IOTA/IOTA-ES occultation update for
(136) Austria / TAC +04 07178 = GSC 0231-00966 on November 20/21, 2004
visible from Ireland, N England, S Netherlands, N Belgium, Germany,
SW Czechia, NE Austria, SW Slovakia, Hungary, Romania, NE Bulgaria and Turkey
Summary
In the night of November 20/21, 2004 a faint 12.0 mag star TAC +04 07178 = GSC 0231-00966 will be occulted by a 42 km asteroid (136) Austria. This update is based on USNO/Flagstaff astrometry for the asteroid and UCAC2 star position.
The updated path shows ~0.5" S shift with time ~0.7 minutes earlier compared to Edwin Goffin's nominal prediction.
Updated path runs over Ireland ~2:00.4 UT, N England ~2:00.6 UT, S Netherlands and N Belgium ~2:01.0 UT, Germany ~2:01.3 UT, SW Czechia ~2:01.6 UT, NE Austria with Vienna ~2:01.8 UT, SW Slovakia ~2:01.8 UT, Hungary ~2:02.0 UT, Romania ~2:02.4 UT, NE Bulgaria ~2:02.7 UT and Turkey ~2:03.8 UT. Please check the path chart for details.
Here is current station list for European cities and observatories plus other sites.
If you would like to have your station listed with other observatories and sites, send me your request using the structure descripted here
Clear sky and good luck !!!
The event at one glimpse:
* date and approx. UT time of event: November 21, 2004 @ 02:02 UT (Europe)
* magnitude of target star: 12.0
* magnitude drop [mag]: 2.5
* estimated maximum duration [s]: 3.3
* approx. V mag of minor planet at event [mag]: 14.4
* geocentric parallax of minor planet ["]: 4.096
* apparent motion of minor planet ["/h]: 29.25
* angular distance to moon, phase of moon [deg,%]: 147, 70%
* Goffin's original chart reference: A04_1124
The occultation path with path maps:
* approximate ground width [km]: 50
* uncertainty [path widths]: 2.4
* uncertainty in time [s]: 11
* 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 N Hydra, about 3.3 degrees NE of 3.9 mag star theta Hydrae = SAO 117527.
!!! 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: TAC +04 07178 = GSC 0231-00966
* constellation: Hydra
* J2000 position [h,m,s; o,',"]: 09h 24m 37.3220s; +04d 26' 08.655"
* position source: UCAC2
* estimated 1-sigma accuracy ["]: 0.035" (0.028", 0.021")
* R mag [mag]: 12.0
* B-V [mag]: +?.??
* remarks:
Data for the minor planet:
* general information:
number, name: (136) Austria
approx. diameter [km]: 42
* orbital information
orbit source: calculation Manek
source of used astrometry: USNO/Flagstaff (Ron Stone)
number of used observations: 140 USNO
number of rejected observations: 0
time covered by the observations: 1998 01 29 - 2004 01 01
rms residuals ["] (RA,DE): 0.12", 0.12"
estimated positional 2-sigma accuracy at epoch of event ["]: 0.07", 0.04"
remarks:
* orbital elements
Semimajor axis = 2.28642827489389 AU
Eccentricity = 0.085598384059656
Inclination = 9.5715099124456 deg
Long. of node = 186.5487044806500 deg
Arg. of pericenter = 132.4905159330496 deg
Mean anomaly = 155.3357315230765 deg
Epoch of elements : MJD 53330.08000000 TDT (Nov 21, 2004, 1.920000 h)
Path coordinates: click here
Calculator(s): Jan Manek
----------------------------------------------------------------------------
Jan Manek
Werichova 950
152 00 Praha 5 - Barrandov |_|_|
Czech Republic / \
Internet : jan.manek AT worldonline.cz |-O-O-|
--------------------------------------------------------------------U---U---