Archive for Juni, 2009

Mittwoch, Juni 17th, 2009

Station Map for the Occultation by (619) Triberga at Thursday, 2009 June 18 (~ 22:35 UT)

V-Magnitude of target star HIP 86320: 9.1 mag
Spectral type F5
Johnson B-V Colour Index: + 0.5
The UCAC2 gives a „pseudo-R magnitude“ of 9.0 mag

The max duration is expected to be 3.1 sec with a max drop of 4.4 mag.
The event will take place at an altitude of 43 deg and at azimuth 164 deg. The sun will be at an altitude of -21 deg. (At predicted centre line for longitude E 07 deg)

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

Centre line: ~  56 %
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 you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_06/0618_619_17636.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090618_17636_Sites.txt

Map and Coordinates at the web page of  E.A.O.N. Not updated with Steve Preston’s data yet (Status 2009.06.17, 08:15 UT):
http://astrosurf.com/eaon/Occultations%20June.htm

Good luck with your observation!

Oliver Klös

IOTA-ES

(619) Triberga, 2009 June 18, Station Map

Dienstag, Juni 9th, 2009

Station Map for the Occultation by (978) Aidamina at Saturday, 2009 June 13 (~ 01:47 UT)

NORTH and SOUTH

V-Magnitude of target star TYC 1181-01105-1: 11.5 mag
Johnson B-V Colour Index: + 0.6
The UCAC2 gives a „pseudo-R magnitude“ of 11.3 mag

The max duration is expected to be 2.9 sec with a max drop of 3.4 mag.
The event will take place at an altitude of 30 deg and at azimuth 93 deg. The sun will be at an altitude of -14 deg. (At predicted centre line for longitude E 06 deg 30 min)

There is a 1 sigma uncertainty interval of  ±  0.60 path widths.
The probabilities to see a positive event:

Centre line: ~  59 %
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_06/0613_978_17610.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090613_17610_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES

(978) Aidamina, 2009 June 13, Station Map NORTH(978) Aidamina, 2009 June 13, Station Map SOUTH

Dienstag, Juni 9th, 2009

Station Map for the Occultation by (481) Emita at Saturday, 2009 June 13 (~ 01:19 UT)

V-Magnitude of target star TYC 5263-00453-1: 11.3 mag
Johnson B-V Colour Index: + 0.4
The UCAC2 gives a „pseudo-R magnitude“ of 11.0 mag

The max duration is expected to be 5.2 sec with a max drop of 2.6 mag.
The event will take place at an altitude of 10 deg and at azimuth 114 deg. The sun will be at an altitude of -18 deg. (At predicted centre line for longitude E 15 deg)

There is a 1 sigma uncertainty interval of  ±  0.42 path widths.
The probabilities to see a positive event:

Centre line: ~  77 %
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_06/0613_481_20384.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090613_20384_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES

(481) Emita, 2009 June 13, Station Map

Dienstag, Juni 9th, 2009

Station Map for the Occultation by (107) Camilla at Friday, 2009 June 12 (~ 23:44 UT)

(107) Camilla has a satellite (~ 9 km at 1235 km)
More data:
http://www.johnstonsarchive.net/astro/astmoons/am-00107.html

Magnitude of target star 2UCAC 28404748: 13.3 mag

Asteroid is brighter than target star!

In the case of an occultation, the combined light of the asteroid and the star will drop by 0.4 mag to 12.5 mag (the magnitude of the asteroid).

The max duration is expected to be 15.7 sec with a max drop of  0.42 mag.
The event will take place at an altitude of 25 deg and at azimuth 179 deg. The sun will be at an altitude of -12 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 0.64 path widths.
The probabilities to see a positive event:

Centre line: ~  57 %
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 you station with OccultWatcher !

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2009_06/0612_107_20383.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090612_20383_Sites.txt

Good luck with your observation!

Oliver Klös

IOTA-ES

(107) Camilla, 2009 June 12, Station Map

Montag, Juni 8th, 2009

Station Map for the Occultation by (409) Aspasia at Friday, 2009 June 12 (~ 20:32 UT)

Magnitude of target star 2UCAC 25773379: 12.4 mag

Asteroid is brighter than target star!
In the case of an occultation, the combined light of the asteroid and the star will drop by 0.3 mag to 11.2 mag (the magnitude of the asteroid).

The max duration is expected to be 31.3 sec with a max drop of 0.31 mag.
The event will take place at an altitude of 29 deg and at azimuth 183 deg. The sun will be at an altitude of -12 deg. (At predicted centre line for latitude N 45 deg)

There is a 1 sigma uncertainty interval of  ± 0.20 path widths.
The probabilities to see a positive event:

Centre line: ~  99 %
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_06/0612_409_20381.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090612_20381_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES

(409) Aspasia, 2009 June 12, Station Map