Deep Sky Object in Spring
NGC3115 (Spindle Galaxy in Sextans)
|Date & Time: ||Mar 28 2009, from 22:44 to 23:20 JST(+0900)
|Composed 4shots with 12 minutes exposed|
|Optical: ||Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
|with BaaderPlanetarium Moon & Skyglow filter|
|Auto-guided with Meade LX200 Equatorial & Pictor 201XT
|Digital Camera: ||Nikon D50 (Remodeled)
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording Format...12bit CCD-RAW, converted to 8bit TIFF(3008×2000)|
A minor constellation of Sextans is lying just south of Leo in the spring skies,
and a bright edge-on galaxy of NGC3115 is positioned around the southern edge of this inconspicuous constellation.
The galaxy can be caught in view circle of telescopes by using of alpha Hydrae (Alphard) as a guide star and trace 9.3 degrees east from the star.
|NGC3115 / Galaxy, type S0-sp|
|R.A.||10h 05m 14.1s (2000.0)|
|Dec.||-07° 43' 07" (2000.0)|
|Distance||21.8 million light yrs.|
|Group of Galaxies||NGC3115 Group|
|Other IDs||MCG-1-26-18, UGCA199|
It's a noticeable characteristic that the galaxy's central bulge is fairly larger than that of many other typical edge-on galaxies like NGC4565.
This apparent shape of NGC3115 has given a nickname of "Spindle Galaxy".
You can see a considerably bright nucleus through large-sized telescopes, and looks like a simple oval lump of light rather than the shape of spindle.
NGC3115 has been classified in a group of "Lenticular (S0)", and a distance is estimated about 22 million light years.