A 1.5 second occultation Deimos, one of Mars' small moons, was recorded by Bill Hanna, using ADVS Video technique.

No clearly observed misses were recorded for this event.

View the Personal Occult prediction.

Observers:
  1    W Hanna,Alice Springs, Australia     
  2(P) Prediction, Personal 19 June         


        

Discussion:

The circle above is plotted at the expected 12 km diameter of Deimos. With only one chord it is not possible to determine whether Bill was north or south of the central line of the event. However, assuming the updated prediction was approximately correct the chord would suggest that the it lie within a few km of the central portion of Deimos.

This was a difficult event to observe as Deimos stays very close to Mars. The images below show Deimos just before and just after occultation

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

Some of the new Tangra features designed to make Jupiter moon results easier to scan helped in getting this clean result.

By the way - this is the first observed occultation by a Martian satellite. Well done Bill!

Observational Data:

Observation details for MP ( 2 ) Mars
By Star              HIP HIP62565
On 2014-06-17  at 11:47:30.0

_______________________________

Observer   William Hanna
Location   Alice Springs, Australia
Longitude  +133:53
Latitude   -23:42
Altitude   584 m
Datum      WGS84
Telescope SCT including Cass and Mak
Aperture   20 cm
Seeing     Steady Clear
Camera Type  Grasshopper Express with ADVS              ADVS
Camera Delay 0
Timing     GPS - time inserted Video with frame analysis
Disappearance  11:47:37.78
Reappearance   11:47:39.29
Comments: gamma 1.0, gain 18dB