Deep Sky Object in Spring
Jupiter Nebula (NGC3242 in Hydra)
|Date & Time: ||Mar 19 2005, from 23:38 to 23:58 JST(+0900)
|Composed 4shots with 4 minutes & 4shots with 1 minute exposed|
|Optical: ||VIXEN 20cm(3.9") VISAC (f=1800mm, F9.0)
|Auto-guided with TAKAHASHI JP Equatorial & Meade Pictor 201XT
|Digital Camera: ||Nikon D70 (Remodeled)
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording Format...12bit CCD-RAW, converted to 8bit TIFF(3008×2000)|
NGC3242 is a small but bright planetary nebula just locates mu Hydrae at the middle of constellation then move south about 2 degrees.
Elliptical gaseous region and a bit dark round nebula in the exterior surround a dark central star.
This planetary nebula is often called "The Jupiter Nebula" because of its slight resemblance.
|NGC3242 / Planetary Nebula, type IIIb+IV|
|R.A.||10h 24m 48.0s (2000.0)|
|Dec.||-18° 38' 00" (2000.0)|
|Real Size||0.37×0.32 light yrs.|
|Distance||1890 light yrs.|
The nebula has a visual magnitude of 9 but a high surface contrast, clearly visible even in small telescopes.
Trying to appreciate the inner ellipse could prove difficult, large telescopes should show the object as resembling a bluish eye with the central dwarf star the pupil.
A dead star about 1900 light years away formed this nebula.