Waid Observatory

Object: vdB 123

Date: June 2022   -    Location: Davis Mountains west of Fort Davis, TX
Telescope: 10in, RC    -    Mount: Paramount MX  -  Camera: Apogee Alta F8300
Exposure: L = 225 min.  Bin 1x1 R = 200 min. G = 200 min. B = 220 min.  Bin 2x2

Guided using Innovations Foresight On Axis Guider (ONAG)

Click on the image to view at higher resolution.

vdb 123

vdB 123 - Reflection Nebula in Serpens

vdB 1231, as designated in the van den Bergh catalog2, is a blue reflection nebula7 located in the constellation Serpens approximately 800 light years (230 +/- 20 parsecs)3 from the Earth. This colorful nebula is embedded in a large cloud of dust and gas known as the Serpens Cloud3. This cloud overlays a rich field of background Milky Way stars. These background stars appear to be heavily "reddened" by the cloud's intervening dust. A large dark nebula extending throughout the region is cataloged Dobashi 12605,6. These areas of dense dust obscures background stars and other celestial objects. The bright blue central nebula shines from light reflected from the bright star designed HD 1706341. The blue color is a result of the surrounding dust reflecting the shorter wavelengths of light more efficiently than longer wavelengths. This is essentially the same phenomena that makes our Earthly sky appear blue.

Serpens Reflection Nebula

Just to the right of the blue vdB nebula is a red/orange bi-polar nebula known as the Serpens Reflection Nebula. (SNR)4 It is being illuminated by the relative low mass star designated Serpens/SVS 24. The nebula's outflow appears to be heavily influenced by embedded magnetic fields. This may have triggered the bi-polar shape of the nebula.

1vdB 123 -  http://www.irida-observatory.org/CCD/VdB123/VdB123.html
2vdB Catalog - http://www.emilivanov.com/CCD%20Images/Catalog_VdB.htm
3Serpens Molecular Cloud - https://arxiv.org/abs/0809.3652
4Serpens Reflection Nebulosity - https://articles.adsabs.harvard.edu//full/1997A%26A...323..541G/0000541.000.html
5Dobashi Catalog - https://academic.oup.com/pasj/article/63/sp1/S1/2898206
6Dobashi 1260 - https://www.universeguide.com/nebula/dobashi1260
7Reflection Nebula - https://en.wikipedia.org/wiki/Reflection_nebula

Copyright Donald P. Waid