Observation by Alex Pratt: (676) Melitta occults UCAC4 416-092139

Uploaded by

Alex Pratt

Observer

Alex Pratt

Observed

2023 Jun 09 - 23:58

Uploaded

2023 Jun 17 - 10:13

Objects

676 Melitta
Lightcurve

Equipment

C11 f/10 and f/3.3 focal reducer
QHY174M-GPS camera
SharpCap (recording)
Tangra, AOTA and PyOTE (reduction)

Exposure

0.350 s

Location

Leeds, West Yorkshire (Bortle 7)

Target name

(676) Melitta occults UCAC4 416-092139

Title

(676) Melitta occults UCAC4 416-092139

About this image

The ~80 km diameter asteroid (676) Melitta, mag 13.8, was predicted to occult a mag 14.3 star in Sct for up to 8.8 s. Their combined merged magnitude was 13.3, so the drop in brightness during occultation would be 0.5 mag.

Analysis of my light curve gave:

D - 23 58 48.31 ± 0.34

R - 23 58 57.97 ± 0.34

Duration - 9.66 s

Mag drop - 0.5

Occultation timings of this event were also obtained by Konrad Guhl (DE) and Wojciech Burzynski (PL). William Stewart (GB) was clouded out. The three chords are displayed across a DAMIT shape model of Melitta (derived from light curve inversion).

In recent weeks, a number of stellar occultations by asteroid (676) Melitta have been recorded by European observers. Collectively, these will be used to refine its dimensions, shape profile and solar system orbit.

Files associated with this observation

(676) Melitta_20230609_235853 Z92 ARP.png (112.8 kB)

Like this image

Jeremy Shears, Dr Paul Leyland, Andy Wilson, Grant Privett, Tim Haymes, Mark Kidger

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