Deep Sky Object in Spring
Sh2-71 (Planetary Nebula in Aquila)
|Date & Time: ||Apr 30 2017, from 26:55 to 27:29 JST(+0900)
|Composed 12 shots with 3 minutes exposed|
|Optical: ||Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
|Auto-guided with Meade LX200 Equatorial & Pictor 201XT
|Digital Camera: ||Nikon D810A
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)|
|Sensitivity...ISO6400, White Balance...Daylight|
Sh2-71 is a planetary nebula bathed in the Milky Way of western Aquila. The nebula has a long axis of 2.6 arc minutes and about 3400 light years away.
You detect the nebula as a reddish ringed shape in images taken with smaller telescopes.
Actually the nebula has the jet-structures in north south direction, grouped into the bipolar typed planetary.
It's known that a central star is a dimmed variable with a period of about 17 days.
|Sh2-71 / Planetary Nebula, type IIIb+III|
|R.A.||19h 02m 00.0s (2000.0)|
|Dec.||+02° 09' 23" (2000.0)|
|Real Size||2.5×1.4 light yrs.|
|Distance||3400 light yrs.|