Deep Sky Object in Autumn
IC289 (Planetary Nebula in Cassiopeia)


Date & Time: Jan 16 2026, from 20:59 to 21:54 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


IC289 / Planetary nebula, type IV+II
R.A.03h 10m 19.7s (2000.0)
Dec.+61°19' 01" (2000.0)
Apparent Size48.0"
Real Size1.2 light yrs.
Magnitude12.3
Distance5190 light yrs.
Other IDsHubble 1, PK 138+2.1
This is a small planetary nebula located at the eastern edge of Cassiopeia. It can be found just 2.2 degrees east of the diffuse nebula IC1848, known as the "Soul Nebula." Its apparent diameter is 48 arcseconds, and it shows a slightly distorted ring shape, with a 16th-magnitude central star also visible. The distance from the Solar System is about 5200 light-years, giving it a real diameter of approximately 1.2 light-years.



IC59, IC63
IC348, IC1985 & its vicinity

Copyright(c) 2026 by Naoyuki Kurita, All rights reserved.
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