IOTA/IOTA-ES occultation update for
(635) Vundtia / TYC 0756-01389-1 on September 10/11, 2004
visible from N Spain, very S France, Corse and middle Italy in twilight
Summary
In the night of September 10/11, 2004 a faint 12.0 mag star TYC 0756-01389-1 will be occulted by a 100 km asteroid (635) Vundtia. This update is based on USNO/Flagstaff astrometry for the asteroid and UCAC2 star position.
The updated path shows large ~10 path width south shift with time ~0.1 minute earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over N Spain ~4:42.3 UT, very S France ~4:42.4 UT with Pic du Midi, Corse ~4:42.7 UT and middle Italy in strong twilight ~4:42.8 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: September 11, 2004 @ 04:42 UT (Europe)
* magnitude of target star: 12.0
* magnitude drop [mag]: 3.1
* estimated maximum duration [s]: 3.4
* approx. V mag of minor planet at event [mag]: 15.0
* geocentric parallax of minor planet ["]: 2.718
* apparent motion of minor planet ["/h]: 45.04
* angular distance to moon, phase of moon [deg,%]: 29, 12%
* Goffin's original chart reference: A04_0932
The occultation path with path maps:
* approximate ground width [km]: 110
* uncertainty [path widths]: 0.9
* uncertainty in time [s]: 10
* 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 very south Gemini, about 3.1 degrees east of 3.3 mag star xi Geminorum = SAO 96074.
!!! 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 0756-01389-1
* constellation: Gemini
* J2000 position [h,m,s; o,',"]: 06h 57m 56.3487s; +12o 44' 14.699"
* position source: UCAC2
* estimated accuracy ["]: 0.03" (0.02", 0.02")
* V mag [mag]: 11.99
* B-V [mag]: +0.52
* remarks:
Data for the minor planet:
* general information:
number, name: (635) Vundtia
approx. diameter [km]: 100
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone)
number of used observations: 126 USNO
number of rejected observations: 0
time covered by the observations: 1998 09 19 - 2004 01 10
rms residuals ["] (RA,DE): 0.12", 0.12"
estimated positional accuracy at epoch of event ["]: 0.11", 0.03"
remarks:
* orbital elements
Semimajor axis = 3.14032383217323 AU
Eccentricity = 0.079944667519617
Inclination = 11.0468804486632 deg
Long. of node = 183.4791976057707 deg
Arg. of pericenter = 218.7713906320249 deg
Mean anomaly = 37.8771410755984 deg
Epoch of elements : MJD 53259.20000000 TDT (Sep 11, 2004, 4.800000 h)
Path coordinates: click here
Calculator(s): Jan Manek
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Jan Manek
Werichova 950
152 00 Praha 5 - Barrandov |_|_|
Czech Republic / \
Internet : jan.manek AT worldonline.cz |-O-O-|
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