IOTA/IOTA-ES occultation update for
(903) Nealley / TYC 5025-00279-1 on April 7/8, 2004
visible from Middle East, Cyprus, W Turkey, Bulgaria, W Romania,
Hungary, W Slovakia, NE Czechia, N Germany, S Denmark and NE Iceland
Summary
In the night of April 7/8, 2004 a faint 11.7 mag star TYC 5025-00279-1 will be occulted by a 66 km asteroid (903) Nealley. 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 ~0.5 minutes later compared to Edwin Goffin's nominal prediction.
Updated path runs over Middle East ~0:14.5 UT, Cyprus ~0:15.1 UT, W Turkey ~0:15.9 UT, Bulgaria ~0:16.6 UT, W Romania ~0:17.0 UT, Hungary ~0:17.4 UT, W Slovakia ~0:17.6 UT, NE Czechia ~0:17.8 UT, N Germany ~0:18.2 UT, S Denmark ~0:18.5 UT and NE Iceland ~0:19.7 UT. Please check the path chart for details.
Almost full Moon is only 15 degrees south of target star area.
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The event at one glimpse:
* date and approx. UT time of event: April 8, 2004 @ 00:18 UT (Europe)
* magnitude of target star: 11.7
* magnitude drop [mag]: 3.4
* estimated maximum duration [s]: 6.8
* approx. V mag of minor planet at event [mag]: 15.1
* geocentric parallax of minor planet ["]: 3.499
* apparent motion of minor planet ["/h]: 19.20
* angular distance to moon, phase of moon [deg,%]: 15, 91%
* Goffin's original chart reference: A04_0439
The occultation path with path maps:
* approximate ground width [km]: 75
* uncertainty [path widths]: 2.2
* uncertainty in time [s]: 22
* 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 north Libra, about 2.9 degrees WSW of 3.5 mag star mu Serpentis = SAO 140787.
!!! 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 5025-00279-1
* constellation: Libra
* J2000 position [h,m,s; o,',"]: 15h 39m 25.5260s; -04o 53' 51.127"
* position source: UCAC2
* estimated accuracy ["]: 0.03" (0.02", 0.02")
* V mag [mag]: 11.71
* B-V [mag]: +0.50
* remarks:
Data for the minor planet:
* general information:
number, name: (903) Nealley
approx. diameter [km]: 66
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 144 USNO, 3 TMO
number of rejected observations: 0
time covered by the observations: 1998 02 26 - 2004 03 28
rms residuals ["] (RA,DE): 0.12", 0.12"
estimated positional accuracy at epoch of event ["]: 0.11", 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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