Comet Borisov on early morning of Oct 10, 2019


Date & Time: Oct 9 2019, from 27:03 to 28:15 JST(+0900)
Composed 18 shots with 4 minutes exposed
Optical: VIXEN 20cm(7.9") VISAC with conversion lens (f=1278mm, F6.4)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with TAKAHASHI EM-200 Equatorial & Lacerta M-GEN
Digital Camera: Nikon D810A
Location: Hiraiso, Hitachi-naka city, Ibaraki pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(7360×4912)
Device Size...FX format (36×24mm)
Sensitivity...ISO3200, White Balance...Daylight


In that day, the first interstellar comet of Borisov from out of solar system was positioned at about 9.5 degrees northwest of Regulus, alpha Leo in dawn eastern skies. I could catch the faint star-like image with 17th magnitude somehow with over-hour exposure. Presently, larger telecsopes have detected similar spectrum with normal inner-solar system comets. The comet Borisov will move southward from now on, we can chase it until the end of 2019 at northern hemisphere.
  The images is cropped with equivalent focal length of 1600mm: View angle: 1.28×0.85°


Borisov on early morning of Nov 4, 2019
Africano on Oct 26, 2019

Copyright(c) 2019 by Naoyuki Kurita, All rights reserved.
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