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Observation by David Swan: 21P: brightening nicely

Uploaded by

David Swan

Observer

David Swan

Observed

2018 Aug 10 - 21:15

Uploaded

2018 Aug 10 - 23:52

Objects

21P Giacobini-Zinner

Planetarium overlay









Constellation

Cassiopeia

Field centre

RA: 01h42m
Dec: +66°16'
Position angle: -59°56'

Field size

0°30' × 0°20'

Equipment
  • 200mm SCT @ f/7
  • ASI183MM
  • Baader UV+IR cut
  • FireCapture, DeepSkyStacker and Astrometrica
  • Comphot
Exposure

33 x 20s

Location

Tynemouth, UK

Target name

21P/Giacobini-Zinner

Title

21P: brightening nicely

About this image

The coma is estimated to have a diameter of just over 9 arcmin.

10x10  20x20  30x30  40x40  50x50  60x60

 11.00  10.15   9.72   9.43   9.22   9.05 # Counts

 11.00  10.20   9.76   9.47   9.26   9.09 # Median annuli

Total integrated magnitude: 7.92 (radius 270.7 arcsec)

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