NGC 6709 is a loose open cluster (type III2m) in the constellation Aquila. NGC 6709 contains about 60 stars and has an estimated age of 315 million years.¹ It lies about 5° southwest of the star Zeta Aquilae and about 6° northeast of the open cluster IC 4756. Three of its most prominent stars form the shape of a right-triangle.

 

visual magnitude	6.7
angular diameter	15'
distance	3,900 ± 570 light-years (1190 ± 175 pc)1
position	RA 18h 51m 18s, Dec +10° 19' 06"
other designations	Melotte 214, GC 4440, C 1849+102, OCISM 21, OCL 100.0

 

Reference

1. Subramaniam, A. and Sagar, R. "Multicolor CCD photometry and stellar evolutionary analysis of NGC 1907, NGC 1912, NGC 2383, NGC 2384, and NGC 6709 using synthetic color-magnitude diagrams." The Astronomical Journal, 117, 937–961 (1999).