Waid Observatory

Object:NGC 6940
Sept. 27-28, 2018    -    Location: Davis Mountains west of Fort Davis, TX
Telescope: Stellarvue SV102ED   Mount: MI-250   Camera: ST-8300M
Exposure: Lum = 120 min.   R G & B = 90 min. each  -  5 min. Sub-exposures
Click on the image below to view at higher resolution.

 

 

NGC 6940 1

NGC 6940 is an open cluster in the constellation Vulpecula approximately 2,500 light-years distant.  The age of the cluster has been estimated to be around 1 billion years.  The stars of the cluster are somewhat scattered with non-member field stars visible between cluster stars.  The bright blue stars in the image are probably either foreground or background stars.  The brightest cluster star is the red giant VG Vulpeculae.  It is a semiregular variable star that varies in magnitude between 9.0 and 9.5 approximately every 80 days.

1https://en.wikipedia.org/wiki/NGC_6940

 
Copyright Donald P. Waid