Archive for April, 2009

Freitag, April 17th, 2009

Station Map for the Occultation by (370) Modestia at Sunday, 2009 April 19 (~ 20:03 UT)

V-Magnitude of target star TYC 5508-01191-1: 10.3 mag
Johnson B-V Colour Index: + 0.6
The UCAC2 gives a „pseudo-R magnitude“ of  10.3 mag

The max duration is expected to be 3.3 sec with a max drop of 4.3 mag.
The event will take place at an altitude of 27 deg and at azimuth 179 deg. The sun will be at an altitude of -17 deg. (At predicted centre line for longitude E 20 deg)

There is a 1 sigma uncertainty interval of  ± 1.41 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_04/0419_370_18601.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090419_18601_Sites.txt

Good luck with your observation!

Oliver Klös

IOTA-ES

(370) Modestia, 2009 Apr 19, Station Map

Freitag, April 10th, 2009

Station Map for the Occultation by (318) Magdalena at Tuesday, 2009 April 14 (~ 00:51 UT)

V-Magnitude of target star TYC 0833-00754-1: 11.6 mag
Johnson B-V Colour Index: + 1.0
The UCAC2 gives a „pseudo-R magnitude“ of  11.3 mag

The max duration is expected to be 28.2 sec with a max drop of 3.1 mag.
The event will take place at an altitude of 25 deg and at azimuth 255 deg. The sun will be at an altitude of -25 deg. (At predicted centre line for longitude 0 deg)

There is a 1 sigma uncertainty interval of  ± 0.74 path widths.
The probabilities to see a positive event:

Centre line: ~  50 %
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/2009_04/0414_318_17434.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090414_17434_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES

(318) Magdalena, 2009 Apr 14, Station Map

Freitag, April 10th, 2009

Station Map for the Occultation by (169) Zelia at Monday, 2009 April 13 (~ 02:32 UT)

Magnitude of target star 2UCAC 27848332: 11.8 mag

The max duration is expected to be 2.8 sec with a max drop of 1.3 mag.
The event will take place at an altitude of 19 deg and at azimuth 230 deg. The sun will be at an altitude of -23 deg. (At predicted centre line for longitude E 05 deg)

There is a 1 sigma uncertainty interval of  ± 1.00 path widths.
The probabilities to see a positive event:

Centre line: ~  38 %
Path limits: ~  34 %
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_04/0413_169_17431.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090413_17431_Sites.txt

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

Good luck with your observation!

Oliver Klös

IOTA-ES

(169) Zelia, 2009 Apr 13, Station Map