IOTA-ES : Call for Observations

Station Map for the Occultation by (1596) Itzigsohn at Tuesday, 2008 December 23 (~ 20:11 UT)

V-Magnitude of target star HIP 23642: 9.3 mag
Spectral type F5
Johnson B-V Colour Index: + 0.4
The UCAC2 gives a “pseudo-R magnitude” of  9.2 mag

The max duration is expected to be 4.6 sec with a max drop of 4.7 mag.
The event will take place at an altitude of 45 deg and at azimuth 129 deg. The sun will be at an altitude of -41 deg. (At predicted centre line for longitude E 05 deg)

There is a 1 sigma uncertainty interval of  ±  0.61 path widths.
The probabilities to see a positive event:

Centre line: ~ 58 %
Path limits: ~  45 %
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/2008_12/1223_1596_13416.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081223_13416_Sites.txt

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

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Map for the Occultation by (192) Nausikaa at Monday, 2008 December 22 (~ 00:02 UT)

V-Magnitude of target star TYC 1409-00617-1: 11.4 mag
Johnson B-V Colour Index: + 0.1
The UCAC2 gives a “pseudo-R magnitude” of  11.2 mag

The max duration is expected to be 24.0 sec with a max drop of 0.7 mag.
The event will take place at an altitude of 47 deg and at azimuth 113 deg. The sun will be at an altitude of -63 deg. (At predicted centre line for longitude E 09 deg)

There is a 1 sigma uncertainty interval of  ±  0.25 path widths.
The probabilities to see a positive event:

Centre line: ~ 96 %
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/2008_12/1221_192_13409.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081221_13409_Sites.txt

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

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Map for the Occultation by (436) Patricia at Sunday, 2008 December 21 (~ 21:03 UT)

V-Magnitude of target star TYC 23407-03143-1 11.8 mag
Johnson B-V Colour Index: + 0.6
The UCAC2 gives a “pseudo-R magnitude” of  11.6 mag

The max duration is expected to be 5.1 sec with a max drop of 3.0 mag.
The event will take place at an altitude of 50 deg and at azimuth 80 deg. The sun will be at an altitude of -48 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ±  0.76 path widths.
The probabilities to see a positive event:

Centre line: ~ 49 %
Path limits: ~  41 %
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/2008_12/1221_436_13408.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081221_13408_Sites.txt

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

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Map for the Occultation by (1964) Walraven at Sunday, 2008 December 21 (~ 04:55 UT)

V-Magnitude of target star TYC 2401-00144-1: 10.4 mag
Johnson B-V Colour Index: + 0.5
The UCAC2 gives a “pseudo-R magnitude” of  10.2 mag

The max duration is expected to be 1.5 sec with a max drop of 4.1 mag.
The event will take place at an altitude of 18 deg and at azimuth 306 deg. The sun will be at an altitude of -15 deg. (At predicted centre line for longitude E 20 deg)

There is a 1 sigma uncertainty interval of  ±  1.93 path widths.
The probabilities to see a positive event:

Centre line: ~ 20 %
Path limits: ~  20 %
1 sigma lines:  ~9 %
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/2008_12/1221_1946_14523.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081221_14523_Sites.txt

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Map for the Occultation by (312) Pierretta at Saturday, 2008 December 20 (~ 19:35 UT)

V-Magnitude of target star TYC 2397-00753-1: 12.0 mag
Johnson B-V Colour Index: + 0.2
The UCAC2 gives a “pseudo-R magnitude” of  11.9 mag

The max duration is expected to be 3.4 sec with a max drop of 1.8 mag.
The event will take place at an altitude of 59 deg and at azimuth 94 deg. The sun will be at an altitude of -44 deg. (At predicted centre line for longitude E 15 deg)

There is a 1 sigma uncertainty interval of  ±  0.73 path widths.
The probabilities to see a positive event:

Centre line: ~ 51 %
Path limits: ~  41 %
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/2008_12/1220_312_13402.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081220_13402_Sites.txt

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

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Map for the Occultation by (1251) Hedera at Friday 2008 December 19 (~ 21:58 UT)

V-Magnitude of target star TYC 1315-01390-1: 10.6 mag
Johnson B-V Colour Index: + 0.0
The UCAC2 gives a “pseudo-R magnitude” of  10.5 mag

The max duration is expected to be 2.2 sec with a max drop of 3.5 mag.
The event will take place at an altitude of 51 deg and at azimuth 126 deg. The sun will be at an altitude of -61 deg. (At predicted centre line for longitude E 05 deg)

There is a 1 sigma uncertainty interval of  ±  1.34 path widths.
The probabilities to see a positive event:

Centre line: ~ 29 %
Path limits: ~  27 %
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/2008_12/1219_1251_19705.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081219_19705_Sites.txt

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

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Maps  for the Occultation by (3092) Herodotus at Friday, 2008 December 19  (~03:14 UT)

 EAST and WEST

Trans-Atlantic-Event!
Path will cross Canada and the U.S.A. too.

V-Magnitude of target star HIP 36112: 9.2 mag
Spectral type K0
Johnson B-V Colour Index: + 0.9
The UCAC2 gives a “pseudo-R magnitude” of  9.1 mag

The max duration is expected to be 2.7 sec with a max drop of 7.1 mag.
The event will take place at an altitude of  62 deg and at azimuth 261 deg. The sun will be at an altitude of -37 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ±  3.79 path widths.
The probabilities to see a positive event:

Centre line: ~ 11%
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/2008_12/1219_3092_14742.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081219_14742_Sites.txt

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

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Maps for the Occultation by (828) Lindemannia at Thursday, 2008 December 18  (~16:56 UT)

EAST and WEST

V-Magnitude of target star TYC 1262-00338-1: 11.1 mag
Johnson B-V Colour Index: + 0.8
The UCAC2 gives a “pseudo-R magnitude” of  10.6 mag

The max duration is expected to be 4.7 sec with a max drop of 4.2 mag.
The event will take place at an altitude of  30 deg and at azimuth 90 deg. The sun will be at an altitude of -14 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ±  0.96 path widths.
The probabilities to see a positive event:

Centre line: ~ 39 %
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/2008_12/1218_828_13395.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081218_13395_Sites.txt

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

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Map for the Occultation by (86) Semele at Thursday, 2008 December 18  (~ 04:01 UT)

V-Magnitude of target star TYC 1848-02237-1: 11.3 mag
Johnson B-V Colour Index: + 1.2
The UCAC2 gives a “pseudo-R magnitude” of  11.0 mag

The max duration is expected to be 11.2 sec with a max drop of 1.1 mag.
The event will take place at an altitude of 34 deg and at azimuth 271 deg. The sun will be at an altitude of -37 deg. (At predicted centre line for longitude W 01 deg)

There is a 1 sigma uncertainty interval of  ±  0.28 path widths.
The probabilities to see a positive event:

Centre line: ~ 93 %
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/2008_12/1218_86_13390.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081218_13390_Sites.txt

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

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Map for the Occultation by (2291) Kevo at Wednesday, 2008 December 17  (~ 22:50 UT)

V-Magnitude of target star TYC 5384-01143-1: 11.3 mag
Johnson B-V Colour Index: + 0.3
The UCAC2 gives a “pseudo-R magnitude” of  11.3 mag

The max duration is expected to be 3.2 sec with a max drop of 4.1 mag.
The event will take place at an altitude of 20 deg and at azimuth 153 deg. The sun will be at an altitude of -57 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ±  2.38 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/2008_12/1217_2291_19699.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081217_19699_Sites.txt
Map and Coordinates at the web page of  E.A.O.N. (not updated with Steve Preston’s latest data):
http://astrosurf.com/eaon/Occultations%20December.htm

Good luck with your observation,

Oliver Klös

IOTA-ES