IOTA/IOTA-ES occultation update for
(238) Hypatia / TYC 0158-01520-1 on November 10/11, 2004
visible from Finland, Sweden, S Norway, NW Denmark, England,
NW France, NW Spain and South America
Summary
In the night of November 10/11, 2004 a faint 11.2 mag star TYC 0158-01520-1 will be occulted by a 156 km asteroid (238) Hypatia. 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 ~0.4 minutes later compared to Edwin Goffin's nominal prediction.
Updated path runs over Finland ~4:33.0 UT, Sweden ~4:34.0 UT, S Norway ~4:34.4 UT, NW Denmark ~4:34.7 UT, England with London ~4:36.0 UT, NW France ~4:36.9 UT, NW Spain ~4:38.2 UT and South America 4:53->5:03 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: November 11, 2004 @ 04:36 UT (Europe)
* magnitude of target star: 11.2
* magnitude drop [mag]: 1.7
* estimated maximum duration [s]: 24.7
* approx. V mag of minor planet at event [mag]: 12.6
* geocentric parallax of minor planet ["]: 4.408
* apparent motion of minor planet ["/h]: 15.69
* angular distance to moon, phase of moon [deg,%]: 111, 3%
* Goffin's original chart reference: A04_1129
The occultation path with path maps:
* approximate ground width [km]: 160
* uncertainty [path widths]: 0.85
* uncertainty in time [s]: 22
* map: Overview
European part
South America 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 NW Monoceros, about 8.8 degrees east of 0.6 mag star alpha Orionis = SAO 113271.
!!! 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 0158-01520-1
* constellation: Monoceros
* J2000 position [h,m,s; o,',"]: 06h 30m 11.4588s; +06d 32' 04.125"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.032" (0.025", 0.020")
* R mag [mag]: 11.23
* B-V [mag]: +0.50
* remarks:
Data for the minor planet:
* general information:
number, name: (238) Hypatia
approx. diameter [km]: 156
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen), LaSilla (Raoul Behrend)
number of used observations: 116 USNO, 22 TMO, 5 LaSilla
number of rejected observations: 0
time covered by the observations: 1998 07 02 - 2004 11 04
rms residuals ["] (RA,DE): 0.10", 0.10"
estimated positional 2-sigma accuracy at epoch of event ["]: 0.09", 0.04"
remarks:
* orbital elements
Semimajor axis = 2.90641065965616 AU
Eccentricity = 0.088916125643812
Inclination = 12.4080586592505 deg
Long. of node = 184.2004895449423 deg
Arg. of pericenter = 206.9601704336171 deg
Mean anomaly = 43.1966812302748 deg
Epoch of elements : MJD 53320.19000000 TDT (Nov 11, 2004, 4.560000 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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