Deep Sky Object in Spring
Abell 16 (Planetary Nebula in Lynx)


Date & Time: Nov 1 2025, from 26:58 to 27:52 JST(+0900)
Composed 10 shots with 6 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(2040×2040)
Device Size...10×10mm
Sensitivity...ISO4000, White Balance...Daylight


Abell 16 / Planetary nebula, type IIb
R.A.06h 43m 54.9s (2000.0)
Dec.+61°47' 25" (2000.0)
Apparent Size2.3'
Real Size3 light yrs.
Magnitude15.9
Distance4500 light yrs.
Other IDsPK 153+22.1
This extremely faint planetary nebula is located at the northernmost end of Lynx, right along its boundary with Camelopardalis. It has an apparent diameter of 2.3 arcminutes, and its central star is of 17th magnitude. Although few studies exist, its distance is estimated to be about 4500 light-years. You can see that it forms a beautiful, slightly reddish circle.



Sh2-313
Abell 30

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