IOTA-ES : Call for Observations

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 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 for the Occultation by (35) Leukothea at Thursday, 2008 October 30  (~ 03:27 UT)

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

V-Magnitude of target star TYC 1772-00826-1: 11.2 mag
Johnson B-V Colour Index: + 0.9
The UCAC2 gives a “pseudo-R magnitude” of 10.9 mag

The max duration is expected to be 6.5 sec with a max drop of 2.7 mag.
The event will take place at an altitude of  37 deg and at azimuth 258 deg. The sun will be at an altitude of -24 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ±  0.41 path widths.
The probabilities to see a positive event:

Centre line: ~ 78 %
Path limits: ~  49 %
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.

More information (coordinates, finder charts) at Steve Preston’s prediction:
http://asteroidoccultation.com/2008_10/1030_35_13253.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081030_13253_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

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

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