5 - Barrandov |_|_|
Czech Republic Czech Republic / \
Internet : jan.manek AT worldonline.cz |-O-O-|
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