Deep Sky Object in Autumn
Molecular cloud around δ Arietis

Click on image to enlarge

Date & Time: Dec 9 2018, from 19:23 to 20:26 JST(+0900)
Mosaic of 2 flames of 2min.×15shots
Optical: TAMRON SP 300mmF2.8, Aperture: F3.5
with IDAS LPS-P2 Light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(7360×4912)
Device Size...FX format(36×24mm)
Sensitivity...ISO1600, White Balance...Daylight


This field image covers the eastern Aries, around δ Ari with a span of 5.0×5.7 degrees. In this vicinity, we can detect an extraordinary dimmed but complicated molecular cloud on long-exposed digital devices. This cloud forms a part of vast "Taurus molecular clouds" spread around east of this image. You can appreciate a fairly striking structure from LBN763 at northern δ Ari to LBN743 at southern ε Ari; nebulosities around ρ Ari have IDs of LBN753 and LBN762.

Distribution of the molecular cloudand star names Distribution of the molecular cloud and star names



Molecular cloud at western Pisces
Molecular cloud around η Arietis (Around LBN703)

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