Selected 2011 stellar Occultations by TNOs
We present
here the
selected
stellar occultations by TNOs from Bruno Sicardy's web page, where
all the predicted events can be found. These
events
are
those that we may do some effort to observe, and update the
prediction maps if
new astrometrical measurements are available. The list is not
complete and can be extended, so please write me if you have
any suggestion, and
be alert for changes in this page (last
modification on 02/December/2011).
More information about the predictions can be found in Assafin et al. 2010.
If you have intention to observe any of this occultations, please contact us (felipe.ribas-at-obspm.fr). Also please, do references about the predictions to Sicardy's web page and/or Assafin et al. 2010 paper.
Attention, even if the maps are public available in Bruno's web site, this list is part of our organizations for campaigns and telescope time proposals, so it should not be broadly distributed.
- For Pluto and Charon, the error is about 800km, and for the other TNOs it can be as big as 3000km.
- The star R* and K* are the R and K magnitudes, normalized to a body moving at 20km/s.
- The body offset is at the upper left corner.
- Be careful, the dates are from the moment of the event in Universal Time, the night of the event may begin at the date before.
If you have intention to observe any of this occultations, please contact us (felipe.ribas-at-obspm.fr). Also please, do references about the predictions to Sicardy's web page and/or Assafin et al. 2010 paper.
Attention, even if the maps are public available in Bruno's web site, this list is part of our organizations for campaigns and telescope time proposals, so it should not be broadly distributed.
Informations
about the maps:
- The strait and continue lines are the shadow limits considering the estimated radius;
- Each red
dot is spaced by one
minute, the nominal occultation time is to the big red dot (that is the
geocentric closest approach);- The strait and continue lines are the shadow limits considering the estimated radius;
- For Pluto and Charon, the error is about 800km, and for the other TNOs it can be as big as 3000km.
- The star R* and K* are the R and K magnitudes, normalized to a body moving at 20km/s.
- The body offset is at the upper left corner.
- Be careful, the dates are from the moment of the event in Universal Time, the night of the event may begin at the date before.
April
May
June
July
August
September
Web page created and maintained by:
Felipe Braga Ribas
| Date | Object | Star R* magnitude | Map | Other informations |
| 23/04 | Makemake | 18.4 |  |
Very difficult but very important! Magnitude R drop 0.24, Maximum duration 68s. Click here for more informations! |
|---|
May
| Date | Object | Star R* magnitude | Map | Other informations |
| 04/05 | Quaoar | 15.7 |  |
Bright star, good placement! Click here for more informations! |
| 04/05 | 2002 MS4 | 16.9 |  |
Event informed by José Luis Ortiz |
| 14/05 | Quaoar | 17.3 |  |
click here for more informations. |
| 21/05 | Chariklo | 11.3 |  |
Event
informed by François Colas. Very bright star! 78% Moon, ~57° apart. click |
| 25/05 | Huya | 16.3 |  |
Event informed by José Luis Ortiz |
| 27/05 | Nix | 15.5 |  |
CLICK FOR INFORMATIONS AND MAPS |
June
| Date | Object | Star R* magnitude | Map | Other informations |
| 03/06 | Pluto | 15.3 |  |
K*mag 11.4 CLICK FOR INFORMATIONS AND MAPS |
| 03/06 | Ixion | 17.1 |  |
Good placement! CLICK FOR INFORMATIONS AND MAPS |
| 04/06 | Charon | 16.6 |  |
Double with Pluto (see next). Same sites! Click for more informations |
| 04/06 | Pluto | 16.6 |  |
Click for more information Double with Charon (see previous). |
| 07/06 | Pluto | 15.4 |  |
K*mag
12.7 double with Charon CLICK FOR INFORMATIONS AND MAPS |
| 07/06 | Charon | 15.4 |  |
EUROPE! Double with Pluto |
| 16/06 | Quaoar |
16.2 |  |
Full Moon ~10°
apart!! Click to see the astrometric updates. |
| 17/06 | Ixion | 17.7 |  |
Full Moon ~30° apart. |
| 19/06 | Ixion | 17.4 |
 |
85% Moon ~55° apart. CLICK FOR INFORMATIONS AND MAPS |
| 21/06 | Ixion | 18.9 |  |
New map with new offset and star position. |
| 23/06 | Charon | 14.6 |  |
Double with Pluto (see next). Same sites! CLICK FOR INFORMATIONS AND MAPS |
| 23/06 | Pluto | 14.6 |  |
CLICK FOR INFORMATIONS AND MAPS Bright Star! Double with Charon (see previous) |
| 27/06 | Ixion | 18.1 RA= 17 01 20.3128 DEC= -25 00 04.454 |
 |
New map with new offset and star position. |
| 27/06 | Pluto | 14.1 |  |
Double with Hydra! (see next) **CLICK TO SEE IMPORTANT UPDATES** CLICK HERE FOR INFORMATIONS AND MAPS UPDATES |
| 27/06 | Hydra | 14.1 |  |
Double with Pluto, see previous. New prediction with an improved orbit determination!! |
July
| Date | Object | Star R* magnitude | map | other informations |
| 12/07 | 2002 TX300 | 16.7 AR 00 52 10.8294 DEC 29 54 09.136 |
 |
CLICK HERE FOR INFORMATIONS AND MAPS UPDATES Not normalized R magnitude 17.1, K magnitude 15.2. |
| 13/07 | Pluto | 17.1 AR 18 23 48.6897 DEC -18 51 44.026 |
 |
K* mag 8.7! 96% moon, ~8° apart New star position:  |
| 18/07 | Charon | 16.0 |  |
K* mag 13.2 89% moon, ~58° apart Double with Pluto (see below) |
| 18/07 | Pluto | 16.0 |  |
K* mag 13.2 Double with Charon. New star position:  |
| 21/07 | Ixion | 17.9 |  |
August
| Date | Object | Star R* magnitude | map | other informations |
| 05/08 | Quaoar | 17.6 AR 17 22 16.5142 DEC -15 22 52.644 |
 |
CLICK HERE FOR INFORMATIONS AND MAPS UPDATES |
| 16/08 | 2003 OP32 | 16.0 |  |
CLICK HERE FOR INFORMATIONS AND MAPS UPDATES Latest map:  |
| 21/08 | Ixion | 17.6 |  |
Map with new offset: |
September
| Date | Object | Star R* magnitude | map | other informations |
| 05/09 | 2004 NT33 | 15.5 |  |
New star position and offset applied: |
| Date | Object | Star R* magnitude | map | other informations |
| 07/12 | Haumea and Hi'iaka |
17.5 |  |
**Under campaign** CLICK HERE FOR INFORMATIONS AND MAPS UPDATES  |
Web page created and maintained by:
Felipe Braga Ribas