Occultation by Lorraine

Observed: 2 Dec 2015

Michel Bonnardeau
3 Dec 2015, corrected/updated 22 Dec 2015
corrected 10 Apr 2017 (shadow size)

Abstract

The minor planet 1114 Lorraine was observed occulting a 10.7 mag star. The duration of the occultation was 3.4±0.7s.

Introduction

The occultation of the 10.7 mag star UCAC4-493-006725 by the 14.1 mag asteroid 1114 Lorraine on Dec 2, 2015 was predicted on Steve Preston's Predictions Website. The details of the prediction are here.

Observation

The observation was carried out with a Meade LX200 203mm f/6.3 Schmidt-Cassegrain telescope, a Clear fiter and a SBIG ST7E camera (KAF401E CCD). A few seconds before the occultation, the equatorial motor is shut down and the camera obturator is opened and 60 seconds after the begin of the exposure the obturator is closed.

The resulting image show star trails with an interruption due to the asteroid.

The trace begin is at 22:10:04 ± 0.5 UT
the ingress at 22:10:38.5 ± 0.5 UT
the egress at 22:10: 41.9 ± 0.5 UT
the end at 22:11:04 ± 0.5.
The duration of the occultation is 3.4 ± 0.7 s.

A report was sent to Planoccult. (May not be available on the web).

The Euraster chords are visible here (on line) and here (off line).

Technical notes

Telescope and camera configuration.

Computer and software configuration.