IOTA/IOTA-ES occultation update for
(780) Armenia / TYC 0418-00502-1 on June 5/6, 2004
visible from N Turkey, N Greece, S Albania, S Italy, Sardegna,
Baleares, middle Spain and middle Portugal
Summary
In the night of June 5/6, 2004 a faint 11.7 mag star TYC 0418-00502-1 will be occulted by a 97 km asteroid (780) Armenia. This update is based on USNO/Flagstaff astrometry for the asteroid and UCAC2 star position.
The updated path shows ~3 path width south shift with time ~0.1 minutes later compared to Edwin Goffin's nominal prediction.
Updated path runs over N Turkey ~22:54.7 UT, N Greece ~22:55.9 UT, S Albania ~22:56.0 UT, S Italy ~22:56.5 UT, Sardinia ~22:57.3 UT, Baleares ~22:57.9 UT, middle Spain ~22:58.5 UT and middle Portugal ~22:59.0 UT. Please check the path chart for details.
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The event at one glimpse:
* date and approx. UT time of event: June 05, 2004 @ 22:57 UT (Europe)
* magnitude of target star: 11.7
* magnitude drop [mag]: 2.3
* estimated maximum duration [s]: 7.7
* approx. V mag of minor planet at event [mag]: 13.9
* geocentric parallax of minor planet ["]: 3.979
* apparent motion of minor planet ["/h]: 28.38
* angular distance to moon, phase of moon [deg,%]: 43, 88%
* Goffin's original chart reference: A04_0640
The occultation path with path maps:
* approximate ground width [km]: 120
* uncertainty [path widths]: 1.0
* uncertainty in time [s]: 11
* 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 Ophiuchus, about 3.5 degrees southwest of 2.7 mag star beta Ophiuchi = SAO 122671.
!!! 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 0418-00502-1
* constellation: Ophiuchus
* J2000 position [h,m,s; o,',"]: 17h 33m 59.0548s; +01o 56' 17.297"
* position source: UCAC2
* estimated accuracy ["]: 0.03" (0.02", 0.02")
* V mag [mag]: 11.66
* B-V [mag]: +1.13
* remarks:
Data for the minor planet:
* general information:
number, name: (780) Armenia
approx. diameter [km]: 97
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone)
number of used observations: 158 USNO
number of rejected observations: 0
time covered by the observations: 1998 02 14 - 2004 05 22
rms residuals ["] (RA,DE): 0.10", 0.10"
estimated positional accuracy at epoch of event ["]: 0.08", 0.06"
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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