IOTA-ES : Call for Observations

Station Maps for the Occultation by (912) Maritima at Sunday, 2011 September 25 (~ 03:51 UT)

WEST and EAST

V-Magnitude of target star TYC 2447-00490-1: 9.9 mag
UCAC instrumental “pseudo-R” fit-model magnitude: 9.1 mag (data from UCAC3)

The max duration is expected to be 3.5 sec with a max drop of 3.8 mag.
The event will take place at an altitude of 62 deg and at azimuth 102 deg. The sun will be at an altitude of -17 deg. (At predicted centre line for longitude E 05 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 your station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2011_09/0925_912_24073.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20110925_24073_Sites.txt

Good luck with your observation!

Oliver Klös
IOTA-ES

Station Map for the Occultation by (1036) Ganymed at Sunday, 2011 September 25 (~ 02:46 UT)

V-Magnitude of target star TYC 3670-00426-1: 11.4 mag
Johnson B-V Colour Index: + 1.1
UCAC instrumental “pseudo-R” fit-model magnitude: 11.0 mag (data from UCAC3)

Please notice:
In the case of an occultation, the combined light of the asteroid and the star will drop by 0.2 mag to 9.3 mag (the magnitude of the asteroid).

OCCULTATION BY A NEA (Near Earth Asteroid)!
There are more occultations to come in the next months crossing Europe!
Have a look for future events at the special webpage:
http://www.iota-es.de/ganymed_2011.html

The max duration is expected to be 3.0 sec with a max drop of 0.15 mag.
The event will take place at an altitude of 72 deg and at azimuth 289 deg. The sun will be at an altitude of -24 deg. (At predicted centre line for latitude N 52 deg 6min)

There is a 1 sigma uncertainty interval of  ± 0.44 path widths.
The probabilities to see a positive event:

Centre line: ~ 74 %
Path limits: ~  49 %
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 your station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2011_09/0925_1036_24072.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20110925_24072_Sites.txt

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Map for the Occultation by (429) Lotis at Wednesday, 2011 September 21 (~ 02:52 UT)

V-Magnitude of target star TYC 1319-01856-1: 11.5 mag
Johnson B-V Colour Index: + 0.0
UCAC instrumental “pseudo-R” fit-model magnitude: 11.1 mag (data from UCAC3)

The max duration is expected to be 3.2 sec with a max drop of 3.2 mag.
The event will take place at an altitude of 45 deg and at azimuth 113 deg. The sun will be at an altitude of -23 deg. (At predicted centre line for longitude E 15 deg)

There is a 1 sigma uncertainty interval of  ± 0.70 path widths.
The probabilities to see a positive event:

Centre line: ~ 53 %
Path limits: ~ 42 %
1 sigma lines:  ~ 15 %
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 your station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2011_09/0921_429_24061.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20110921_24061_Sites.txt

Good luck with your observation!

Oliver Klös
IOTA-ES

Station Map for the Occultation by (895) Helio at Tuesday, 2011 September 20 (~ 18:11 UT)

V-Magnitude of target star TYC 2764-01038-1: 12.5 mag
Johnson B-V Colour Index: + 0.9
UCAC instrumental “pseudo-R” fit-model magnitude: 13.1 mag (data from UCAC3)

Please notice:
In the case of an occultation, the combined light of the asteroid and the star will drop by 1.2 mag to 13.2 mag (the magnitude of the asteroid).

The max duration is expected to be 11.7 sec with a max drop of 1.2 mag.
The event will take place at an altitude of 44 deg and at azimuth 83 deg. The sun will be at an altitude of -12 deg. (At predicted centre line for longitude E 15 deg)

There is a 1 sigma uncertainty interval of  ± 0.47 path widths.
The probabilities to see a positive event:

Centre line: ~ 71 %
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 your station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2011_09/0920_895_24059.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20110920_24059_Sites.txt

Good luck with your observation!

Oliver Klös
IOTA-ES

Station Maps for the Occultation by (372) Palma at Wednesday, 2011 August 10 (~ 22:09 UT)

NORTH and SOUTH

Magnitude of target star 2UCAC 42524779: 13.3 mag
UCAC instrumental “pseudo-R” fit-model magnitude: 13.3 mag (data from UCAC3)

Please notice:
In the case of an occultation, the combined light of the asteroid and the star will drop by 0.3 mag to 12.2 mag (the magnitude of the asteroid).

The max duration is expected to be 12.4 sec with a max drop of 0.34 mag.
The event will take place at an altitude of 29 deg and at azimuth 75 deg. The sun will be at an altitude of -25 deg. (At predicted centre line for longitude E 11 deg 3 min)

There is a 1 sigma uncertainty interval of  ± 0.59 path widths.
The probabilities to see a positive event:

Centre line: ~ 60 %
Path limits: ~ 45 %
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 your station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2011_08/0810_372_28542.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20110810_28542_Sites.txt

Good luck with your observation!

Oliver Klös
IOTA-ES

Station Map for the Occultation by (1036) Ganymed at Saturday, 2011 August 06 (~ 22:50 UT)

V-Magnitude of target star TYC 4264-01166-1: 12.2 mag
Johnson B-V Colour Index: + 0.4
UCAC instrumental “pseudo-R” fit-model magnitude: 11.6 mag (data from UCAC3)

Please notice:
In the case of an occultation, the combined light of the asteroid and the star will drop by 0.2 mag to 10.5 mag (the magnitude of the asteroid).

OCCULTATION BY A NEA (Near Earth Asteroid)!
There are more occultations to come in the next months crossing Europe!
Have a look for future events at the special webpage:
http://www.iota-es.de/ganymed_2011.html

The max duration is expected to be 3.6 sec with a max drop of 0.21 mag.
The event will take place at an altitude of 71 deg and at azimuth 36 deg. The sun will be at an altitude of -26 deg. (At predicted centre line for longitude E 17 deg)

There is a 1 sigma uncertainty interval of  ± 0.65 path widths.
The probabilities to see a positive event:

Centre line: ~ 54 %
Path limits: ~  44 %
1 sigma lines:  ~ 15 %
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 your station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2011_08/0806_1036_23940.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20110806_23940_Sites.txt

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Map for the Occultation by (1036) Ganymed at Thursday, 2011 June 16 (~ 22:19 UT)

V-Magnitude of target star TYC 2695-02598-1: 12.3 mag
Johnson B-V Colour Index: + 1.2
UCAC instrumental “pseudo-R” fit-model magnitude: 12.6 mag (data from UCAC3)

Please notice:
In the case of an occultation, the combined light of the asteroid and the star will drop by 0.4 mag to 11.3 mag (the magnitude of the asteroid).

OCCULTATION BY A NEA (Near Earth Asteroid)!
There are more occultations to come in the next months crossing Europe!
Have a look for future events at the special webpage:
http://www.iota-es.de/ganymed_2011.html

The max duration is expected to be 1.7 sec with a max drop of 0.36 mag.
The event will take place at an altitude of 38 deg and at azimuth 78 deg. The sun will be at an altitude of -18 deg. (At predicted centre line for longitude E 05 deg 02 min)

There is a 1 sigma uncertainty interval of  ± 0.65 path widths.
The probabilities to see a positive event:

Centre line: ~ 54 %
Path limits: ~  43 %
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 your station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2011_06/0616_1036_26105.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20110616_26105_Sites.txt
Good luck with your observation!

Oliver Klös

IOTA-ES

Station Map for the Occultation by (17) Thetis at Sunday, 2011 June 05 (~ 21:09 UT)

V-Magnitude of target star TYC 0844-00483-1: 11.3 mag
Johnson B-V Colour Index: + 0.4
UCAC instrumental “pseudo-R” fit-model magnitude: 11.2 mag (data from UCAC3)

The max duration is expected to be 3.8 sec with a max drop of 1.7 mag.
The event will take place at an altitude of 36 deg and at azimuth 255 deg. The sun will be at an altitude of -14 deg. (At predicted centre line for longitude 0 deg)

There is a 1 sigma uncertainty interval of  ± 0.5 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 your station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2011_06/0605_17_23787.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20110605_23787_Sites.txt

Good luck with your observation!

Oliver Klös
IOTA-ES

Station Map for the Occultation by (1264) Letaba at Saturday, 2011 June 04 (~ 21:53 UT)

Magnitude of target star 2UCAC 33283396: 13.5 mag
UCAC instrumental “pseudo-R” fit-model magnitude: 14.3 mag (data from UCAC3)

Please notice:
In the case of an occultation, the combined light of the asteroid and the star will drop by 0.5 mag to 13.0 mag (the magnitude of the asteroid).

The max duration is expected to be 5.9 sec with a max drop of 0.5 mag.
The event will take place at an altitude of 23 deg and at azimuth 113 deg. The sun will be at an altitude of -15 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 1.21 path widths.
The probabilities to see a positive event:

Centre line: ~ 32 %
Path limits: ~ 29 %
1 sigma lines:  ~ 12 %
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 your station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2011_06/0604_1264_26086.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20110604_26086_Sites.txt

Good luck with your observation!

Oliver Klös
IOTA-ES

Station Map for the Occultation by (897) Lysistrata at Friday, 2011 June 03 (~ 23:21 UT)

V-Magnitude of target star TYC 26285-02638-1: 11.2 mag
Johnson B-V Colour Index: + 0.7
UCAC instrumental “pseudo-R” fit-model magnitude: 10.9 mag (data from UCAC3)

The max duration is expected to be 2.6 sec with a max drop of 2.5 mag.
The event will take place at an altitude of 19 deg and at azimuth 139 deg. The sun will be at an altitude of -25 deg. (At predicted centre line for longitude 0 deg)

There is a 1 sigma uncertainty interval of  ± 1.75 path widths.
The probabilities to see a positive event:

Centre line: ~ 23 %
Path limits: ~ 22 %
1 sigma lines:  ~ 10 %
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 your station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2011_06/0603_897_26085.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20110603_26085_Sites.txt

Good luck with your observation!

Oliver Klös
IOTA-ES