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 15/February/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.

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.


2018

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


January
Date Object Star R magnitude Map Other information
03/01/
2018
2002 VE95
15.6 2018-01-03-20.980_NIMAmay17_2002VE95.jpg  

23/01/
2018
 Chaos
15.8 2018-01-23-04.922_DR1_UC5pm_NIMA_Chaos.jpg
28/01/
2018
2002 TC302
15.4 2018-01-28-21h42m30s_2002TC302_GDR1_NIMA.jpg Using UCAC5 Proper Motion
AND
updated NIMA ephem

2018-01-28-21.911_UC5pm_NIMAjan18_2002TC302.jpg
Several Positives

February
Date Object Star R magnitude Map Other information
02/02
Chaos 14.7 2018-02-02-23.780_DR1_UC5pm_NIMA_Chaos.jpg  

03/02
 Thereus
12.1 2018-02-03T07h29m09s_Thereus.jpg Jupiter's Trojan asteroid
04/02
Ennomos
13.0 2018-02-04 4709 Ennomos.jpg Jupiter's Trojan asteroid

2 Positives
20/02
2010 EK139
14.7 2018-02-20_04h51m11s_GAIADR1pmUCAC5_NIMAv2_2010EK139.png Updated ephemeris on 15/Feb
(note the error bars in red)

2018-02-20_04h50m42s_GAIADR1pmUCAC5_NIMAv15feb_2010EK139.png
Click here for more info.
28/02
Haumea
18.1
2018-02-28-22h55m52s_Haumea_GDR1_NIMAv4.jpg

Web page created and maintained by
 Felipe Braga Ribas