Deep Sky Object in Autumn
PK138+4.1 (Sh2-200, Planetary Nebulae in Cassiopeia)

Click on image to enlarge

Date & Time: Jan 21 2023, from 19:42 to 21:10 JST(+0900)
Composed 12 shots with 8 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-D1 Light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial+SBIG STV
CMOS Camera: ZWO ASI2600MC Pro (Cooled temp.: -25°C)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...16bit FITS, converted to 16bit TIFF(6248×4176)
Device Size...23.5×15.7mm, Gain...100


PK138+4.1 / Planetary Nebula
R.A.03h 11m 02.1s (2000.0)
Dec.+62°47' 57" (2000.0)
Apparent Size5.7'
Real Size6 light yrs.
Magnitude -
Distance3600 light yrs.
Other IDSh2-200, HDW 2
Cr 36 / Open Cluster, type III 2 m
R.A.03h 12m 00.0s (2000.0)
Dec.+63°11' 00" (2000.0)
Apparent Size23.0'
Real SizeN/A
# of Stars30
Magnitude7.0
DistanceN/A
Other IDTR 3, Harvard 1
This image captures a faint planetary nebula located in the eastern edge of Cassiopeia near the border with Camelopardalis. It has a circular shape with a diameter of about 6 arc minutes, and a streak-like structure can be seen inside. It is nicknamed "Bear claw Nebula" because its shape resembles sweet bread popular mainly in the United States. You can see that very faint Hα nebula surrounds the planetary nebula body. This nebula extends to a small open cluster Cr 36 located about 20 arc minutes north.



Around PK136+5.1, Abell 6
PK149-3.1

Copyright(c) 2023 by Naoyuki Kurita, All rights reserved.
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