IOTA/IOTA-ES occultation update for
(566) Stereoskopia / TYC 4970-01009-1 on March 22/23, 2004
visible from Turkey, Greece, Albania, W Croatia, N Italy,
Switzerland, N France, England and Ireland
Summary
In the night of March 22/23, 2004 a faint 10.9 mag star TYC 4970-01009-1 will be occulted by a 175 km asteroid (566) Stereoskopia. This update is based on USNO/Flagstaff, TMO and OACastrometry for the asteroid and UCAC2 star position.
The updated path shows ~0.5 path width north shift with time ~0.3 minutes earlier compared to Edwin Goffin's nominal prediction.
22 March, 2004 @ 00:06 - included astrometry from OAC; no path shift resulted, decreased error in time uncertainty from 15 to 13 seconds.
Updated path runs over Turkey ~2:43.6 UT, Greece ~2:44.6 UT, Albania ~2:44.9 UT, W Croatia ~2:45.5 UT, N Italy ~2:48.0 UT, Switzerland ~2:46.3 UT, N France ~2:46.8 UT, England ~2:47.5 UT and Ireland ~2:48.0 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: March 23, 2004 @ 02:46 UT (Europe)
* magnitude of target star: 10.9
* magnitude drop [mag]: 2.9
* estimated maximum duration [s]: 13.7
* approx. V mag of minor planet at event [mag]: 13.7
* geocentric parallax of minor planet ["]: 3.117
* apparent motion of minor planet ["/h]: 22.56
* angular distance to moon, phase of moon [deg,%]: 175, 5%
* Goffin's original chart reference: A04_0328
The occultation path with path maps:
* approximate ground width [km]: 310
* uncertainty [path widths]: 0.5
* uncertainty in time [s]: 13
* 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 Virgo, about 5.0 degrees southeast of 3.4 mag star zeta Virginis = SAO 139420 or
8.0 degrees northeast of 1.1 mag star alpha Virginis = SAO 157923 = Spica.
!!! 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 4970-01009-1
* constellation: Virgo
* J2000 position [h,m,s; o,',"]: 13h 45m 10.4203s; -04o 48' 35.799"
* position source: UCAC2
* estimated accuracy ["]: 0.03" (0.02", 0.02")
* V mag [mag]: 10.85
* B-V [mag]: +0.37
* remarks:
Data for the minor planet:
* general information:
number, name: (566) Stereoskopia
approx. diameter [km]: 175
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen), OAC (Lopez, Pachero)
number of used observations: 155 USNO, 6 TMO, 5 OAC
number of rejected observations: 0
time covered by the observations: 1998 01 29 - 2004 03 21
rms residuals ["] (RA,DE): 0.11", 0.11"
estimated positional accuracy at epoch of event ["]: 0.07", 0.05"
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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