Deep Sky Object in Spring
PK221+46.1 (Planetary Nebula in Leo)

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Date & Time: Feb 23 2020, from 23:37 to 25:33 & Mar 20 2020 from 22:42 to 24:39 JST(+0900)
Composed 48 shots with 5 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-D1(Feb 23) & LPS-V4(Mar 20) Light-pollution suppression filters
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...ISO1600(Feb 23), ISO3200(Mar 20)


PK221+46.1 / Planetary Nebula, type SNR?
R.A.09h 52m 59.1s (2000.0)
Dec.+13°44' 33" (2000.0)
Apparent Size12.0'
Real SizeN/A
Magnitude10.4
DistanceN/A
This image shows you an extraordinary indistinct supernova remnant positioned at 4.3 degrees WNW of Regulus, alpha Leo. Although the remnant has a comparatively larger diameter of 12 arc minutes, is needed a good-conditioned night to take its shape. This image somehow shows a bit warped ring-shape.
This image has been cropped with an equivalent focal length of 700 mm.



PK164+31.1
PK238+34.1

Copyright(c) 2020 by Naoyuki Kurita, All rights reserved.
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