Archive for September, 2010

Montag, September 6th, 2010

 

Station Map for the Occultation by (326) Tamara at Monday, 2010 September 06 (~ 22:06 UT)

V-Magnitude of target star TYC 2416-00777-1: 9.6 mag
Johnson B-V Colour Index: + 1.5
UCAC instrumental „pseudo-R“ fit-model magnitude: 9.1 mag (data from UCAC3)
The max duration is expected to be 4.1 sec with a max drop of 5.1 mag.
The event will take place at an altitude of  15 deg and at azimuth 49 deg. The sun will be at an altitude of -30 deg. (At predicted centre line for longitude E 12 deg)
There is a 1 sigma uncertainty interval of  ± 0.43 path widths.
The probabilities to see a positive event:

Centre line: ~  75 %
Path limits: ~  49 %
1 sigma lines:  ~ 16 %
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/2010_09/0906_326_25761.htm

Good luck with your observation!

Oliver Klös
IOTA-ES

(326) Tamara, 2010 September 06, Station Map

Freitag, September 3rd, 2010

Station Map for the Occultation by (474) Prudentia at Sunday, 2010 September 05 (~ 01:14 UT)

V-Magnitude of target star HIP 1927: 8.5 mag
Spectral type K5
The max duration is expected to be 5.5 sec with a max drop of 4.4 mag.
The event will take place at an altitude of  37 deg and at azimuth 201 deg. The sun will be at an altitude of -24 deg. (At predicted centre line for longitude E 20 deg)

There is a 1 sigma uncertainty interval of  ± 0.70 path widths.
The probabilities to see a positive event:

Centre line: ~  53 %
Path limits: ~  42 %
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/2010_09/0905_474_21223.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20100905_21223_Sites.txt

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

Good luck with your observation!

Oliver
IOTA-ES

(474) Prudentia, 2010 September 05, Station Map