IOTA/IOTA-ES occultation update for
(560) Delila / TYC 1348-00839-1 on October 27/28, 2004
visible from USA, Canada and Scotland in twilight
Summary
In the night of October 27/28, 2004 a bright 9.7 mag star TYC 1348-00839-1 will be occulted by a 41 km asteroid (560) Delila. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.
The updated path shows ~3 path width N shift with time ~4.6 minute earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over USA at 6:23.5 UT to 6:26.0 UT, Canada at 6:26.0 UT to 6:29.7 UT and Scotland in twilight around 6:36.1 UT. For Europe it is a marginal event. 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: October 28, 2004 @ 06:36 UT (Europe)
* magnitude of target star: 9.7
* magnitude drop [mag]: 5.7
* estimated maximum duration [s]: 4.7
* approx. V mag of minor planet at event [mag]: 15.4
* geocentric parallax of minor planet ["]: 4.819
* apparent motion of minor planet ["/h]: 23.84
* angular distance to moon, phase of moon [deg,%]: 68, 100%
* Goffin's original chart reference: A04_1029
The occultation path with path maps:
* approximate ground width [km]: 50
* uncertainty [path widths]: 2.55
* uncertainty in time [s]: 21
* map: Overview
N.America 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 mid-south Gemini, about 2.4 degrees south of 4.0 mag star zeta Geminorum = SAO 79031.
!!! 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 1348-00839-1
* constellation: Gemini
* J2000 position [h,m,s; o,',"]: 07h 03m 59.2708s; +18o 11' 16.477"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.025" (0.015", 0.020")
* V mag [mag]: 9.65
* B-V [mag]: +0.12
* remarks:
Data for the minor planet:
* general information:
number, name: (560) Delila
approx. diameter [km]: 41
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 124 USNO, 4 TMO
number of rejected observations: 0
time covered by the observations: 1998 06 23 - 2004 10 14
rms residuals ["] (RA,DE): 0.13", 0.13"
estimated positional 2-sigma accuracy at epoch of event ["]: 0.13", 0.07"
remarks:
* orbital elements
Semimajor axis = 2.75217729110154 AU
Eccentricity = 0.157930629043284
Inclination = 8.4560400295341 deg
Long. of node = 105.4786675273688 deg
Arg. of pericenter = 4.1378904175299 deg
Mean anomaly = 339.6530022597033 deg
Epoch of elements : MJD 53306.28000000 TDT (Oct 28, 2004, 6.720000 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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