* Astronomy

NGC 2420 (OCL 488) is a magnitude +8.3 open cluster located 8600 light-years away in the constellation Gemini.  

The cluster can be found towards the east of Delta Geminorum using 7 x 50 binoculars.
The cluster lies about 3,000 light-years above the galactic disk. The average composition is similar to that of the Sun, and may have been displaced from the galactic disk due to an interaction with a massive object.
The estimated age of the cluster is 1.7 billion years old.
NGC 2420 has more than 300 stars, contained within a diameter of approximately 30 light-years. The cluster contains a large number of binary stars, with a surprisingly high twin ratio, ie systems in which both components have a similar mass.
The brightest star is of visual magnitude +11.0.

The open cluster was discovered by German-British astronomer William Herschel using a 47.5 cm (18.7 inch) f/13 speculum reflector at Datchet, Berkshire, on the 19th November 1783. 

Right Ascension 07^h 38^m 23.8^s, Declination +21° 34' 27"