Deep Sky Object in Winter
Around Sh2-273 (Vast Nebulosity around Cone Nebula)

Click on image to enlarge

Date & Time: Dec 27 2025, from 23:25 to 24:57 JST(+0900)
Composed 16 shots with 6 minutes exposed
Optical: AF zoom-Nikkor 80-200mmF2.8ED (f=135mm, stop: F4.0)
with IDAS LPS-D1 light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial
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


Sh2-273 / Diffused Nebula, type 1 E
R.A.06h 37m 36.0s (2000.0)
Dec.+09° 50' 00" (2000.0)
Apparent Size140'
Real Size190 light yrs.
Magnitude -
Distance2600 light yrs.
Other IDsLBN911
This star field image including the Cone Nebula has captured 10×6.7° in span. A variable star of S Mon is glittering around center of image, and fine stars of open cluster is distributing around the star.
Very huge reddish nebulosities occupy almost this entire field. Its indistinct expanse extends to around the Rosette Nebula at 6 degrees southward. The complicated structures can be appreciated only in photographs. You can see a flow of dark nebulae B38 and B39 in northwest of this image.
Deepsky objects around Sh2-273 Nebulae & Star clusters around Sh2-273

Italic indicates numbers of open clusters



Around Sh2-267 to Sh2-271
Sh2-278

Copyright(c) 2025 by Naoyuki Kurita, All rights reserved.
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