Deep Sky Object in Autumn
Saturn Nebula (NGC7009 in Aquarius)

Date & Time: Dec 13 2003, from 18:34 to 18:56 JST(+0900)
Composed 4 shots with 5 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain (f=2500mm, F10.0)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Fujifilm FinePix S2 Pro
Location: Ooizumi vil., Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3024×2016)
CCD Sensitivity...ISO1600, White Balance...Auto

NGC7009 / Planetary Nebula, type IV+VI
R.A.21h 04m 12.0s (2000.0)
Dec.-11° 22' 00" (2000.0)
Apparent Size44×26"
Real Size0.31×0.18 light yrs.
Distance1430 light yrs.
In western part of Aquarius, it's a small planetary nebula lying about 4.5 degrees southeast from epsilon Aqr. This nebula is well known as "Saturn Nebula" because the nebula has projections in both sides. The central round part has a diameter of about 30 arc seconds, your telescope-aided eyes can detect uneven structures in central part. NGC7009 is a remnant of star about 1430 light years away.

⇒ Display the spectral profile of NGC7009
(in new window)



Copyright(c) 2004 by Naoyuki Kurita, All rights reserved.
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