Waid Observatory

Object: M35 & NGC 2158
Feb. 21, 2018    -    Location: Davis Mountains west of Fort Davis, TX
Telescope: Stellarvue SV102ED   Mount: MI-250   Camera: ST-8300M
Exposure: Lum = 90 min.   R G & B = 60 min. each  -  10 min. Sub-exposures
Click on the image below to view at higher resolution.



M35 & NGC 2158 1

  Discovered by Philippe Loys de Cheseaux 1745-46.

M35 is an open star cluster of roughly circular shape covering an area approximately the size of the full moon.  It consists of several hundred stars of which over a hundred are brighter than magnitude 13.  The density of stars in the center of the cluster is about 6 per cubit parsec.  The distance across the cluster is about 24 light-years and its distance from the earth is estimated to be 2,800 light years in the constellation Gemini.  The age of the cluster is approximately 100 million years.  M35 is approaching us at 5 km/sec.

Located in the lower right of the image above is the much more distant open cluster, NGC 2158.  Its age is over 10 times that of M35 and its is composed of older, yellower, stars.  Its distance is estimated to be about 11,000 light-years .


Copyright Donald P. Waid