Author Archives: Wolfgang

Station Maps for the Occultation by (4186) Tamashima at
Monday, 2008 October 27 (~ 22:09 UT)

NORTH and SOUTH

V-Magnitude of target star TYC 5331-01004-1: 9.8 mag
Johnson B-V Colour Index: + 0.6
The UCAC2 gives a „pseudo-R magnitude“ of 9.6 mag

The max duration is expected to be 3.1 sec with a max drop of 6.6 mag.
The event will take place at an altitude of 13 deg and at azimuth 119 deg. The sun will be at an altitude of -55 deg. (At predicted centre line for latitude N 47 deg)

There is a 1 sigma uncertainty interval of ± 5.99 path widths.
The probabilities to see a positive event:

Centre line: ~ 7 %
Path limits: ~ 7 %
1 sigma lines: ~ 4 %

(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_10/1027_4186_14860.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081027_14860_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%20October.htm

Good luck with your observation,

Oliver Klös

IOTA-ES

tamashimanorth.gif

tamashimasouth.gif

Station Map for the Occultation by (914) Palisana at
Wednesday, 2008 October 29 (~ 21:50 UT)

V-Magnitude of target star TYC 2820-01384-1: 11.4 mag
Johnson B-V Colour Index: -0.2
The UCAC2 gives a „pseudo-R magnitude“ of 11.6 mag

The max duration is expected to be 5.9 sec with a max drop of 1.2 mag.
The event will take place at an altitude of 79 deg and at azimuth 167 deg. The sun will be at an altitude of -53 deg. (At predicted centre line for longitude E 20 deg)

There is a 1 sigma uncertainty interval of ± 0.34 path widths.
The probabilities to see a positive event:

Centre line: ~ 86 %
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/2008_10/1029_914_13251.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081029_13251_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%20October.htm

Good luck with your observation,

Oliver Klös

IOTA-ES

palisanamap.gif