Observation by Alex Pratt: (3578) Carestia occults UCAC4 478-133911

Uploaded by

Alex Pratt

Observer

Alex Pratt

Observed

2025 Jul 12 - 22:27

Uploaded

2025 Jul 15 - 10:41

Objects

3578 Carestia
Lightcurve

Equipment

C11 f/10 and f/3.3 focal reducer
DVTI+CAM 430
DVTI Camera Control Tool
Tangra and AOTA (reduction)

Exposure

0.100s

Location

Z92 - Leeds, West Yorkshire (Bortle 7)

Target name

(3578) Carestia occults UCAC4 478-133911

Title

(3578) Carestia occults UCAC4 478-133911

About this image

The 50 km-diameter mag 14.6 asteroid (3578) Carestia was predicted to occult a mag 12.6 star in Pegasus for up to 4.6s. After some weeks of poor sky quality and now the light summer nights I was pleased to get this positive observation

I was 5 km outside the 50 km-wide predicted shadow. A path shift of about 30 km to the SW gave me a success. The target star's RUWE(Gaia) is 1.15.

My timings were:

Event time in UTC

D: 22 27 27.73 ± 0.05

R: 22 27 31.33 ± 0.05

The mid-time will be used for high-accuracy astrometry of the asteroid.

Unfortunately, the six other observers (in mainland Europe) were clouded out, so we only got one chord across the asteroid - several are needed to derive a shape profile.

Files associated with this observation

(3578) Carestia 20250712_222730_ARP.png (356.5 kB)

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Dominic Ford

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