IOTA-ES : Call for Observations

Station Map for the Occultation by (1144) Oda at Monday, 2008 December 15  (~ 22:46 UT)

V-Magnitude of target star TYC 0720-00214-1: 10.3 mag
Spectral type G0
Johnson B-V Colour Index: + 0.6
The UCAC2 gives a “pseudo-R magnitude” of  10.1 mag

The max duration is expected to be 4.0 sec with a max drop of 4.9 mag.
The event will take place at an altitude of 53 deg and at azimuth 150 deg. The sun will be at an altitude of -67 deg. (At predicted centre line for longitude E 05 deg)

There is a 1 sigma uncertainty interval of  ±  1.14 path widths.
The probabilities to see a positive event:

Centre line: ~ 34 %
Path limits: ~  31 %
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/2008_12/1215_1144_14221.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081215_14221_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 (943) Begonia at Monday, 2008 December 15  (~ 20:18 UT)

V-Magnitude of target star TYC 5266-00737-1: 11.9 mag
Johnson B-V Colour Index: + 0.5
The UCAC2 gives a “pseudo-R magnitude” of  11.5 mag

The max duration is expected to be 4.8 sec with a max drop of 9.6 mag.
The event will take place at an altitude of  19 deg and at azimuth 209 deg. The sun will be at an altitude of -39 deg. (At predicted centre line for longitude 0 deg)

There is a 1 sigma uncertainty interval of  ±  0.97 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_12/1215_943_13383.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081215_13383_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 (5900) Jensen at Monday, 2008 December 15  (~ 16:50 UT)

V-Magnitude of target star TYC 0572-00382-1: 10.4 mag
Johnson B-V Colour Index: + 0.8
The UCAC2 gives a “pseudo-R magnitude” of  10.0  mag

The max duration is expected to be 1.3 sec with a max drop of 6.8 mag.
The event will take place at an altitude of  44 deg and at azimuth 184 deg. The sun will be at an altitude of -13 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ±  3.12 path widths.
The probabilities to see a positive event:

Centre line: ~ 13 %
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/2008_12/1215_5900_14951.htm
Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081215_14951_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 (2531) Cambridge at Monday, 2008 December 15  (~ 01:44 UT)

V-Magnitude of target star TYC 1322-01460-1: 9.5 mag
Johnson B-V Colour Index: + 0.8
The UCAC2 gives a “pseudo-R magnitude” of  9.5 mag

The max duration is expected to be 1.5 sec with a max drop of 5.5 mag.
The event will take place at an altitude of  49 deg and at azimuth 221 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  ±  4.40 path widths.
The probabilities to see a positive event:

Centre line: ~ 9 %
Path limits: ~  9 %
1 sigma lines:  ~5 %
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_12/1215_2531_14659.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081215_14659_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 (3687) Dzus at Sunday, 2008 December 14  (~ 23:33 UT)

EAST and WEST

V-Magnitude of target star TYC 0178-00184-1: 10.3 mag
Spectral type K0
Johnson B-V Colour Index: + 0.1
The UCAC2 gives a “pseudo-R magnitude” of  10.2 mag

The max duration is expected to be 2.4 sec with a max drop of 5.9 mag.
The event will take place at an altitude of  37 deg and at azimuth 146 deg. The sun will be at an altitude of -63 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ±  3.17 path widths.
The probabilities to see a positive event:

Centre line: ~ 13 %
Path limits: ~  12 %
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/2008_12/1214_3687_14814.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081214_14814_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 (1240) Centenaria at Wednesday, 2008 December 10  (~03:19  UT)

Trans-Atlantic Event!
Path is crossing the U.S.A. and Mexico too.

Magnitude of target star 2UCAC 4463928: 13.0 mag

The max duration is expected to be 4.6 sec with a max drop of 1.2 mag.
The event will take place at an altitude of  57 deg and at azimuth 275 deg. The sun will be at an altitude of -45 deg. (At predicted centre line for longitude W 02 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/2008_12/1210_1240_19745.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081210_19745_Sites.txt

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Maps for the Occultation by (844) Leontina at Wednesday, 2008 December 10  (~01:14  UT)
EAST and WEST

Trans-Atlantic Event!

Path is crossing Canada, the U.S.A. and Mexico too.

Magnitude of target star 2UCAC 44280930: 12.6 mag

The max duration is expected to be 4.8 sec with a max drop of 1.7 mag.
The event will take place at an altitude of  69 deg and at azimuth 218 deg. The sun will be at an altitude of -55 deg. (At predicted centre line for longitude 0 deg)

There is a 1 sigma uncertainty interval of  ±  1.43 path widths.
The probabilities to see a positive event:

Centre line: ~ 27 %
Path limits: ~  26 %
1 sigma lines:  ~11 %
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_12/1210_844_20141.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081210_20141_Sites.txt

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Maps for the Occultation by (462) Eriphyla at Monday, 2008 December 08  (~ 19:47 UT)

EAST and WEST
V-Magnitude of target star TYC 1373-00570-1: 10.6 mag
Johnson B-V Colour Index: + 0.9
The UCAC2 gives a “pseudo-R magnitude” of  10.5 mag

The max duration is expected to be 4.6 sec with a max drop of 3.4 mag.
The event will take place at an altitude of  18 deg and at azimuth 78 deg. The sun will be at an altitude of -46 deg. (At predicted centre line for longitude E 15 deg)

There is a 1 sigma uncertainty interval of  ±  0.97 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_12/1208_462_19669.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081208_19669_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 (361) Bononia at Saturday, 2008 December 06  (~ 02:16 UT)

SUSPECTED DOUBLE ASTEROID!
Trans-Atlantic Event!   Path is crossing Canada too.

V-Magnitude of target star TYC 1789-00112-1: 10.4 mag
Spectral Type: A2
Johnson B-V Colour Index: + 0.3
The UCAC2 gives a “pseudo-R magnitude” of  10.5 mag

The max duration is expected to be 14.6 sec with a max drop of 2.8  mag.
The event will take place at an altitude of  27 deg and at azimuth 280 deg. The sun will be at an altitude of -39 deg. (At predicted centre line for longitude E 15 deg)

There is a 1 sigma uncertainty interval of  ±  0.33 path widths.
The probabilities to see a positive event:

Centre line: ~ 87 %
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_12/1206_361_13354.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081206_13354_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 (844) Leontina at Wednesday, 2008 December 03  (~ 19:12 UT)

V-Magnitude of target star TYC 2416-00841-1: 11.4 mag
Johnson B-V Colour Index: + 0.4
The UCAC2 gives a “pseudo-R magnitude” of  11.5 mag

The max duration is expected to be 5.0 sec with a max drop of 2.9 mag.
The event will take place at an altitude of  29 deg and at azimuth 69 deg. The sun will be at an altitude of -27 deg. (At predicted centre line for longitude W 05 deg)

There is a 1 sigma uncertainty interval of  ±  0.62 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_12/1203_844_13346.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081203_13346_Sites.txt

Good luck with your observation,

Oliver Klös

IOTA-ES