Deep Sky Object in Winter
Around Sh2-216, Sh2-221 (Planetary Nebula & Supernova remnant in Auriga)

Date & Time: Jan 4 2016, from 19:58 to 21:29 JST(+0900)
Mosaic of 3 flames of 6min.×5shots
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-V4 Light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial & SBIG STV
Digital Camera: Canon EOS 6D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648)
Device Size...35×24mm, Sensitivity...ISO3200

This image has captured dimmed nebulosities in northwest edge of Auriga, positioned at 2 to 5 degrees west of Capella.
In right (west) of the image, you can see Sh2-216 with a diameter of about 3 degrees. The nebula has been considered one of closest and ancient planetary nebulae. Actually Sh2-216 has about round shape, but the western part is extraordinary dimmed so this image shows you only eastern part as an arc-like shape. And in opposite left side a supernova remnant of Sh2-221 has been distributed in span of about 4 degrees. You can recognize the filament-like structures mistily.
In north of Sh2-221, two tiny emission nebulae can be seen. Sh2-217 has a size of about 7 arc minutes, and another one of Sh2-219 just 20 arc minutes southwest of Sh2-217 has a round shape with a diameter of 2 arc minutes. These nebulae are lying over 10 thousand light years away, have no relations with Sh2-216 and Sh2-221.

Sh2-216 / Planetary Nebula, type 4 E
R.A.04h 45m 30s (2000.0)
Dec.+46° 50' 00" (2000.0)
Apparent Size180'
Real Size20 light yrs.
Magnitude -
Distance390 light yrs.
Other IDsLBN 744
Sh2-221 / Supernova Remnant, type 6 E
R.A.04h 54m 48.0s (2000.0)
Dec.+46° 41' 00" (2000.0)
Apparent Size240'
Real SizeN/A
Magnitude -
Other IDsLBN 754
Sh2-217 / Diffused Nebula, type 3 E
R.A.04h 58m 42.0s (2000.0)
Dec.+47° 59' 49" (2000.0)
Apparent Size7.3×6.3'
Real Size44 light yrs.
Magnitude -
Distance17000 light yrs.
Other IDLBN 745
Sh2-219 / Diffused Nebula, type 3 E
R.A.04h 56m 11.7s (2000.0)
Dec.+47° 23' 37" (2000.0)
Apparent Size2.0'
Real Size12 light yrs.
Magnitude -
Distance14000 light yrs.
Other IDLBN 747


Sh2-223, 224

Copyright(c) 2016 by Naoyuki Kurita, All rights reserved.
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