IOTA/IOTA-ES occultation update for
(141) Lumen / TYC 2434-00810-1 on September 29/30, 2004
visible from Portugal, NW Spain, France, Luxembourg, E Belgium,
very SE Netherlands, NW Germany, very SE Sweden, NW Estonia,
SE Finland and N Russia
Summary
In the night of September 29/30, 2004 a faint 10.4 mag star TYC 2434-00810-1 will be occulted by a 135 km asteroid (141) Lumen. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.
The updated path shows ~1 path width SE shift with time ~0.3 minute earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over Portugal ~1:06.4 UT, NW Spain ~1:06.7 UT, France from SW to NE around 1:07.2 UT, Luxembourg ~1:07.5 UT, E Belgium ~1:07.6 UT, very SE Netherlands ~1:07.6 UT, NW Germany around 1:07.8 UT, very SE Sweden ~1:08.3 UT, NW Estonia ~1:08.9 UT, SE Finland ~1:09.2 UT and N Russia around 1:10 UT. Please check the path chart for details.
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Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: September 30, 2004 @ 01:08 UT (Europe)
* magnitude of target star: 10.4
* magnitude drop [mag]: 2.6
* estimated maximum duration [s]: 8.2
* approx. V mag of minor planet at event [mag]: 12.9
* geocentric parallax of minor planet ["]: 4.421
* apparent motion of minor planet ["/h]: 40.86
* angular distance to moon, phase of moon [deg,%]: 71, 97%
* Goffin's original chart reference: A04_0916
The occultation path with path maps:
* approximate ground width [km]: 160
* uncertainty [path widths]: 0.8
* uncertainty in time [s]: 15
* 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 SE Auriga, about 5.9 degrees ESE of 2.6 mag star theta Aurigae = SAO 58636.
!!! 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 2434-00810-1
* constellation: Auriga
* J2000 position [h,m,s; o,',"]: 06h 28m 29.9144s; +35o 56' 27.496"
* position source: UCAC2
* estimated accuracy ["]: 0.03" (0.02", 0.02")
* V mag [mag]: 10.41
* B-V [mag]: +0.34
* remarks:
Data for the minor planet:
* general information:
number, name: (141) Lumen
approx. diameter [km]: 135
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 144 USNO, 11 TMO
number of rejected observations: 0
time covered by the observations: 1995 08 29 - 2004 09 12
rms residuals ["] (RA,DE): 0.16", 0.17"
estimated positional accuracy at epoch of event ["]: 0.15", 0.05"
remarks:
* orbital elements
Semimajor axis = 2.665323202606600 AU
Eccentricity = 0.215073312599602
Inclination = 11.8849936209766 deg
Long. of node = 318.7856605752262 deg
Arg. of pericenter = 57.6334629707030 deg
Mean anomaly = 34.4799096600487 deg
Epoch of elements : MJD 53278.05000000 TDT (Sep 30, 2004, 1.200000 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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