Deep Sky Object in Winter
NGC2242 (Planetary Nebula in Auriga)


Date & Time: Nov 21 2025, from 25:51 to 27:12 JST(+0900)
Composed 8 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


NGC2242 / Planetary nebula
R.A.06h 34m 07.6s (2000.0)
Dec.+44°46' 37" (2000.0)
Apparent Size22.0"
Real Size0.7 light yrs.
Magnitude15.1
Distance6500 light yrs.
Other IDsPNG 170.3+15.8
NGC2242 is a small planetary nebula hidden about 6 degrees east of β Aurigae, the star marking the northeastern corner of Auriga's pentagon. It has a reddish, nearly circular appearance with an apparent diameter of only 22 arcseconds; in this image it appears indistinct, and its central star is of about 17th magnitude. The distance from the Solar System is estimated to be around 6500 light-years.



Southern region of Rosette Nebula
NGC2316

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