IOTA/IOTA-ES occultation update for
(349) Dembowska / HIP 53965 = SAO 99415 on February 20/21, 2004
visible from India, middle East, Cyprus, very SW Turkey,
S Greece, Sicilia, S Spain and S Portugal
Summary
In the night of February 20/21, 2004 a bright 8.2 mag star HIP 53965 = SAO 99415 will be occulted by a 143 km asteroid (349) Dembowska. This update is based on USNO/Flagstaff, TMO and OAC astrometry for the asteroid and Hipparcos star position.
The updated path shows ~1 path width south shift with time 0.1 minutes earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over India around 21:21 UT, middle East ~21:26.0 UT, Cyprus ~21:26.6 UT, very SW Turkey ~21:27.0 UT, S Greece ~21:27.7 UT, Sicilia ~21:28.4 UT, S Spain ~21:29.7 UT and S Portugal ~21:30.0 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: February 20, 2004 @ 21:28 UT (Europe)
* magnitude of target star: 8.2
* magnitude drop [mag]: 2.3
* estimated maximum duration [s]: 10.6
* approx. V mag of minor planet at event [mag]: 10.4
* geocentric parallax of minor planet ["]: 4.121
* apparent motion of minor planet ["/h]: 31.45
* angular distance to moon, phase of moon [deg,%]: 174, 0%
* Goffin's original chart reference: A04_0214
The occultation path with path maps:
* approximate ground width [km]: 150
* uncertainty [path widths]: 0.33
* uncertainty in time [s]: 6
* map: Overview
Indian 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 middle Leo, about 3.2 degrees NW of 3.3 mag star theta Leonis = SAO 99512.
!!! 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: HIP 53965 = SAO 99415 = PPM 127927 = TYC 1430-00456-1
* constellation: Leo
* J2000 position [h,m,s; o,',"]: 11h 02m 24.8367s; +16o 52' 46.741"
* position source: Hipparcos
* estimated accuracy ["]: 0.02" (0.02", 0.01")
* V mag [mag]: 8.24
* B-V [mag]: +1.00
* remarks:
Data for the minor planet:
* general information:
number, name: (349) Dembowska
approx. diameter [km]: 143
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen), OAC
number of used observations: 127 USNO, 36 TMO, 5 OAC
number of rejected observations: 0
time covered by the observations: 1997 11 22 - 2004 02 07
rms residuals ["] (RA,DE): 0.08", 0.08"
estimated positional accuracy at epoch of event ["]: 0.04", 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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