IOTA/IOTA-ES occultation update for
(554) Peraga / TYC 0829-00848-1 on March 8/9, 2004
visible from India, Saudi Arabia, N Egypt, NE Libya, N Tunisia,
NE Algeria, S Spain and middle Portugal
Summary
In the night of March 8/9, 2004 a bright 9.8 mag star TYC 0829-00848-1 will be occulted by a 99 km asteroid (554) Peraga. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.
The updated path shows ~0.5 path width north shift with time 0.2 minutes earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over India around 21:01 UT, Saudi Arabia around 21:07 UT, N Egypt ~21:09.5 UT, NE Libya ~21:11.0 UT, N Tunisia ~21:13.1 UT, NE Algeria ~21:13.6 UT, S Spain ~21:15.0 UT and middle Portugal ~21:15.7 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 8, 2004 @ 21:15 UT (Europe)
* magnitude of target star: 9.8
* magnitude drop [mag]: 2.5
* estimated maximum duration [s]: 11.3
* approx. V mag of minor planet at event [mag]: 12.2
* geocentric parallax of minor planet ["]: 6.345
* apparent motion of minor planet ["/h]: 31.27
* angular distance to moon, phase of moon [deg,%]: 45, 96%
* Goffin's original chart reference: A04_0326
The occultation path with path maps:
* approximate ground width [km]: 110
* uncertainty [path widths]: 0.4
* uncertainty in time [s]: 7
* map: Overview
Asian part
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 southwest Leo, about 4.0 degrees southwest of 1.4 mag star alpha Leonis = Regulus = SAO 98967.
!!! 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.
20-degree chart
3-degree chart
0.5-degree chart
Data for the target star:
* name: TYC 0829-00848-1
* constellation: Leo
* J2000 position [h,m,s; o,',"]: 09h 57m 44.1220s; +08o 56' 52.971"
* position source: UCAC2
* estimated accuracy ["]: 0.03" (0.02", 0.02")
* V mag [mag]: 9.80
* B-V [mag]: +0.48
* remarks:
Data for the minor planet:
* general information:
number, name: (554) Peraga
approx. diameter [km]: 99
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 134 USNO, 56 TMO
number of rejected observations: 0
time covered by the observations: 1998 05 18 - 2004 02 15
rms residuals ["] (RA,DE): 0.08", 0.08"
estimated positional accuracy at epoch of event ["]: 0.05", 0.03"
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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