IOTA/IOTA-ES occultation update for
(408) Fama / TYC 0809-00875-1 on March 4/5, 2004
visible from S Japan, China, S Russia, Ukraine, N Moldavia,
N Hungary, S Slovakia, Austria, S Germany, N Switzerland and France
Summary
In the night of March 4/5, 2004 a faint 11.5 mag star TYC 0809-00875-1 will be occulted by a 46 km asteroid (408) Fama. This update is based on USNO/Flagstaff astrometry for the asteroid and UCAC2 star position.
The updated path shows ~4 path width south shift with time 2.3 minutes later compared to Edwin Goffin's nominal prediction.
Updated path runs over S Japan ~18:12.5 UT, China around 18:16 UT, S Russia ~18:24.5 UT, Ukraine around 18:26.0 UT, N Moldavia ~18:26.7 UT, N Hungary ~18:27.6 UT, S Slovakia ~18:27.9 UT, Austria ~18:28.5 UT, S Germany ~18:18.9 UT, N Switzerland ~18:29.3 UT and France ~18:29.8 UT. Observations will complicated by almost full Moon only 13 degrees east of target star. Please check the path chart for details.
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The event at one glimpse:
* date and approx. UT time of event: March 4, 2004 @ 18:28 UT (Europe)
* magnitude of target star: 11.5
* magnitude drop [mag]: 3.0
* estimated maximum duration [s]: 5.6
* approx. V mag of minor planet at event [mag]: 14.4
* geocentric parallax of minor planet ["]: 3.814
* apparent motion of minor planet ["/h]: 17.68
* angular distance to moon, phase of moon [deg,%]: 13, 94%
* Goffin's original chart reference: A04_0314
The occultation path with path maps:
* approximate ground width [km]: 55
* uncertainty [path widths]: 2.0
* uncertainty in time [s]: 20
* map: Overview
Japanese part
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 south Cancer, about 4.6 degrees SSW of 3.9 mag star delta Cancri = SAO 98087.
!!! 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.
20-degree chart
3-degree chart
0.5-degree chart
Data for the target star:
* name: TYC 0809-00875-1
* constellation: Leo
* J2000 position [h,m,s; o,',"]: 08h 40m 17.1817s; +13o 36' 48.495"
* position source: UCAC2
* estimated accuracy ["]: 0.03" (0.02", 0.02")
* V mag [mag]: 11.52
* B-V [mag]: +1.24
* remarks:
Data for the minor planet:
* general information:
number, name: (408) Fama
approx. diameter [km]: 46
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone)
number of used observations: 106 USNO
number of rejected observations: 0
time covered by the observations: 1998 02 12 - 2004 02 16
rms residuals ["] (RA,DE): 0.10", 0.09"
estimated positional accuracy at epoch of event ["]: 0.09", 0.05"
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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