Deep Sky Object in Summer
NGC6309 (Planetary Nebula in Ophiuchus)
|Date & Time: ||Apr 28 2007, from 24:49 to 25:01 JST(+0900)
|Composed 4 shots with 3 minutes exposed|
|Optical: ||TAKAHASHI 12.5cm(4.9") fluolite refractor with conversion lens (f=1400mm, F11.2)
|Auto-guided with VIXEN ATLUX Equatorial & Meade Pictor 201XT
|Digital Camera: ||Fujifilm FinePix S2Pro
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3024×2016)|
|CCD Sensitivity...ISO1600, White Balance...Auto|
NGC6309 is a compact planetary nebula about 3 degrees NNE from eta Oph.
The nebula has a size of about 16 arc seconds and 10th magnitude in visual brightness, and a shape of elongated in north south direction.
You can appreciate the figure like this photograph with high-powered telescopes.
|NGC6309 / Planetary Nebula, type IIIb+VI|
|R.A.||17h 14m 04.5s (2000.0)|
|Dec.||-12° 54' 41" (2000.0)|