British Astronomical Association
Supporting amateur astronomers since 1890

BAA Images Alex Pratt

Observation by Alex Pratt: (618) Elfriede occults TYC 4698-00467-1

Uploaded by

Alex Pratt

Observer

Alex Pratt

Observed

2021 Feb 01 - 19:26

Uploaded

2021 Feb 02 - 10:48

Objects

618 Elfriede

Equipment
  • C11 f/10 and f/3.3 focal reducer
  • Watec 910 video camera
  • IOTA-VTI GPS time inserter
  • OccuRec (recording)
  • Tangra and AOTA (reduction)
Exposure

0.04 s

Location

Z92

Target name

(618) Elfriede and TYC 4698-00467-1

Title

(618) Elfriede occults TYC 4698-00467-1

About this image

I was almost on the centreline for this event, with ~100% probability of a successful observation, if only the weather cooperated. The 128 km diameter asteroid (618) Elfriede was predicted to occult a mag. 8.8 star in Cetus for up to 6 seconds.

I was fortunate to be under a clear sky and recorded the 5 mag. drop in brightness lasting for 6.16 s

    D  - 19 26 15.48 ± 0.02

    R  - 19 26 21.64 ± 0.02

Other observers were either clouded out or too far away from the 141 km-wide shadow track.

Shortly after this event the sky gradually clouded over, heralding the oncoming snowfall.

 

 

Files associated with this observation
Like this image
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.