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Occultation of (83) Beatrix and star TYC 1945-00656-1, 19 February 2020

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Derek Robson's picture
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Joined: 04/12/2017 - 02:41
Occultation of (83) Beatrix and star TYC 1945-00656-1, 19 February 2020

On the morning of 19 February 2020, the 91 kilometre diameter asteroid (83) Beatrix (12th magnitude) occulted the 11.4 magnitude star TYC 1945-00656-1 at 01:38:58 UT viewed from Loughborough, UK.

I followed the occultation from about two minutes before occultation to over 2 hours after. Images were taken with a Tamron 70-300 mm lens with a Canon 1100D, fixed to a Sky Watcher Star Adventurer. Over 300 x 25 second images (ISO 3200) were collected in sequence with only a second or two gap between each exposure. They were filtered down to 216 images by viewing all images and manually rejecting those badly affected by wind.

Here are a few cropped images of the asteroid-star pairing, and separating away from the star. Raw grey scale crops. Times (hrs UTC): (15s, ISO 6400), 01:36 and (25s, ISO 3200): 02:29, 02:55 and 03:49, 19/2/2020.  The composite stack (in colour) shows the faint asteroid 2hr 13 min trail attached to the star TYC 1945-00656-1.

Tim Haymes's picture
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Joined: 13/06/2014 - 21:53
Great sequence

There were some other observers in England. I was just south of the path in Oxfordshire and Phil Denyer in N London who was on a close chord to myself. We observed no event by video.   Simon Kidd north of Stevenage recorded a long positive of 8 sec as did a nearby colleague of his with 9 sec. (durations are preliminary)

Loughborough was expected to be in the shadow path, so it was a close appulse.

Tim

Derek Robson's picture
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Joined: 04/12/2017 - 02:41
Great sequence

Thanks Tim. Very interesting.