Observation by Alex Pratt: Video astrometry of Potentially Hazardou...

Uploaded by

Alex Pratt

Observer

Alex Pratt

Observed

2019 Oct 16 - 19:53

Uploaded

2019 Oct 18 - 16:23

Objects

162082 1998 HL1

Equipment

C11 f/10 with f/3.3 focal reducer
Watec 910 video camera
IOTA-VTI GPS time inserter
OccuRec (recorder)
Tangra (reduction)

Exposure

1.28s exposures

Location

Z92

Target name

Potentially Hazardous Asteroid (162082) 1998 HL1

Title

Video astrometry of Potentially Hazardous Asteroid (162082) 1998 HL1

About this image

This asteroid has an Amor-type orbit and the MPC categorise the object as PHA (Potentially Hazardous Asteroid). They comment that astrometry is useful for orbit improvement.

At mag 15 this was near my limit for video astrometry. Using an integration time of 1.28s I recorded some video sequences of 2 minutes' duration and submitted the following astrometry to the MPC

G2082 n2019 10 16.857533 22 02 04.12 +71 38 38.3 15.3 R Z92
G2082 n2019 10 16.871226 22 02 31.49 +71 37 42.1 15.3 R Z92
G2082 n2019 10 16.885752 22 03 00.57 +71 36 41.1 15.6 R Z92

Analysis with Tangra gave the object's motion as 0.11"/sec (RA) and 0.05"/sec (Dec) equivalent to 7.25"/min, close to the MPC Ephemeris. It should reach its maximum sky motion of 22.5"/min on Oct 26 and a peak brightness of mag 12.4 on Oct 27.

If the monsoon season abates I hope to monitor this asteroid until at least the end of the month.

Files associated with this observation

(162082) 1998 HL1 20191016_2053_ARP.jpg (478.8 kB)

Like this image

David Swan, Graham Winstanley, Mr Leonard Entwisle, Ray Emery, Jeremy Shears, Andy Wilson, Dr Paul Leyland, Andrew Dumbleton, Peter Carson

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