Archive for Oktober, 2008

Donnerstag, Oktober 30th, 2008

Station Map for the Occultation by (2249) Yamamoto at Monday, 2008 November 03  (~ 04:33 UT)

V-Magnitude of target star TYC 1380-00999-1: 10.9 mag
Johnson B-V Colour Index: + 0.9
The UCAC2 gives a „pseudo-R magnitude“ of 10.6 mag

The max duration is expected to be 5.4 sec with a max drop of 6.1 mag.
The event will take place at an altitude of  66 deg and at azimuth 144 deg. The sun will be at an altitude of -27 deg. (At predicted centre line for longitude W 05 deg)

There is a 1 sigma uncertainty interval of  ±  2.02 path widths.
The probabilities to see a positive event:

Centre line: ~ 20 %
Path limits: ~  19 %
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/2008_11/1103_2249_19537.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081103_19537_Sites.txt

Coordinates and maps at the webpage of  E.A.O.N
(NOT updated with Steve Preston’s data):
http://astrosurf.com/eaon/Occultations%20November.htm

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Map Europe for Occultation (2249) Yamamoto

Donnerstag, Oktober 30th, 2008

Station Map for the Occultation by (1672) Gezelle at Monday, 2008 November 03  (~ 04:24 UT)

TRANS-ATLANTIC EVENT!
Path is crossing Canada, the U.S.A. and Mexico too.
Please coordinate stations with OccultWatcher !

PATH SHIFT – UPDATE AT NOV 01 !

Steve has calculated a new update for us! The predicted path has shifted ~ 10 km to the North (perpendicular to the path)  compared to the prediction from Oct 1, which was used for the map below.

V-Magnitude of target star TYC 1225-01472-1: 10.7 mag
Johnson B-V Colour Index: + 0.8
The UCAC2 gives a „pseudo-R magnitude“ of 10.7 mag

The max duration is expected to be 4.1 sec with a max drop of 3.4 mag.
The event will take place at an altitude of  23 deg and at azimuth 269 deg. The sun will be at an altitude of -18 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ±  1.70 path widths.
The probabilities to see a positive event:

Centre line: ~ 23 %
Path limits: ~  22 %
1 sigma lines:  ~ 10 %
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.

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2008_11/1103_1672_19536.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081103_19536_Sites.txt

Coordinates and maps at the webpage of  E.A.O.N
(NOT updated with Steve Preston’s data):
http://astrosurf.com/eaon/Occultations%20November.htm

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Map Europe for Occultation (1672) Gezelle