IOTA/IOTA-ES occultation update for
(78) Diana / HIP 115624 = SAO 146698 on September 01/02, 2005
visible from S Russia, N Greece, S Bulgaria, Albania, S Italy,
S Sardinia, S Spain, N Cuba and middle Mexico
Summary
In the night of September 01/02, 2005 a bright 9.4 mag star HIP 115624 = SAO 146698 will be occulted by a 116 km asteroid (78) Diana. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.
The updated path shows ~1.5 path width north shift with time ~0.3 minutes later compared to Edwin Goffin's nominal prediction.
Updated path runs over S Russia ~2:12.3 UT, N Greece ~2:13.3 UT, S Bulgaria ~2:13.2 UT, Albania ~2:13.5 UT, S Italy ~2:13.7 UT, S Sardinia ~2:14.4 UT, S Spain ~2:15.5 UT, N Cuba ~2:24.0 UT and middle Mexico ~2:25.1 UT. Please check the path chart for details.
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The event at one glimpse:
* date and approx. UT time of event: September 02, 2005 @ 02:14 UT (Europe)
* magnitude of target star: 9.4
* magnitude drop [mag]: 3.2
* estimated maximum duration [s]: 8.7
* approx. V mag of minor planet at event [mag]: 12.5
* geocentric parallax of minor planet ["]: 4.478
* apparent motion of minor planet ["/h]: 33.53
* angular distance to moon, phase of moon [deg,%]: 149, 3%
* Goffin's original chart reference: A05_0915
The occultation path with path maps:
* approximate ground width [km]: 140
* uncertainty [path widths]: 0.7
* uncertainty in time [s]: 10
* map: Overview
European part
American 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 SW Pisces, about 1.5 degrees SSW of 4.9 mag star kappa Piscii = SAO 128186.
!!! 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: HIP 115624 = SAO 146698 = PPM 181627 = TYC 5244-00668-1
* constellation: Sagittarius
* J2000 position [h,m,s; o,',"]: 23h 25m 24.2961s; -00d 12' 54.853"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.039" (0.026", 0.029")
* V mag [mag]: 9.42 (HIP)
* B-V [mag]: +0.27 (TYC)
* remarks:
Data for the minor planet:
* general information:
number, name: (78) Diana
approx. diameter [km]: 116
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 132 USNO, 11 TMO
number of rejected observations: 0
time covered by the observations: 1999 01 13 - 2005 08 18
estimated positional 2-sigma accuracy at epoch of event ["]: 0.088", 0.036", 59 deg
remarks:
* orbital elements
Semimajor axis = 2.62012514149239
Eccentricity = 0.207531839341899
Inclination = 8.6886256569747 deg
Long. of node = 333.5943600103303 deg
Arg. of pericenter = 151.4225575585654 deg
Mean anomaly = 241.1278191780707 deg
Epoch of elements : MJD 53615.09000000 TDT (Sep 2, 2005, 2.160000 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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