Reflection Nebula NGC 1999 in Orion

The image is a 10 minute exposure with an SBIG ST-6 CCD camera thru an Optical Guidance Systems 20 inch F/8.1 Ritchey-Chretien Cassegrain. North is as top, and the field is about 5x7 arc minutes.

Click here to see a large annotated version of this picture.

About l degree south of the Great Orion Nebula lies the small reflection nebula NGC 1999. It enfolds the 10th magnitude variable star V380 Orionis. The star is nearly obscured by a remarkable, sharply bounded dark patch. A few arc minutes farther south is a fine example of Herbig-Haro objects, tiny nebulous blobs that arise from jets of gas squirting in opposite directions from a star-forming disk. The blobs light up where they strike surrounding gas

Click here to see a larger version of our CCD image, which shows the Herbig-Haro objects, which range from magnitude 18.5 to 21.5.

Description of NGC 1999 in
The Deep Sky Field Guide to Uranometria 2000:

Bright roundish nebula; illuminating star is V380 Ori (visual magnitude = 10.3).

• NGC 1999
• Constellation: Orion
• RA: 05h 36m 30.0s
• Dec: -06d 42' 00" Epoch 2000
• Size (mins): 16.0
• Classification: reflection nebula.
  

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George Normandin, KAS
GeorgePN@worldnet.att.net

January 10th, 1998