Observation by Alex Pratt: (66803) 1999 TD273 occults UCAC4 549-131...

Uploaded by

Alex Pratt

Observer

Alex Pratt

Observed

2022 Jul 14 - 22:44

Uploaded

2022 Jul 18 - 15:32

Objects

66803 1999 TD273
Lightcurve

Equipment

C11 f/10 and f/3.3 focal reducer
Watec 910HX video camera
IOTA GPS 1PPS video time and date inserter
OccuRec (recording)
Tangra and AOTA (reduction)

Exposure

0.04s (1 video frame)

Location

Z92 - Leeds (Bortle 7)

Target name

(66803) 1999 TD273 occults UCAC4 549-131905

Title

(66803) 1999 TD273 occults UCAC4 549-131905

About this image

The ~7.5 km diameter asteroid (66803) 1999 TD273, mag 17.7, occulted a mag 11 star in Delphinus for 0.14 s. (Maximum predicted duration was 0.45 s for an observer on the centre line).

D - 22 44 57.17 ± 0.02

R - 22 44 57.31 ± 0.02

Duration : 0.14 s

Mid-event : 22 44 57.24 UT

A video clip can be viewed here

(66803) 1999 TD273 occults UCAC4 549-131905

Such a small asteroid makes it difficult to obtain multiple chords across the object. This single chord should give high-precision astrometry for the instant of occultation.

Files associated with this observation

66803_20220714_224457_AOTA_ARP.jpg (301.6 kB)

Like this image

Tim Haymes, David Basey, Jeremy Shears, Graham Winstanley

Comments

Tim Haymes, 2022 Jul 18 - 15:45 UTC

Nice catch Alex. This looks like the shortest duration asteroid event recorded from the UK. I checked back to 2015

Alex Pratt, 2022 Jul 18 - 15:57 UTC

Hi Tim,

I'm sure our team will obtain some successful events briefer than 0.1 s; just need to be fortunate with a bright target star to allow us to use fast frame rates to confirm the occultation.

Alex.

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of work by third parties is expressly forbidden without the consent of the copyright holder. By submitting images to this online gallery, you grant the BAA permission to reproduce them in any of our publications.

Registered charity no. 210769
Registered company no. 117572

For more information including contact details, click here.

Our Terms of Use are here.

Our Privacy Policy is here.