2018 stellar Occultations by TNOs, Centaurs and Trojans:


This page will migrate to:


Here you find predictions to selected stellar occultations by TNOs/Centaurs, that are under campaign. We will do our best to update the prediction maps, so be alert for changes in this page (last update on 17/April/2018). If you can observe (or know who can) any of these occultations, please contact us(ribas-at-on.br or bruno.sicardy-at-obspm.fr).

Information about the predictions can be found in Lucky Star project web page and in Assafin et al. 2010 (for Pluto system predictions), Assafin et al. 2012 (for the TNO predictions) and Camargo et al. 2014 (for TNO and Centaur predictions). Please, do references about the predictions to Assafin et al. 2010 and 2012 or Camargo et al 2014 papers. Moste predictions here are done with our own ephemeris, this is indicated on the top of the maps as NIMA ephem. NIMA-ephemeris is calculated by Josselin Desmars and provided by a numerical integration of the motion of the asteroid and by a fit to asteroid's observations Desmars et al. 2015. The observations come from Minor Planet Center and our own observations made at ESO, Pic du Midi, Calar Alto, Sierra Nevada and Observatorio do Pico dos Dias.

Visit Bruno Sicardy's bibliogaphy web page too see some of our publications.
Visit http://occresults.ga/  for all the results on TNO and Centaur occultations obtained so far.

We just entered on a new era for the stellar occultations! With the Gaia DR1 catalogue, the prediction errors are much smaller due to a accuracy of the star position and due to re-reduction of the objects observations with the referred catalogue associated with new orbit determinations.

Informations about the maps (please read at least once!):
- The straight 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 arrow shows the direction of the shadow motion.
- The star R* and K* are the R and K magnitudes, normalized to a body moving at 20km/s.

- 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.


January  February  March  April  May  June  July  August  September  October   November  December

Date Object Star R magnitude Map Other information
Bienor 14.8 2018-04-02_19h47m59s_Bienor_GAIADR1pmUCAC5_NIMAv11.png  

16.5 2018-04-05-15.938_DR1UC5_NIMAdec17_Quaoar.jpg
14 2018-04-07-21h10m35s_Ixion_GDR1_NIMAv4.jpg
2002 MS4
15.3 2018-04-13-17.491_DR1_UC5_NIMAsep17_2002MS4.jpg
14.2 2018-04-14-06h36m28s_Huya_GDR1_NIMA.jpg
2002 MS4
2018-04-28-16.487_DR1_UC5_NIMAsep17_2002MS4.jpg click for more information

Date Object Star R magnitude Map Other information
Ixion 13.4 2018-05-06-19h36m55s_Ixion_GDR1_NIMAv4.jpg  

9.5 2018-05-08T23h48m27s_NIMA_Astyanax.jpg Jupiter Trojan

Bright star!
2002 KX14
14.6 2018-05-10-17h57m50s_2002KX14_GDR1_NIMA.jpg

more events soon...

Web page created and maintained by
 Felipe Braga Ribas