Archive for August, 2009

Sonntag, August 23rd, 2009

Station Map for the Occultation by (71) Niobe at Monday, 2009 August 24 (~ 00:02 UT)

V-Magnitude of target star TYC 2934-00106-1: 9.4 mag
Johnson B-V Colour Index: + 1.1
The UCAC2 gives a „pseudo-R magnitude“ of  9.2  mag

The max duration is expected to be 2.8 sec with a max drop of  3.8 mag.
The event will take place at an altitude of 27 deg and at azimuth 56 deg. The sun will be at an altitude of -23 deg. (At predicted centre line for longitude E 20 deg 32 min)

There is a 1 sigma uncertainty interval of  ± 0.53 path widths.
The probabilities to see a positive event:

Centre line: ~  65 %
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_08/0824_71_18524.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090824_18524_Sites.txt

Map and Coordinates at the web page of  E.A.O.N. (not updated with Steve Preston’s prediction):
http://astrosurf.com/eaon/Occultations%20August.htm

Good luck with your observation!

Oliver Klös

IOTA-ES

(71) Niobe, 2009 Aug 24

Dienstag, August 18th, 2009

Station Map for the Occultation by (389) Industria at Friday, 2009 August 21 (~ 19:54 UT)

Magnitude of target star 2UCAC 26347135: 13.0 mag

Please notice:
The combined light of the asteroid and the star will drop by 0.4 mag to 12.0 mag (the magnitude of the asteroid) during an occultation.

The max duration is expected to be 10.2 sec with a max drop of  0.36 mag.
The event will take place at an altitude of 23 deg and at azimuth 164 deg. The sun will be at an altitude of -15 deg. (At predicted centre line for longitude E 15 deg)

There is a 1 sigma uncertainty interval of  ± 1.21 path widths.
The probabilities to see a positive event:

Centre line: ~  32 %
Path limits: ~  30 %
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_08/0821_389_21783.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090821_21783_Sites.txt

Good luck with your observation!

Oliver Klös

IOTA-ES

(389) Industria, 2009 Aug 21

Montag, August 17th, 2009

Station Maps for the Occultation by (1023) Thomana at Thursday, 2009 August 20 (~ 00:10 UT)

WEST and EAST

Magnitude of target star 2UCAC 31962847: 12.8 mag

The max duration is expected to be 5.0 sec with a max drop of  1.5 mag.
The event will take place at an altitude of 44 deg and at azimuth 190 deg. The sun will be at an altitude of -31 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 0.81 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_08/0820_1023_21779.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090820_21779_Sites.txt

Map and Coordinates at the web page of  E.A.O.N. (not updated with Steve Preston’s prediction):
http://astrosurf.com/eaon/Occultations%20August.htm

Good luck with your observation!

Oliver Klös

IOTA-ES

(1023) Thomana, 2009 Aug 20(1023) Thomana, 2009 Aug 20, Station Map EAST

Montag, August 17th, 2009

Station Maps for the Occultation by (788) Hohensteina at Tuesday, 2009 August 18 (~ 01:30 UT)

WEST and EAST

Magnitude of target star 2UCAC 30929281: 12.5 mag

The max duration is expected to be 7.7 sec with a max drop of  0.9 mag.
The event will take place at an altitude of 31 deg and at azimuth 229 deg. The sun will be at an altitude of -26 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ± 0.59 path widths.
The probabilities to see a positive event:

Centre line: ~  61 %
Path limits: ~  46 %
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_08/0818_788_21773.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090818_21773_Sites.txt

Map and Coordinates at the web page of  E.A.O.N. (not updated with Steve Preston’s prediction):
http://astrosurf.com/eaon/Occultations%20August.htm

Good luck with your observation!

Oliver Klös

IOTA-ES

(788) Hohensteina, 2009 Aug 18, Station Map WEST(788) Hohensteina, 2009 Aug 18, Station Map EAST

Dienstag, August 11th, 2009

Station Map for the Occultation by (480) Hansa at Saturday, 2009 August 15 (~ 00:22 UT)

V-Magnitude of target star TYC 1062-02240-1: 11.8 mag
Johnson B-V Colour Index: -0.1
The UCAC2 gives a „pseudo-R magnitude“ of  11.3  mag

The max duration is expected to be 5.6 sec with a max drop of  1.3 mag.
The event will take place at an altitude of 44 deg and at azimuth 235 deg. The sun will be at an altitude of -31 deg. (At predicted centre line for longitude E 05 deg)

There is a 1 sigma uncertainty interval of  ± 0.55 path widths.
The probabilities to see a positive event:

Centre line: ~  64 %
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_08/0815_480_17830.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090815_17830_Sites.txt

Map and Coordinates at the web page of  E.A.O.N. (not updated with Steve Preston’s prediction):
http://astrosurf.com/eaon/Occultations%20August.htm

Good luck with your observation!

Oliver Klös

IOTA-ES

(480) Hansa, 2009 Aug 15

Dienstag, August 11th, 2009

Station Map for the Occultation by (995) Sternberga at Wednesday, 2009 August 12 (~ 03:16 UT)

V-Magnitude of target star TYC 1318-00455-1: 9.0 mag
Spectral type F8
Johnson B-V Colour Index: + 0.6
The UCAC2 gives a „pseudo-R magnitude“ of  9.0  mag

The max duration is expected to be 0.9 sec with a max drop of  6.7 mag.
The event will take place at an altitude of 16 deg and at azimuth 81 deg. The sun will be at an altitude of -18 deg. (At predicted centre line for longitude 0 deg)

There is a 1 sigma uncertainty interval of  ± 1.96 path widths.
The probabilities to see a positive event:

Centre line: ~  20 %
Path limits: ~  20 %
1 sigma lines:  ~ 9 %
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_08/0812_995_18715.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20090812_18715_Sites.txt

Good luck with your observation!

Oliver Klös

IOTA-ES

(995) Sternberga, 2009 Aug 12