IOTA/IOTA-ES occultation update for
(63) Ausonia / TYC 1921-02606-1 = SAO 79224 on October 14/15, 2004
visible from Ireland, Scotland, S Norway, mid-Sweden, Finland and N Russia
Summary
In the night of October 14/15, 2004 a bright 9.6 mag star TYC 1921-02606-1 = SAO 79224 will be occulted by a 108 km asteroid (63) Ausonia. This update is based on USNO/Flagstaff, TMO, CAMC and Bordeaux astrometry for the asteroid and UCAC2 star position.
The updated path shows ~0.5 path width north shift with time ~0.1 minute earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over Ireland ~1:56.6 UT, Scotland ~1:57.0 UT, S Norway ~1:58.0 UT, mid-Sweden ~1:58.5 UT, Finland ~1:59.2 UT and N Russia around 2:00 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 15, 2004 @ 01:57 UT (Europe)
* magnitude of target star: 9.6
* magnitude drop [mag]: 2.9
* estimated maximum duration [s]: 8.6
* approx. V mag of minor planet at event [mag]: 12.4
* geocentric parallax of minor planet ["]: 3.644
* apparent motion of minor planet ["/h]: 25.80
* angular distance to moon, phase of moon [deg,%]: 108, 1%
* Goffin's original chart reference: A04_1008
The occultation path with path maps:
* approximate ground width [km]: 140
* uncertainty [path widths]: 0.75
* uncertainty in time [s]: 9
* 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 Gemini, about 2.3 degrees WNW of 3.8 mag star iota Geminorum = SAO 79374
or 37' N of 5.7 mag star 53 Geminorum = SAO 79221.
!!! 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 1921-02606-1 = SAO 79224 = PPM 97278
* constellation: Gemini
* J2000 position [h,m,s; o,',"]: 07h 16m 05.2481s; +28o 31' 18.613"
* position source: UCAC2
* estimated accuracy ["]: 0.03" (0.02", 0.03")
* V mag [mag]: 9.64
* B-V [mag]: +0.52
* remarks:
Data for the minor planet:
* general information:
number, name: (63) Ausonia
approx. diameter [km]: 108
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen), CAMC, Bordeaux
number of used observations: 143 USNO, 9 TMO, 285 CAMC+Bordeuax
number of rejected observations: 0
time covered by the observations: 1983 02 18 - 2003 12 22
rms residuals ["] (RA,DE): 0.20", 0.20"
estimated positional accuracy at epoch of event ["]: 0.05", 0.04"
remarks:
* orbital elements
Semimajor axis = 2.39511862825436 AU
Eccentricity = 0.126346204393011
Inclination = 5.7882377806678 deg
Long. of node = 337.9528855026338 deg
Arg. of pericenter = 295.8811307563678 deg
Mean anomaly = 168.6122492419736 deg
Epoch of elements : MJD 53293.08000000 TDT (Oct 15, 2004, 1.920000 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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