2018 stellar Occultations by TNOs, Centaurs and Trojans:

Campaigns

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 11/May/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. Most 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 Gaia DR2 catalogue, the prediction errors are much smaller due to a accuracy of the star position and to re-reduction of the objects observations with the referred catalogue associated and new orbit calculation.

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.


2018

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

Date Object Star R magnitude Map Other information
06/05
Ixion 13.4 2018-05-06_Ixion/2018-05-06-19.617_DR2_NIMAaug17_Ixion.jpg Updated map:
2018-05-06_Ixion/2018-05-06_19h37m01s_DR2_Ixion.png
07/05
 Elara
G = 13.0 2018-05-06-19h36m55s_Ixion_GDR1_NIMAv4.jpg Jupiter Satellite
08/05
 Astyanax
9.5 2018-05-08T23h48m27s_NIMA_Astyanax.jpg Jupiter Trojan

Bright star!

More informatin, click here

10/05
2002 KX14
14.6 2018-05-10-17h57m50s_2002KX14_GDR1_NIMA.jpg Updated map
2018-05-10_2002KX14/2018-05-10_17h55m40s_DR2_2002KX14.png
Click for more information
12/05
Himalia
15.2 2018-05-12_DR2_Himalia.png Jupiter Irregular Satellite
14/05
2002 KX14
16.8 2018-05-14-02h48m29s_2002KX14_GDR1_NIMA.jpg 2018-05-14_02h46m20s_GAIADR2pmGAIADR2_NIMAv5_2002KX14.png
http://lesia.obspm.fr/lucky-star/predictions/single.php?p=7755
18/05
Pholus
14.0 2018-05-18T14_09_05_GaiaDR2_Pholus.png not NIMA ephem.
 20/05
Himalia
 10.3
2018-05-20_DR2_Himalia.png
Jupiter Irregular Satellite
26/05
Phoebe
16.0
2018-05-26_DR2_Phoebe.png
Saturn Irregular Satellite
26/05
2002 MS4
14.6
2018-05-26-16.621_DR1_UC5_NIMAsep17_2002MS4.jpg
Updated map
2018-05-26_2002MS4/2018-05-26_16h37m07s_2002MS4_GAIADR2pmGAIADR2_NIMAv3.png
Click for more information
27/05
Phoebe
13.7
2018-05-27_DR2_Phoebe.png
28/05
Amycus
10.8
2018-05-28-03.855_DR1_NIMAvSep17_Amycus.jpg Bright star
31/05
Phoebe
14.2
2018-05-31_DR2_Phoebe.png


Web page created and maintained by
 Felipe Braga Ribas