IOTA/IOTA-ES occultation update for
(444) Gyptis / TYC 0788-01194-1 on April 26/27, 2004
visible from N Morocco, Algeria, S Tunisia and N Lybia
Summary
In the night of April 26/27, 2004 a faint 10.9 mag star TYC 0788-01194-1 will be occulted by a 161 km asteroid (444) Gyptis. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.
The updated path shows ~3.5 path width south shift with time ~0.5 minutes later compared to Edwin Goffin's nominal prediction.
Updated path runs over N Morocco ~22:35.5 UT, Algeria ~22:35.7 UT, S Tunisia ~22:35.8 UT and N Libya ~22:35.9 UT. Please check the path chart for details. No chance for Europe.
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Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: April 26, 2004 @ 22:35 UT (N.Africa)
* magnitude of target star: 10.9
* magnitude drop [mag]: 3.1
* estimated maximum duration [s]: 8.4
* approx. V mag of minor planet at event [mag]: 13.9
* geocentric parallax of minor planet ["]: 2.824
* apparent motion of minor planet ["/h]: 30.56
* angular distance to moon, phase of moon [deg,%]: 14, 42%
* Goffin's original chart reference: A04_0432
The occultation path with path maps:
* approximate ground width [km]: 180
* uncertainty [path widths]: 0.5
* uncertainty in time [s]: 5
* map: Overview
African 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 Cancer, about 4.7 degrees NW of 3.5 mag star beta Cancri = SAO 116569.
Only 2' NNE of target is double star ROE32 (10.3+10.9mag; separation ~9" at PA 294).
!!! 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 0788-01194-1
* constellation: Cancer
* J2000 position [h,m,s; o,',"]: 08h 00m 20.4006s; +11o 35' 44.495"
* position source: UCAC2
* estimated accuracy ["]: 0.03" (0.02", 0.02")
* V mag [mag]: 10.93
* B-V [mag]: +1.21
* remarks:
Data for the minor planet:
* general information:
number, name: (444) Gyptis
approx. diameter [km]: 161
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 138 USNO, 30 TMO
number of rejected observations: 0
time covered by the observations: 1997 05 30 - 2004 03 29
rms residuals ["] (RA,DE): 0.08", 0.11"
estimated positional accuracy at epoch of event ["]: 0.03", 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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