IOTA/IOTA-ES occultation update for
(521) Brixia / TYC 2422-00833-1 on March 6/7, 2004
visible from S Spain, Mallorca, Sardinia, S Italy, S Albania,
N Greece, Turkey, N Iran, S Afghanistan, Pakistan and N India
Summary
In the night of March 6/7, 2004 a faint 11.5 mag star TYC 2422-00833-1 will be occulted by a 103 km asteroid (521) Brixia. 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 S Spain ~18:31.0 UT, Mallorca ~18:31.6 UT, Sardinia ~18:32.6 UT, S Italy ~18:33.6 UT, S Albania ~18:34.3 UT, N Greece ~18:34.6 UT, Turkey ~18:36.5 UT, N Iran ~18:39 UT, S Afghanistan ~18:40.5 UT, Pakistan ~18:41.3 UT and N India ~18:42.5 UT. Please check the path chart for details.
Target is NE and slightly brighter star in 14" wide pair.
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The event at one glimpse:
* date and approx. UT time of event: March 6, 2004 @ 18:33 UT (Europe)
* magnitude of target star: 11.9
* magnitude drop [mag]: 1.2
* estimated maximum duration [s]: 10.6
* approx. V mag of minor planet at event [mag]: 12.7
* geocentric parallax of minor planet ["]: 4.795
* apparent motion of minor planet ["/h]: 26.32
* angular distance to moon, phase of moon [deg,%]: 68, 100%
* Goffin's original chart reference: A04_0324
The occultation path with path maps:
* approximate ground width [km]: 105
* uncertainty [path widths]: 0.5
* uncertainty in time [s]: 7
* map: Overview
European part
Asian 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 south Auriga, about 2.6 degrees east of 4.3 mag star kappa Aurigae = SAO 78143.
Target is NE and slightly brighter star in 14" wide pair.
!!! 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 2422-00833-1
* constellation: Auriga
* J2000 position [h,m,s; o,',"]: 06h 27m 00.9247s; +30o 00' 50.315"
* position source: UCAC2
* estimated accuracy ["]: 0.03" (0.02", 0.03")
* V mag [mag]: 11.89
* B-V [mag]: +0.07
* remarks:
Data for the minor planet:
* general information:
number, name: (521) Brixia
approx. diameter [km]: 103
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 117 USNO, 45 TMO
number of rejected observations: 0
time covered by the observations: 1998 08 26 - 2004 02 08
rms residuals ["] (RA,DE): 0.05", 0.04"
estimated positional accuracy at epoch of event ["]: 0.04", 0.04"
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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