Graze logo

OCCULTATION OF UCAC4 519 008241 BY 429 Lotis
2016 March 1

A 2.7 second occultation was recorded by Dave Gault from the Blue Mountain. In addition, there would appear to be a single video frame 'blink event' some 3.7 seconds after the reappearance. No other observations were reported.

View a prediction here.

  1    D Gault,Hawkesbury Heights, NSW, AU  
  2(P) Prediction               


Lotis occultation__ 2016 March 1


The circle above is plotted at the expected 72 km diameter of (429) Lotis. With only one chord it is not possible to determine whether Dave was north or south of the central line of the event. The circle has been plotted on the observed chord. As can be seen from the outline above, it is difficult to reconcile the 'blink' event with a limb grazing occultation on (429) Lotis - the time difference between the end of the main occultation and the blink is close to the maximum possible occultation duration and would require (429) Lotis to be very elongated or much larger than expected. The alternative explanations are that the event is spurious artifact of seeing or that (429) Lotis is a binary object or has a satellite.

The figure below shows the Tangra light curve of the occultation.

Lotis  occultation__ 2016 March 1

Observational Data:

Observation details for MP ( 429 ) Lotis
By Star              UCAC4 519-008241
On 2016-03-01  at 11:34:36.0


Observer   Dave Gault
Location   Hawkesbury Heights, NSW, AU
Longitude  +150:38
Latitude   -33:39
Altitude   286 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   30 cm
Seeing     Steady Clear 
Camera Type  Flea 3-03S1 with ADVS        ADVS          
Camera Delay 
Timing     GPS - time inserted Video with frame analysis
Disappearance  11:34:34.60
Reappearance   11:34:37.30
Comments: Star was seen to blink for one frame duration at 11:34:41.0 UT Light curve, CSV files included with report.  


Return to 2016 occultation results

[Site Map] [What's an Occultation?]
[Total Occultations] [Grazing Occultations] [Planetary Occultations] [Jovian Satellite Eclipses]
[Timing Occultations] [Reporting Observations] [Coming Events] [Software]
[About Us] [Publications] [Membership] [Links]

[Top of Page][Return to Home Page]