Observation by Alex Pratt: Video astrometry of PHA (7482) 1994 PC1 ...

Uploaded by

Alex Pratt

Observer

Alex Pratt

Observed

2022 Jan 19 - 18:11

Uploaded

2022 Jan 20 - 12:21

Objects

7482 1994 PC1

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 (reduction)

Exposure

0.08s (2 video frames)

Location

Z92 (Bortle 7)

Target name

PHA (7482) 1994 PC1

Title

Video astrometry of PHA (7482) 1994 PC1 - 2022 Jan 19

About this image

The evening of Jan 19 was my first opportunity to monitor this Potentially Hazardous Asteroid. Shortly after 18:00 UT its sky motion was measured to be 1.00"/sec in RA and 0.91"/sec in Dec, with an apparent magnitude of 11.1 R. Astrometry was submitted to the MPC.

David Dunham (IOTA USA) kindly supplied an occultation elements file and this was used in Occult and OccultWatcher to compute occultations of stars by the asteroid, generating 3 probable events of 10th mag stars from my location. Because of its small size (1 km) and fast sky motion, these events were very low probability with maximum durations of 0.1s. They were recorded at 1/50th sec video rates. In two cases the star and PHA merged, but so far no brief dip has been found in the data.

Files associated with this observation

1994 PC1_20220119_1811_ARP.png (626.3 kB)

Like this image

David Basey, Callum Potter, Jeremy Shears, Nick James, Tim Haymes, Peter Carson

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