Comet Giacobini-Zinner on Aug 16 & 17, 2018

Date & Time: Aug 16 2018, from 27:10 to 27:33 JST(+0900)
Composed 8 shots with 3 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)
Device Size...20×20mm
Sensitivity...ISO4000, White Balance...Daylight

Comet Giacobini-Zinner with Nebulae of IC1805 & IC1848

Date & Time: Aug 17 2018, from 23:45 to 24:11 JST(+0900)
Composed 7 shots with 4min. exposed
Optical: BORG 60ED with a conversion lens (f=245mm, F4.1)
with IDAS LPS-D1 Light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial
Digital Camera: Canon EOS 6D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648)
Device Size...36×24mm, Sensitivity...ISO1600

The comet Giacobini-Zinner in that day has positioned in eastern edge of Cassiopeia, I could observe the approach with two vast reddish nebulae of IC1805 (right) and IC1848 (left) with a distance of about 2 degrees. The coma has a brightness of about 7th magnitude as with that in last week, and a dust tail with a length of a bit longer than a degree was stretched in WSW direction. The coma was surrounded with a greenish ionized composition; an apparent diameter could be estimated as 8 arc minutes measured with the upper image.
  The 1st image: View angle: 0.70×0.70°
  The 2nd image: View angle: 8.17×5.60°

Swift-Gehrels on Nov 2, 2018

Giacobini-Zinner on Aug 9, 2018

Copyright(c) 2018 by Naoyuki Kurita, All rights reserved.
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