IOTA/IOTA-ES occultation update for
(546) Herodias / UCAC2 44969446 = GSC 2895-02578 on October 28/29, 2005
visible from Africa, Sicilia, Italy, Austria, W Czechia, E Germany,
S Sweden and Norway
Summary
In the night of October 28/29, 2005 a faint 11.3 mag star UCAC2 44969446 = GSC 2895-02578 will be occulted by a 70 km asteroid (546) Herodias. 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 east shift with time ~0.2 minutes earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over Africa, Sicilia ~3:44.5 UT, middle Italy ~3:45.5 UT and NE Italy ~3:46.5 UT, middle Austria ~3:46.7 UT, W Czechia ~3:47.3 UT, E Germany ~3:47.8 UT, S Sweden ~3:48.8 UT and S Norway ~3:49.5 UT. Please check the path chart for details.
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The event at one glimpse:
* date and approx. UT time of event: October 29, 2005 @ 03:47 UT (Europe)
* magnitude of target star: 11.3
* magnitude drop [mag]: 2.6
* estimated maximum duration [s]: 8.5
* approx. V mag of minor planet at event [mag]: 13.8
* geocentric parallax of minor planet ["]: 5.314
* apparent motion of minor planet ["/h]: 24.72
* angular distance to moon, phase of moon [deg,%]: 90, 15%
* Goffin's original chart reference: A05_1053
The occultation path with path maps:
* approximate ground width [km]: 80
* uncertainty [path widths]: 2.0
* 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 SW Auriga, about 5.2 degrees NNE of 2.7 mag star iota Aurigae = SAO 57522.
!!! 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: UCAC2 44969446 = GSC 2895-02578
* constellation: Auriga
* J2000 position [h,m,s; o,',"]: 05h 09m 07.2515s; +37d 43' 17.205"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.017", 0.023"
* V mag [mag]: 11.34 (averaged NSVS V-mag)
* B-V [mag]: +?.??
* remarks:
Data for the minor planet:
* general information:
number, name: (546) Herodias
approx. diameter [km]: 70
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 134 USNO, 4 TMO
number of rejected observations: 0
time covered by the observations: 1998 02 24 - 2005 10 10
estimated positional 2-sigma accuracy at epoch of event ["]: 0.114", 0.050", 82 deg
remarks:
* orbital elements
Semimajor axis = 2.59870156443566
Eccentricity = 0.113574969660823
Inclination = 14.8567628012046 deg
Long. of node = 22.0187589448265 deg
Arg. of pericenter = 108.1624983979898 deg
Mean anomaly = 305.3425004963016 deg
Epoch of elements : MJD 53672.16000000 TDT (Oct 29, 2005, 3.840000 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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