Deep Sky Object in Winter
NGC1999 (Reflection Nebula in Orion)
|Date & Time: ||Nov 29 2013, from 24:14 to 24:56 JST(+0900)
|Composed 8 shots with 6 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: ||Canon EOS 600D (Remodeled)
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)|
A small reflection nebula only 1degree SSE of the Great Orion Nebula(M42) is named NGC1999.
The nebula has an apparent diameter of only 1 arc minute.
|NGC1999 / Reflection Nebula, type 1 E|
|R.A.||05h 36m 30.0s (2000.0)|
|Dec.||-06° 42' 00" (2000.0)|
|Apparent Size||about 1'|
|Real Size||0.9 light yrs.|
|Distance||1500 light yrs.|
|Other IDs||IC427-428, LBN979|
This object looks like a compact ring because a lump of dark nebulosity is obstructing a white gas in background.
A newborn star of V380 with a magnitude of 10.5 is shining in eastern region of the nebula and NGC1999 is glittering by the star.
In January 2000, the Hubble Space Telescope (HST) took a splendid shot of NGC1999, the shot made this faint object popular overnight.
The nebula is lying about 1500 light years away, just in the Orion Association.
And there are very dimmed reddish nebulosities about 2 arc minutes south of NGC1999.
The region contains a cluster of deeply embedded young stars which power oppositely directed bow shocks.
These objects were first recognized by Guillermo Haro and George Herbig around 1950 and today they are known as HH 1 and HH 2.
This type of active objects are known as Herbig-Haro (HH) objects, which move through the surrounding gas at speeds of up to hundreds of kilometers per second (over 100,000 miles an hour).
Now several hundreds of HH objects distributed in heavens are registered in HH catalogue.
||Magnification image around NGC1999
A pair of gaseous region just south of NGC1999 is HH1 & HH2.