Deep Sky Object in Spring
Sh2-313 (Planetary Nebula in Hydra)

Click on image to enlarge

Date & Time: Apr 10 2021, from 24:18 to 25:00 JST(+0900)
Composed 9 shots with 5 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-V4 Light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial+SBIG STV
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...ISO2500


Sh2-313 / Planetary Nebula, type IIIa
R.A.12h 53m 41.4s (2000.0)
Dec.-22°51' 42" (2000.0)
Apparent Size12.8'
Real Size1.9 light yrs.
Magnitude12.0
Distance520 light yrs.
Other IDsAbell 35, PK 303+40.1
Sh2-313 is a vast but faint planetary nebula positioned at about 4.5 degrees east of beta Corvi. Strictly the nebula is lying in the territory of Hydra just south of Corvus. The nebula has a central star of 9.6th magnitude and an elliptical shape elongated in east west direction with a long axis of 12.8 arc minutes. The reddish H-alpha and the greenish OIII lines are emitted from outer and central parts, respectively. Although the nebula has been classified as comparatively larger planetary one, fairly longer exposure time is required to photograph on digital imagers.
This image has been cropped with an equivalent focal length of 700mm.



Sh2-290
Abell 36

Copyright(c) 2021 by Naoyuki Kurita, All rights reserved.
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