Deep Sky Object in Winter
Abell 13 (Planetary Nebula in Orion)


Date & Time: Jan 20 2023, from 23:29 to 24:26 JST(+0900)
Composed 8 shots with 8 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with IDAS LPS-P1 Light-pollution suppression filter
Auto-guided with Meade LX200 Equatorial & Lacerta M-GEN
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)
Device Size...20×20mm
Sensitivity...ISO4000, White Balance...Daylight


Abell 13 / Planetary Nebula, type IV
R.A.06h 04m 47.8s (2000.0)
Dec.+03°56' 36" (2000.0)
Apparent Size2.2'
Real Size2.5 light yrs.
Magnitude16.0
Distance3900 light yrs.
Other IDsPK 204-8.1
This image shows you a small planetary nebula located in the eastern part of Orion, 4.2 degrees southeast of Betelgeuse. You can clearly see in the image that it looks like a red ring with a diameter of just over 2 arc minutes, but it is 16th magnitude and very faint, it is quite difficult to see it visually with scopes. A central star is so faint as about 20th magnitude that it is undetectable in this image. The distance is estimated as 3900 light years.



Abell 7 & Crimson Star
Abell 24

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