Crazy Egeria

Last night I spent on photometry of (13) Egeria asteroid. It is large and irregular object that rotates with period of 7.045 hours, so during winter night it is possible to record more than one rotation. Conditions were not perfect – medium transparency and almost full Moon, however I was able to collect data of reasonable good quality.

I have been collecting data using 130mm refractor and QHY163M camera. Each single exposure was 40 seconds long, and was made with Baader photometric V filter. Unfortunately there are two missing parts of the lightcurve – first was due to my mistake, second one was used for meridian flip. But after lightcurve period normalization first missing part was filled. 

Egeria fly-by stack made of all recorded pictures
Egeria fly-by stack made of all recorded pictures
Egeria lightcurve made on 10/11 January 2017
Egeria lightcurve made on 10/11 January 2017
Egeria lightcurve with normalized period to 7.045h
Egeria lightcurve with normalized period to 7.045h
A three-dimensional model of 13 Egeria that was computed using light curve inversion techniques (source: wikipedia)
A three-dimensional model of 13 Egeria that was computed using light curve inversion techniques (source: wikipedia)

Clear skies!

Leave a Reply

Your email address will not be published. Required fields are marked *