Archive for Februar, 2009

Mittwoch, Februar 18th, 2009

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:
(90) Antiope, 2009 Feb 19, UPDATED Station Map WEST(90) Antiope, 2009 Feb 19, UPDATED Station Map EAST
Good luck,

Oliver Klös

IOTA-ES

Mittwoch, Februar 11th, 2009

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

(90) Antiope, 2009 Feb 19, Station Map WEST(90) Antiope, 2009 Feb 19, Station Map EAST

Mittwoch, Februar 11th, 2009

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

(2114) Wallenquist, 2009 Feb 16, Station Map

Mittwoch, Februar 11th, 2009

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

(1963) Bezovec, 2009 Feb 15, Station Map

Mittwoch, Februar 11th, 2009

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

(4925) 1981 XH2, 2009 Feb 15, Station Map NORTH(4925) 1981 XH2, 2009 Feb 15, Station Map SOUTH

Mittwoch, Februar 11th, 2009

Station Map for the Occultation by (105) Artemis at Thursday, 2009 January 15 (~ 21:34 UT)

V-Magnitude of target star TYC 5369-01307-1: 10.7 mag
Johnson B-V Colour Index: + 0.4
The UCAC2 gives a „pseudo-R magnitude“ of  10.8 mag

The max duration is expected to be 8.9 sec with a max drop of 2.2 mag.
The event will take place at an altitude of  34 deg and at azimuth 156 deg. The sun will be at an altitude of – 51 deg. (At predicted centre line for longitude 0 deg)

There is a 1 sigma uncertainty interval of  ± 0.31  path widths.
The probabilities to see a positive event:

Centre line: ~  90 %
Path limits: ~  50 %
1 sigma lines:  ~ 16 %
2 sigma lines: ~ 2 %

(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_01/0115_105_17170.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090115_17170_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%20January.htm

Good luck with your observation!

Oliver Klös

IOTA-ES

(105) Artemis, 2009 Jan 15, Station Map

Mittwoch, Februar 11th, 2009

Station Maps for the Occultation by (639) Latona at Thursday, 2009 January 15 (~ 21:08 UT)

EAST and WEST

V-Magnitude of target star TYC 1864-00746-1: 10.4 mag
Johnson B-V Colour Index: + 0.3
The UCAC2 gives a „pseudo-R magnitude“ of  10.3 mag

The max duration is expected to be 6.3 sec with a max drop of 2.6 mag.
The event will take place at an altitude of  64 deg and at azimuth 162 deg. The sun will be at an altitude of – 51 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ±  0.50 path widths.
The probabilities to see a positive event:

Centre line: ~  68 %
Path limits: ~  48 %
1 sigma lines:  ~ 16 %
2 sigma lines: ~ 2 %

(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_01/0115_639_17169.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090115_17169_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%20January.htm

Good luck with your observation!

Oliver Klös

IOTA-ES

(639) Latona, 2009 Jan 15, Station Map WEST(639) Latona, 2009 Jan 15, Station Map EAST

Mittwoch, Februar 11th, 2009

Station Map for the Occultation by (4711) Kathy at Thursday, 2009 January 15 (~ 18:30 UT)

V-Magnitude of target star TYC 0042-01409-1: 9.1 mag
Johnson B-V Colour Index: + 1.1
Spectral type K0
The UCAC2 gives a „pseudo-R magnitude“ of  8.9 mag

The max duration is expected to be 0.7 sec with a max drop of 6.9 mag.
The event will take place at an altitude of  41 deg and at azimuth 177 deg. The sun will be at an altitude of – 20 deg. (At predicted centre line for longitude 0 deg)

There is a 1 sigma uncertainty interval of  ±  3.86 path widths.
The probabilities to see a positive event:

Centre line: ~  10 %
Path limits: ~  10 %
1 sigma lines:  ~ 6 %
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_01/0115_4711_18999.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090115_18999_Sites.txt

Good luck with your observation!

Oliver Klös

IOTA-ES

(4711) Kathy, 2009 Jan 15, Station Map

Mittwoch, Februar 11th, 2009

Station Map for the Occultation by (307) Nike at Wednesday, 2009 January 14 (~ 20.42 UT)

V-Magnitude of target star HIP 6630: 8.6 mag
Johnson B-V Colour Index: + 0.5
Spectral type F8
The UCAC2 gives a „pseudo-R magnitude“ of 8.7 mag

The max duration is expected to be 2.7 sec with a max drop of 6.5 mag.
The event will take place at an altitude of 36 deg and at azimuth 239 deg. The sun will be at an altitude of -42 deg. (At predicted centre line for longitude 0 deg)

There is a 1 sigma uncertainty interval of  ±  0.53 path widths.
The probabilities to see a positive event:

Centre line: ~ 66 %
Path limits: ~  47 %
1 sigma lines:  ~ 16 %
2 sigma lines: ~ 2 %

(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_01/0114_307_18589.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090114_18589_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%20January.htm

Good luck with your observation!

Oliver Klös

IOTA-ES

(307) Nike, 2009 Jan 14, Station Map

Dienstag, Februar 10th, 2009

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

(1299) Mertona, 2009 Feb 13, Station Map