IOTA-ES : Call for Observations

Station Maps for the Occultation by (138) Tolosa at Sunday, 2009 November 08 (~ 18:43 UT)

WEST and EAST

Magnitude of target star 2UCAC 35510128 : 12.5 mag
UCAC instrumental “pseudo-R” fit-model magnitude: 12.6 mag (data from UCAC3)

In the case of an occultation, the combined light of the asteroid and the star will drop by 0.5 mag to 11.8 mag (the magnitude of the asteroid).

The max duration is expected to be 4.1 sec.
The event will take place at an altitude of  28 deg and at azimuth 94 deg. The sun will be at an altitude of -32 deg. (At predicted centre line for longitude E 15 deg)

There is a 1 sigma uncertainty interval of  ± 0.68 path widths.
The probabilities to see a positive event:

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

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_11/1108_138_22691.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091108_22691_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Map for the Occultation by (268) Adorea at Saturday, 2009 November 07 (~ 01:45 UT)

Magnitude of target star 2UCAC 35510128 : 13.3 mag
UCAC instrumental “pseudo-R” fit-model magnitude: 13.2 mag (data from UCAC3)

In the case of an occultation, the combined light of the asteroid and the star will drop by 0.7 mag to 13.2 mag (the magnitude of the asteroid).

The max duration is expected to be 9.5 sec.
The event will take place at an altitude of  37 deg and at azimuth 244 deg. The sun will be at an altitude of -45 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 0.48 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 you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_11/1107_268_22688.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091107_22688_Sites.txt

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Maps for the Occultation by (578) Happelia at Friday, 2009 November 06 (~ 18:31 UT)

SOUTH and NORTH

V-Magnitude of target star TYC 6922-00085-1: 11.4 mag
UCAC instrumental “pseudo-R” fit-model magnitude: 11.8 mag (data from UCAC3)

The max duration is expected to be 2.9 sec with a max drop of 2.6 mag.
The event will take place at an altitude of 20 deg and at azimuth 196 deg. The sun will be at an altitude of -23 deg. (At predicted centre line for longitude E 04 deg 1 min)

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

Centre line: ~ 61 %
Path limits: ~  46 %
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_11/1106_578_22687.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091106_22687_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Maps for the Occultation by (140) Siwa at Thursday, 2009 November 05 (~ 18:35 UT)

SOUTH and NORTH

Magnitude of target star 2UCAC 24492527: 13.4 mag
UCAC instrumental “pseudo-R” fit-model magnitude: 13.5 mag (data from UCAC3)

In the case of an occultation, the combined light of the asteroid and the star will drop by 0.5 mag to 12.7 mag (the magnitude of the asteroid).

The max duration is expected to be 5.4 sec.
The event will take place at an altitude of 19 deg and at azimuth 196 deg. The sun will be at an altitude of -26 deg. (At predicted centre line for longitude E 09 deg 19 min)

There is a 1 sigma uncertainty interval of  ± 1.69 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 you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_11/1105_140_22683.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091105_22683_Sites.txt

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Map for the Occultation by (298) Baptistina at Thursday, 2009 November 05 (~ 17:39 UT)

V-magnitude of target star HIP 110375: 9.2 mag
Spectral type K2
UCAC instrumental “pseudo-R” fit-model magnitude: 8.6 mag (data from UCAC3)

The max duration is expected to be 2.3 sec with a max drop of 6.2 mag.
The event will take place at an altitude of  30 deg and at azimuth 156 deg. The sun will be at an altitude of -13 deg. (At predicted centre line for latitude N 45 deg)

There is a 1 sigma uncertainty interval of  ±  2.40 path widths.
The probabilities to see a positive event:

Centre line: ~ 17 %
Path limits: ~  16 %
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_11/1105_298_18586.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091105_18586_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Map for the Occultation by (2929) Harris at Thursday, 2009 November 05 (~ 04:49 UT)

V-magnitude of target star TYC 0278-00741-1: 8.9 mag
Spectral type K0
Johnson B-V Colour Index: + 1.0
UCAC instrumental “pseudo-R” fit-model magnitude: 8.6 mag (data from UCAC3)

The max duration is expected to be 0.7 sec with a max drop of 8.5 mag.
The event will take place at an altitude of  23 deg and at azimuth 102 deg. The sun will be at an altitude of -24 deg. (At predicted centre line for longitude W 05 deg)

There is a 1 sigma uncertainty interval of  ± 3.63 path widths.
The probabilities to see a positive event:

Centre line: ~ 11 %
Path limits: ~  11 %
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_11/1105_2929_18927.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091105_18927_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Map for the Occultation by (636) Erika at Wednesday, 2009 November 04 (~ 19:34 UT)

Magnitude of target star 2UCAC 38376807: 12.9 mag
UCAC instrumental “pseudo-R” fit-model magnitude: 12.9 mag (data from UCAC3)

In the case of an occultation, the combined light of the asteroid and the star will drop by 0.8 mag to 13.0 mag (the magnitude of the asteroid).

The max duration is expected to be 6.3 sec.
The event will take place at an altitude of  34 deg and at azimuth 110 deg. The sun will be at an altitude of -33 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 0.97 path widths.
The probabilities to see a positive event:

Centre line: ~ 40 %
Path limits: ~  35 %
1 sigma lines:  ~ 14 %
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_11/1104_636_22679.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091104_22679_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Map for the Occultation by (1082) Pirola at Wednesday, 2009 November 04 (~ 16:30 UT)

V-magnitude of target star TYC 6295-00097-1: 10.9 mag
Johnson B-V Colour Index: + 0.8
UCAC instrumental “pseudo-R” fit-model magnitude: 11.1 mag (data from UCAC3)

The max duration is expected to be 3.3 sec with a max drop of 2.4 mag.
The event will take place at an altitude of  16 deg and at azimuth 202 deg. The sun will be at an altitude of -12 deg. (At predicted centre line for longitude E 16 deg)

There is a 1 sigma uncertainty interval of  ± 1.40 path widths.
The probabilities to see a positive event:

Centre line: ~ 28 %
Path limits: ~  26 %
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 you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_11/1104_1082_22678.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091104_22678_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Map  for the Occultation by (31867) 2000 EG94 at Tuesday, 2009 November 03 (~ 20:32 UT)

Video observation!
Very short occultation of a bright star!

V-magnitude of target star HIP 109074:  3.0 mag
Spectral type G0
Johnson B-V Colour Index: + 1.0

The max duration is expected to be 0.4 sec with a max drop of 13.9 mag.
The event will take place at an altitude of  34 deg and at azimuth 217 deg. The sun will be at an altitude of -44 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 9.3 path widths.
The probabilities to see a positive event:

Centre line: ~ 4 %
Path limits: ~  4 %
1 sigma lines:  ~ 3 %
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_11/1103_31867_23064.htm

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

Good luck with your observation!

Oliver Klös

IOTA-ES

Station Maps for the Occultation by (714) Ulula at Monday, 2009 November 02 (~ 17:31 UT)

WEST and EAST

V-magnitude of target star TYC 0546-00184-1: 11.6 mag
Johnson B-V Colour Index: + 1.0
UCAC instrumental “pseudo-R” fit-model magnitude: 10.9 mag (data from UCAC3)

The max duration is expected to be 3.3 sec with a max drop of 2.4 mag.
The event will take place at an altitude of  40 deg and at azimuth 170 deg. The sun will be at an altitude of -16 deg. (At predicted centre line for logitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 1.23 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 you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_11/1102_714_18108.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091102_18108_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES