Last Minute Astrometry for Occultation by (90) Antiope, 2009 Feb 19 (~23:05 UT)

We got some last minute astrometry by Claudine Rinner & François Kugel, IAU A77 Dauban (50cm telescope), France Federico Manzini, IAU A12, Sozzago (40cm telescope), Italy and Raoul Behrend, data reduction, Geneva, Switzerland.

The path has shifted 22.6 km to the south compared to Steve Preston’s prediction from Feb 6 (see station maps of blog Feb 11)

These are the station maps based on this last minute prediction:

Good luck,

Oliver Klös

IOTA-ES

Station Maps for the Occultation by (90) Antiope at Thursday, 2009 February 19 (~ 23:05 UT)

WEST and EAST    

V-Magnitude of target star TYC 0849-01304-1: 12.1 mag
The UCAC2 gives a „pseudo-R magnitude“ of  12.2 mag

THIS IS A BINARY ASTEROID!
Body „A“ will lie at the projected distance 154 km North-West from body „B“ at the occultation time. (J. Lecacheux)

A detailed description of the binary asteroid and the expected occultations can be found here:
Details of Occultation (90) Antiope, 2009 Feb 19

The max duration is expected to be 5.7 sec (Body „A“) and 5.5 sec (Body „B“)  with a max drop of  1.6 mag.
The event will take place at an altitude of 49 deg and at azimuth 155 deg. The sun will be at an altitude of -52 deg. (At predicted centre line for longitude E 10 deg)

The probabilities to see positive event(s) are shown at the legend of the maps and at the „Details“ file.

PLEASE REMEMBER: Predictions are sometimes wrong. Please observe even with a small probability.
Let other observers know about you observing plans: Announce you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_02/0219_90_17281.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090219_17281_Sites.txt

Details from IMCCE:
http://www.imcce.fr/en/ephemerides/phenomenes/occult/target/targobs.php?target=90_Antiope&date=2009-02-19

Map and Coordinates at the web page of  E.A.O.N.:
http://astrosurf.com/eaon/Occultations%20February.htm

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Map for the Occultation by (2114) Wallenquist at Monday, 2009 February 16 (~ 01:48 UT)

V-Magnitude of target star TYC 1894-00123-1: 9.8 mag
Johnson B-V Colour Index: + 0.3
Spectral Type F8
The UCAC2 gives a „pseudo-R magnitude“ of  9.8 mag

The max duration is expected to be 4.5 sec with a max drop of  6.6 mag.
The event will take place at an altitude of 22 deg and at azimuth 280 deg. The sun will be at an altitude of -37 deg. (At predicted centre line for longitude E 15 deg)

There is a 1 sigma uncertainty interval of  ± 2.56 path widths.
The probabilities to see a positive event:

Centre line: ~  16 %
Path limits: ~  15 %
1 sigma lines:  ~ 8 %
2 sigma lines: ~ 1 %

(Calculation according to Raymond Dusser, E.A.O.N. Circular #10)

PLEASE REMEMBER: Predictions are sometimes wrong. Please observe even with a small probability.
Let other observers know about you observing plans: Announce you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_02/0216_2114_17265.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090216_17265_Sites.txt

Map and Coordinates at the web page of  E.A.O.N.:
http://astrosurf.com/eaon/Occultations%20February.htm

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Map for the Occultation by (1963) Bezovec at Sunday, 2009 February 15 (~ 20:52 UT)

V-Magnitude of target star HIP 66890: 8.4 mag
Johnson B-V Colour Index: + 0.4
Spectral Type F5
The UCAC2 gives a „pseudo-R magnitude“ of  8.6 mag

The max duration is expected to be 3.9 sec with a max drop of  6.0 mag.
The event will take place at an altitude of 19 deg and at azimuth 68 deg. The sun will be at an altitude of -36 deg. (At predicted centre line for longitude E 9 deg)

There is a 1 sigma uncertainty interval of  ± 1.04 path widths.
The probabilities to see a positive event:

Centre line: ~  37 %
Path limits: ~  33 %
1 sigma lines:  ~ 13 %
2 sigma lines: ~ 1 %

(Calculation according to Raymond Dusser, E.A.O.N. Circular #10)

PLEASE REMEMBER: Predictions are sometimes wrong. Please observe even with a small probability.
Let other observers know about you observing plans: Announce you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_02/0215_1963_20036.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090215_20036_Sites.txt

Map and Coordinates at the web page of  E.A.O.N.:
http://astrosurf.com/eaon/Occultations%20February.htm

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Maps for the Occultation by (4925) 1981 XH2 at Sunday, 2009 February 15 (~ 00:41 UT)

NORTH and SOUTH

V-Magnitude of target star HIP 32055: 6.3 mag
Johnson B-V Colour Index: + 0.1
Spectral type A2

The max duration is expected to be 4.5 sec with a max drop of 9.6 mag.
The event will take place at an altitude of 23 deg and at azimuth 265 deg. The sun will be at an altitude of -50 deg. (At predicted centre line for longitude E 15 deg)

There is a 1 sigma uncertainty interval of  ±  5.34 path widths.
The probabilities to see a positive event:

Centre line: ~  8 %
Path limits: ~  7 %
1 sigma lines:  ~ 4 %
2 sigma lines: ~ 1 %

(Calculation according to Raymond Dusser, E.A.O.N. Circular #10)

PLEASE REMEMBER: Predictions are sometimes wrong. Please observe even with a small probability.
Let other observers know about you observing plans: Announce you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_02/0215_4925_19905.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090215_19905_Sites.txt

Map and Coordinates at the web page of  E.A.O.N. :
http://astrosurf.com/eaon/Occultations%20February.htm

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Map for the Occultation by (1299) Mertona at Friday, 2009 February 13 (~ 18:45 UT)

V-Magnitude of target star TYC 0742-01423-1: 9.2 mag
Johnson B-V Colour Index: + 0.1
The UCAC2 gives a „pseudo-R magnitude“ of  9.3 mag

The max duration is expected to be 3.7 sec with a max drop of  6.2 mag.
The event will take place at an altitude of 61 deg and at azimuth 164 deg. The sun will be at an altitude of -29 deg. (At predicted centre line for longitude E 20 deg)

There is a 1 sigma uncertainty interval of  ± 2.95 path widths.
The probabilities to see a positive event:

Centre line: ~  14 %
Path limits: ~  13 %
1 sigma lines:  ~ 7 %
2 sigma lines: ~ 1 %

(Calculation according to Raymond Dusser, E.A.O.N. Circular #10)

PLEASE REMEMBER: Predictions are sometimes wrong. Please observe even with a small probability.
Let other observers know about you observing plans: Announce you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_02/0213_1299_18771.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090213_18771_Sites.txt

Map and Coordinates at the web page of  E.A.O.N. (not updated with Steve Preston’s data):
http://astrosurf.com/eaon/Occultations%20February.htm

Good luck with your observation!

Oliver Klös

IOTA-ES