IOTA/IOTA-ES occultation update for
(705) Erminia / HIP 3994 = SAO 74319 on November 25/26, 2005
visible from Siberia, N Greenland and NW Canada
Summary
In the night of November 25/26, 2005 a bright 9.1 mag star HIP 3994 = SAO 74319 will be occulted by a 139 km asteroid (705) Erminia. This update is based on USNO/Flagstaff astrometry for the asteroid and Hipparcos star position.
The updated path shows ~0.5" north shift with time ~1.0 minutes earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over Siberia ~0:36.0 UT, N Greenland ~0:41.5 UT and NW Canada 0:46-0:50 UT. Not for European observers. 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 26, 2005 @ 00:36 UT (Europe)
* magnitude of target star: 9.1
* magnitude drop [mag]: 4.0
* estimated maximum duration [s]: 20.1
* approx. V mag of minor planet at event [mag]: 13.1
* geocentric parallax of minor planet ["]: 4.271
* apparent motion of minor planet ["/h]: 16.69
* angular distance to moon, phase of moon [deg,%]: 147, 31%
* Goffin's original chart reference: A05_1167
The occultation path with path maps:
* approximate ground width [km]: 210
* uncertainty [path widths]: 0.6
* uncertainty in time [s]: 18
* 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:
!!! 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 3994 = SAO 74319 = PPM 90224 = TYC 1742-00019-1
* constellation: Pisces
* J2000 position [h,m,s; o,',"]: 00h 51m 19.4180s; +27d 21' 27.926"
* position source: Hipparcos
* estimated 1-sigma accuracy ["]: 0.016", 0.010"
* V mag [mag]: 9.02 (Hipparcos)
* B-V [mag]: +0.90 (Tycho-2)
* remarks:
Data for the minor planet:
* general information:
number, name: (705) Erminia
approx. diameter [km]: 139
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone)
number of used observations: 152 USNO
number of rejected observations: 0
time covered by the observations: 1998 03 12 - 2005 11 14
estimated positional 2-sigma accuracy at epoch of event ["]: 0.074", 0.044", 45 deg
remarks:
* orbital elements
Semimajor axis = 2.92419414162598
Eccentricity = 0.052248477147318
Inclination = 25.0107575054056 deg
Long. of node = 3.0358836261072 deg
Arg. of pericenter = 97.3856363973965 deg
Mean anomaly = 303.7465288766944 deg
Epoch of elements : MJD 53700.02000000 TDT (Nov 26, 2005, 0.480000 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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