IOTA/IOTA-ES occultation update for
(275) Sapientia / TYC 5823-00710-1 on October 6/7, 2005
visible from Iceland
Summary
In the night of October 6/7, 2005 a faint 11.2 mag star TYC 5823-00710-1 will be occulted by a 103 km asteroid (275) Sapientia. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.
The updated path shows ~3 path width north shift with time ~0.2 minutes later compared to Edwin Goffin's nominal prediction.
Updated path runs over Iceland ~21:56.3 UT. Please check the path chart for details.
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The event at one glimpse:
* date and approx. UT time of event: October 06, 2005 @ 21:56 UT (Europe)
* magnitude of target star: 11.2
* magnitude drop [mag]: 2.8
* estimated maximum duration [s]: 9.9
* approx. V mag of minor planet at event [mag]: 13.9
* geocentric parallax of minor planet ["]: 2.787
* apparent motion of minor planet ["/h]: 22.21
* angular distance to moon, phase of moon [deg,%]: 108, 12%
* Goffin's original chart reference: A05_1040
The occultation path with path maps:
* approximate ground width [km]: 160
* uncertainty [path widths]: 1.0
* uncertainty in time [s]: 12
* 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 middle Aquarius, about 3.9 degrees SE of 3.7 mag star lambda Aquarii = SAO 146362.
!!! 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 5823-00710-1
* constellation: Aquarius
* J2000 position [h,m,s; o,',"]: 23h 03m 17.8408s; -10d 27' 40.401"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.018", 0.018"
* V mag [mag]: 11.16 (averaged ASAS3 V-mag)
* B-V [mag]: +0.44 (Tycho-2)
* remarks:
Data for the minor planet:
* general information:
number, name: (275) Sapientia
approx. diameter [km]: 103
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 125 USNO, 32 TMO
number of rejected observations: 0
time covered by the observations: 1997 11 29 - 2005 09 01
estimated positional 2-sigma accuracy at epoch of event ["]: 0.062", 0.046", 73 deg
remarks:
* orbital elements
Semimajor axis = 2.77326095591873
Eccentricity = 0.161228054033456
Inclination = 4.7701959405809 deg
Long. of node = 134.2904168958089 deg
Arg. of pericenter = 37.3427433109162 deg
Mean anomaly = 180.7073912568215 deg
Epoch of elements : MJD 53649.91000000 TDT (Oct 6, 2005, 21.840000 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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