IOTA-ES : Call for Observations

Station Map for the Occultation by (449) Hamburga at Friday, 2008 November 07  (~ 18:04 UT)

Magnitude of target star 2UCAC 22342806: 12.2 mag

The max duration is expected to be 2.9 sec with a max drop of 3.2 mag.
The event will take place at an altitude of  11 deg and at azimuth 209 deg. The sun will be at an altitude of -18 deg. (At predicted centre line for latitude N 50 deg)

There is a 1 sigma uncertainty interval of  ±  0.67 path widths.
The probabilities to see a positive event:

Centre line: ~ 55 %
Path limits: ~  43 %
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/2008_11/1107_449_19752.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081107_19752_Sites.txt

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Map for the Occultation by (1603) Neva at Friday, 2008 November 07  (~ 17:33 UT)

V-Magnitude of target star TYC 5836-00379-1: 9.3 mag
Johnson B-V Colour Index: + 0.5
Spectral Type: F2
The UCAC2 gives a “pseudo-R magnitude” of 9.3  mag

The max duration is expected to be 16.6 sec with a max drop of 5.8 mag.
The event will take place at an altitude of  20 deg and at azimuth 134 deg. The sun will be at an altitude of -11 deg. (At predicted centre line for latitude N 45 deg)

There is a 1 sigma uncertainty interval of  ±  1.41 path widths.
The probabilities to see a positive event:

Centre line: ~ 28 %
Path limits: ~  26 %
1 sigma lines:  ~ 12 %
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_11/1107_1603_14406.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081107_14406_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 (1596) Itzigsohn at Friday, 2008 November 07  (~ 20:58 UT)

Magnitude of target star 2UCAC 39809218: 11.7 mag

The max duration is expected to be 7.3 sec with a max drop of 2.8 mag.
The event will take place at an altitude of  29 deg and at azimuth 88 deg. The sun will be at an altitude of -49 deg. (At predicted centre line for latitude N 50 deg)

There is a 1 sigma uncertainty interval of  ±  0.91 path widths.
The probabilities to see a positive event:

Centre line: ~ 42 %
Path limits: ~  37 %
1 sigma lines:  ~ 14 %
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_11/1107_1596_13273.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081107_13273_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 Maps for the Occultation by (447) Valetine at Thursday, 2008 November 06  (~ 04:40 UT)

NORTH and SOUTH

TWO occultations by (447) Valentine in one night!
This is the second event.
The other event will be ~ 3.5 hours earlier and will be across Spain and Portugal.

Magnitude of target star 2UCAC 40155990:  12.6 mag

The max duration is expected to be 19.6 sec with a max drop of 1.5 mag.
The event will take place at an altitude of  54 deg and at azimuth 243 deg. The sun will be at an altitude of -15 deg. (At predicted centre line for longitude E 10 deg)

There is a 1 sigma uncertainty interval of  ±  0.51 path widths.
The probabilities to see a positive event:

Centre line: ~ 68 %
Path limits: ~  48 %
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_11/1106_447_19543.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081106_19543_Sites.txt

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Map for the Occultation by (4460) Bihoro at Thursday, 2008 November 06  (~ 02:26 UT)

V-Magnitude of target star TYC 3774-00057-1: 11.4 mag
Johnson B-V Colour Index: + 1.2

The max duration is expected to be 5.7 sec with a max drop of 4.4 mag.
The event will take place at an altitude of  67 deg and at azimuth 36 deg. The sun will be at an altitude of -50 deg. (At predicted centre line for longitude W 05 deg)

There is a 1 sigma uncertainty interval of  ±  2.30 path widths.
The probabilities to see a positive event:

Centre line: ~ 7 %
Path limits: ~  7 %
1 sigma lines:  ~ 4 %
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_11/1106_4460_19542.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081106_19542_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 (1755) Lorbach at Thursday, 2008 November 06  (~ 01:16 UT)

V-Magnitude of target star TYC 0252-00306-1: 9.5 mag
Johnson B-V Colour Index: + 0.1
Spectral Type G0
The UCAC2 gives a “pseudo-R magnitude” of  9.6 mag

The max duration is expected to be 1.0 sec with a max drop of 7.1 mag.
The event will take place at an altitude of  11 deg and at azimuth 93 deg. The sun will be at an altitude of -47 deg. (At predicted centre line for longitude E 11 deg)

There is a 1 sigma uncertainty interval of  ±  2.30 path widths.
The probabilities to see a positive event:

Centre line: ~ 17 %
Path limits: ~  17 %
1 sigma lines:  ~ 8 %
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_11/1106_1755_14469.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081106_14469_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 (447) Valetine at Thursday, 2008 November 06  (~ 01:14 UT)

TWO occultations by (447) Valentine in one night!
This is the first event.
The other event will be ~ 3.5 hours later and will be across Italy, France, Austria, Switzerland, Germany, Belgium and U.K.

Magnitude of target star 2UCAC 40156004:  12.7 mag

The max duration is expected to be 19.9 sec with a max drop of 1.4 mag.
The event will take place at an altitude of  60 deg and at azimuth 108 deg. The sun will be at an altitude of -63 deg. (At predicted centre line for longitude W 04 deg)

There is a 1 sigma uncertainty interval of  ±  0.47 path widths.
The probabilities to see a positive event:

Centre line: ~ 78 %
Path limits: ~  48 %
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_11/1106_447_19541.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081106_19541_Sites.txt

Good luck with your observation,

Oliver Klös

IOTA-ES

Station Map for the Occultation by (453) Tea at Wednesday, 2008 November 05  (~ 00:31 UT)

V-Magnitude of target star TYC 1784-00200-1: 10.1 mag
Johnson B-V Colour Index: + 1.3
The UCAC2 gives a “pseudo-R magnitude” of 9.7 mag

The max duration is expected to be 1.8 sec with a max drop of 3.6 mag.
The event will take place at an altitude of  72 deg and at azimuth 193 deg. The sun will be at an altitude of -62 deg. (At predicted centre line for longitude 0 deg)

There is a 1 sigma uncertainty interval of  ±  1.26 path widths.
The probabilities to see a positive event:

Centre line: ~ 31 %
Path limits: ~  29 %
1 sigma lines:  ~ 12 %
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_11/1105_453_13887.htm

Table of potential observing stations and cities with distance from center of predicted path (Derek C. Breit):
http://www.poyntsource.com/New/Google/20081105_13887_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