Observation by Tim Haymes: (541) Deborah occults star

Uploaded by

Tim Haymes

Observer

Tim Haymes

Observed

2023 Nov 07 - 05:03

Uploaded

2023 Nov 07 - 18:36

Objects

541 Deborah
Lightcurve

Equipment

QHY174mGPS
C11 F/6

Exposure

5 x 2sec

Location

N. Oxfordshire

Target name

(591) Deborah

Title

(541) Deborah occults star

About this image

This 14.5 magnitude asteroid occulted the 13.1 mag star to the right ( UCAC4 571_007453 ). In this image the exposure to capture the asteroid was 2-sec as it passed roughly mid way between a wide double. The exposure I used for measuring the duration of the occultation was 0.33s in a FITS Sequence.

From the prediction i was near the southern edge. I measured a duration of 1.6s. An observer in the middle of the path would have seen a 4 sec disappearance. Transparency was quite poor owing to a bonfire-smoke laden atmosphere and a longer exposure was needed.

This was a "trans-atlantic" event, with some US observers joining from the West at a more sociably hour.

There are two observation chords for this event from the UK (reported so far), and one near-miss.

Files associated with this observation

(541)_Autosave_5 x2s_overlays.jpg (228.8 kB)

Like this image

Jeremy Shears, Callum Potter

Comments

Tim Haymes, 2023 Nov 08 - 15:42 UTC

The asteroid is part of a project led by Dr. Anna Marciniak - http://iota es.de/neglected_asteroids.html

The Astronomical Observatory Institute of Poznan, Poland, is coordinating a world-wide observing campaign of somewhat neglected asteroids with slow rotation and small light-curve amplitudes.

There are number of projects to study certain asteroids by observing occultations. Details here:

https://cloud.occultwatcher.net/campaigns

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