IOTA/IOTA-ES occultation update for
(121) Hermione / TYC 4974-01069-1 on December 11/12, 2005
visible from Ireland, England, N France, Belgium, S Netherlands,
S Germany, very S Czechia, Austria, Slovenia, Hungary and Serbia
Summary
In the morning of night of December 11/12, 2005 a faint 10.0 mag star TYC 4974-01069-1 will be occulted by a 217 km asteroid (121) Hermione. This update is based on USNO/Flagstaff and TMO astrometry for the asteroid and UCAC2 star position.
The updated path shows ~0.5 path width south shift with time ~0.1 minutes later compared to Frappa's nominal prediction.
Updated path runs over Ireland ~6:06.0 UT, England ~6:06.1 UT, N France ~6:06.2 UT, Belgium ~6:06.2 UT, S Netherlands ~6:06.2 UT, S Germany ~6:06.4 UT, very S Czechia ~6:06.5 UT, Austria ~6:06.6 UT, Slovenia ~6:06.6 UT, Hungary ~6:06.8 UT and Serbia ~6:06.7 UT. Please check the path chart for details.
I have no predictions for Hermione's satellite S/2002 (121) 1 'LaFayette', therefore no path prediction for this small one.
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Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: December 12, 2005 @ 06:06 UT (Europe)
* magnitude of target star: 10.0
* magnitude drop [mag]: 4.3
* estimated maximum duration [s]: 6.8
* approx. V mag of minor planet at event [mag]: 14.3
* geocentric parallax of minor planet ["]: 1.972
* apparent motion of minor planet ["/h]: 35.69
* angular distance to moon, phase of moon [deg,%]: 166, 88%
* Goffin's original chart reference: AXX_XXXX
The occultation path with path maps:
* approximate ground width [km]: 290
* uncertainty [path widths]: 0.62
* uncertainty in time [s]: 8
* 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-west Virgo, about 8.8 degrees NE of 1.1 mag star alpha Virginis = SAO 157923.
!!! 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 4974-01069-1
* constellation: Virgo
* J2000 position [h,m,s; o,',"]: 13h 52m 56.3008s; -05d 37' 27.465"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.017", 0.017"
* V mag [mag]: 10.04 (averaged ASAS3 V-mag)
* B-V [mag]: +0.43 (Tycho-2)
* remarks:
Data for the minor planet:
* general information:
number, name: (121) Hermione
approx. diameter [km]: 217
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone), TMO (Bill Owen)
number of used observations: 183 USNO, 52 TMO
number of rejected observations: 0
time covered by the observations: 1998 01 29 - 2005 04 17
estimated positional 2-sigma accuracy at epoch of event ["]: 0.056", 0.022", 116 deg
remarks:
* orbital elements
Semimajor axis = 3.44984888924191
Eccentricity = 0.141718453254020
Inclination = 7.5825579595397 deg
Long. of node = 73.3280543714511 deg
Arg. of pericenter = 295.6336239275385 deg
Mean anomaly = 190.0028983127678 deg
Epoch of elements : MJD 53716.25000000 TDT (Dec 12, 2005, 6.000000 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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