Archive for November, 2009

Montag, November 30th, 2009

Station Map for the Occultation by (38) Leda at Wednesday, 2009 December 02 (~ 22:21 UT)

Magnitude of target star 2UCAC 42546290: 11.7 mag
UCAC instrumental „pseudo-R“ fit-model magnitude: 11.9 mag (data from UCAC3)

The max duration is expected to be 12.4 sec with a max drop of 0.6 mag.
The event will take place at an altitude of 57 deg and at azimuth 144 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  ± 0.52 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_12/1202_38_18206.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091202_18206_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES

(38) Leda, 2009 Dec 02, Station Map

Montag, November 30th, 2009

Station Map for the Occultation by (993) Moutona at Wednesday, 2009 December 02 (~ 04:46 UT)

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

V-Magnitude of target star TYC 1338-00241-1: 10.5 mag
UCAC instrumental „pseudo-R“ fit-model magnitude: 10.1 mag (data from UCAC3)

The max duration is expected to be 2.2 sec with a max drop of 5.0 mag.
The event will take place at an altitude of 44 deg and at azimuth 254 deg. The sun will be at an altitude of -22 deg. (At predicted centre line for longitude E 05 deg)

There is a 1 sigma uncertainty interval of  ± 2.77 path widths.
The probabilities to see a positive event:

Centre line: ~  14 %
Path limits: ~  14 %
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_12/1202_993_18714.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091202_18714_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES

(993) Moutona, 2009 Dec 02, Station Map

Freitag, November 27th, 2009

Station Map for the Occultation by (405) Thia at Sunday, 2009 November 29 (~ 04:46 UT)

V-Magnitude of target star TYC 1336-01533-1: 11.1 mag
Johnson B-V Colour Index: + 0.5
UCAC instrumental „pseudo-R“ fit-model magnitude: 11.4 mag (data from UCAC3)

The max duration is expected to be 12.4sec with a max drop of 1.7 mag.
The event will take place at an altitude of 53 deg and at azimuth 252 deg. The sun will be at an altitude of -28 deg. (At predicted centre line for longitude W 05 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/2009_11/1129_405_18191.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091129_18191_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

(405) Thia, 2009 November 29, Station Map


Freitag, November 27th, 2009

Station Map for the Occultation by (505) Cava at Sunday, 2009 November 29 (~ 01:41 UT)

V-Magnitude of target star TYC 1422-00911-1: 10.3 mag
Johnson B-V Colour Index: + 0.9
UCAC instrumental „pseudo-R“ fit-model magnitude: 10.0 mag (data from UCAC3)

The max duration is expected to be 8.0 sec with a max drop of 2.9 mag.
The event will take place at an altitude of 36 deg and at azimuth 118 deg. The sun will be at an altitude of -43 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 0.30 path widths.
The probabilities to see a positive event:

Centre line: ~  91 %
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_11/1129_505_18189.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091129_18189_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

(505) Cava, 2009 Nov 29, Station Map

Freitag, November 27th, 2009

Station Map for the Occultation by (546) Herodias at Saturday, 2009 November 28 (~ 17:58 UT)

Magnitude of target star 2UCAC 41484931: 13.1 mag
UCAC instrumental „pseudo-R“ fit-model magnitude: 13.1 mag (data from UCAC3)

In the case of an occultation, the combined light of the asteroid and the star will drop by 0.9 mag to 13.3 mag (the magnitude of the asteroid).

The max duration is expected to be 6.5 sec.
The event will take place at an altitude of 47 deg and at azimuth 96 deg. The sun will be at an altitude of -24 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 1.05 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_11/1128_546_22745.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091128_22745_Sites.txt

Good luck with your observation!

Oliver Klös

IOTA-ES

(546) Herodias, 2009 Nov 28, Station Map

Freitag, November 27th, 2009

Station Maps for the Occultation by (27666) 1978 VU6 at Friday, 2009 November 27 (~ 21:01 UT)

WEST and EAST

BRIGHT STAR  BUT VERY SHORT DURATION.
VIDEO OBSERVATION NEEDED!

V-Magnitude of target star HIP 20789  (72 Tau) : 5.5 mag
Spectral type B5
Johnson B-V Colour Index: – 0.1
UCAC instrumental „pseudo-R“ fit-model magnitude: 5.7 mag (data from UCAC3)

The max duration is expected to be 0.5 sec with a max drop of 11.1 mag.
The event will take place at an altitude of 42 deg and at azimuth 95 deg. The sun will be at an altitude of -43 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 20.09 path widths.
The probabilities to see a positive event:

Centre line: ~  2 %
Path limits: ~  2 %
1 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_11/1127_27666_23076.htm

Good luck with your observation!

Oliver Klös

IOTA-ES

(27666) 1978 VU6, 2009 Nov 27, Station Map WEST(27666) 1978 VU6, 2009 Nov 27, Station Map EAST

Sonntag, November 22nd, 2009

Station Map for the Occultation by (58) Concordia at Tuesday, 2009 November 24 (~ 01:56 UT)

Trans-Atlantic Event!
Path is crossing SE U.S.A. too. Star at low altitude.

V-Magnitude of target star TYC 1313-01182-1: 9.8 mag
Johnson B-V Colour Index: + 0.7
UCAC instrumental „pseudo-R“ fit-model magnitude: 9.3 mag (data from UCAC3)

DOUBLE STAR!
Name: HEI 114
Magnitude 9.5 and 11.5
WDS shows two measurements:
Year 1982    SEP 1.3 arcsec   PA 328 deg
Year 1997    SEP 1.3 arcsec   PA 337 deg

The max duration is expected to be 10.7 sec with a max drop of 3.4 mag.
The event will take place at an altitude of 53 deg and at azimuth 189 deg. The sun will be at an altitude of -47 deg. (At predicted centre line for longitude E 05 deg)

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 you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_11/1124_58_18178.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091124_18178_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

(58) Concordia, 2009 Nov 24, Station Map

Freitag, November 20th, 2009

Station Map for the Occultation by (582) Olympia at Monday, 2009 November 23 (~ 17:40 UT)

V-Magnitude of target star TYC 5767-01567-1: 11.1 mag
Johnson B-V Colour Index: + 0.5
UCAC instrumental „pseudo-R“ fit-model magnitude: 11.0 mag (data from UCAC3)

The max duration is expected to be 1.9 sec with a max drop of 3.9 mag.
The event will take place at an altitude of 25 deg and at azimuth 211 deg. The sun will be at an altitude of -21 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 1.05 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_11/1123_582_22732.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091123_22732_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

(582) Olympia, 2009 Nov 23, Station Map

Freitag, November 20th, 2009

Station Map for the Occultation by (328) Gudrun at Saturday, 2009 November 21 (~ 17:41 UT)

Magnitude of target star 2UCAC 23520344: 12.6 mag
UCAC instrumental „pseudo-R“ fit-model magnitude: 12.7 mag (data from UCAC3)

The max duration is expected to be 5.4 sec with a max drop of 2.2 mag.
The event will take place at an altitude of  20 deg and at azimuth 205 deg. The sun will be at an altitude of -26 deg. (At predicted centre line for latitude N 45 deg)

There is a 1 sigma uncertainty interval of  ± 0.82 path widths.
The probabilities to see a positive event:

Centre line: ~  46 %
Path limits: ~  39 %
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_11/1121_328_22729.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091121_22729_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

(328) Gudrun, 2009 Nov 21, Station Map

Mittwoch, November 18th, 2009

Station Map for the Occultation by (234) Barbara at Saturday, 2009 November 21 (~ 03:17 UT)

VERY SPECIAL OCCULTATION!
(234) Barbara has a complex concave shape, best modeled as two bodies that may be in contact!
Observations outside the predicted path needed!

TRANS-ATLANTIC EVENT!
Shadow crosses  Florida,U.S.A. too.
Observations planned at the U.S.
See Scotty Degenhardt’s (IOTA Event Coordinator U.S.A.) Call for Observers:
http://scottysmightymini.com/PR/234_Barbara_CallForObservers.htm
with a list of announced stations.

V-Magnitude of target star HIP 34106: 7.5 mag
Spectral type G5
Johnson B-V Colour Index: +1.0
UCAC instrumental „pseudo-R“ fit-model magnitude: 7.2 mag (data from UCAC3)

The max duration is expected to be 8.2 sec with a max drop of 5.6 mag.
The event will take place at an altitude of  41 deg and at azimuth 192 deg. The sun will be at an altitude of -35 deg. (At predicted centre line for longitude E 05 deg)

There is a 1 sigma uncertainty interval of  ± 0.46 path widths.
The probabilities to see a positive event:

Centre line: ~ 72 %
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 you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_11/1121_234_18170.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20091121_18170_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

(234) Barbara, 2009 Nov 21, Station Map