IOTA/IOTA-ES occultation update for
(397) Vienna / TYC 1768-00244-1 on October 5/6, 2005
visible from Norway, S Sweden, W Poland, E Czechia, W Slovakia,
E Austria, W Hungary, frm. Yugoslavia, S Italy and Africa
Summary
In the night of October 5/6, 2005 a faint 11.3 mag star TYC 1768-00244-1 will be occulted by a 46 km asteroid (397) Vienna. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.
The updated path shows no path shift with time ~0.7 minutes earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over Norway ~21:18.5 UT, S Sweden ~21:19.8 UT, W Poland ~21:21.6 UT, E Czechia ~21:22.5 UT, W Slovakia ~21:22.9 UT, E Austria ~21:23.0 UT, W Hungary ~21:23.4 UT, frm. Yugoslavia ~21:24.1 UT, S Italy ~21:25.8 UT and Africa. Please check the path chart for details.
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The event at one glimpse:
* date and approx. UT time of event: October 05, 2005 @ 21:23 UT (Europe)
* magnitude of target star: 11.3
* magnitude drop [mag]: 1.2
* estimated maximum duration [s]: 8.4
* approx. V mag of minor planet at event [mag]: 12.0
* geocentric parallax of minor planet ["]: 7.980
* apparent motion of minor planet ["/h]: 24.69
* angular distance to moon, phase of moon [deg,%]: 174, 6%
* Goffin's original chart reference: A05_1044
The occultation path with path maps:
* approximate ground width [km]: 60
* uncertainty [path widths]: 2.5
* uncertainty in time [s]: 13
* 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 middle Aries, about 7.8 degrees E of 2.0 mag star alpha Arietis = SAO 75151.
!!! 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 1768-00244-1
* constellation: Aries
* J2000 position [h,m,s; o,',"]: 02h 41m 21.3523s; +23d 39' 40.105"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.016", 0.016"
* V mag [mag]: 10.32 (averaged NSVS V-mag)
* B-V [mag]: +0.47 (Tycho-2)
* remarks:
Data for the minor planet:
* general information:
number, name: (397) Vienna
approx. diameter [km]: 46
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 150 USNO, 7 TMO
number of rejected observations: 0
time covered by the observations: 1998 02 17 - 2005 09 20
estimated positional 2-sigma accuracy at epoch of event ["]: 0.146", 0.064", 87 deg
remarks:
* orbital elements
Semimajor axis = 2.63525554997861
Eccentricity = 0.246524873764713
Inclination = 12.8353183458666 deg
Long. of node = 228.2684449082529 deg
Arg. of pericenter = 139.4299594889518 deg
Mean anomaly = 12.7357187332869 deg
Epoch of elements : MJD 53648.89000000 TDT (Oct 5, 2005, 21.360000 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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