Harvard 20

open cluster Harvard 20 (catalog)
Cr 408 •OCL 116 •Lund 910 •
Position (epoch J2000)
Constellation	Sagitta
Position	Ra 19:53:27.5 Dec +18:19:12
DSS images	10' · 20' · 30' · 45' · 1°
Appearance
Photo by André Hartmann, RC-203/1624, FOV:40'x28', 3 September 2011, Berlin
Apparent mag.	7.7
Size	6 '
Class	IV 2 p
Stars	15 stars Brightest star: 9.8m
Other
Notes
List:Open clusters in Sagitta
Map: RA 19.875, DEC 18.75 •

Harvard 20 (Collinder 408) is an open cluster in Sagitta.

Appearance

Telescopes 101mm - 141mm (4" - 5.5"), binoculars 71mm - 100mm

• (hr)Harvard 20 with 4.5" (114mm) f/8 homemade dobson (babydob), 25x, 48x by Ante Perković (NOT SEEN, Nov 18 2003, LM=5.5)  

Telescopes 141mm - 177mm (5.6" - 6.9")

• Harvard 20 observation and sketch by Jere Kahanpää with Reflector 150/2063  

Telescopes 178mm - 234mm (7" - 9.2")

• (IAAC) Obj: Harvard 20 - Inst: 8" f/5 newtonian  
• Harvard 20 observation and sketch by Jaakko Saloranta with 8" Orion DSE @ 120x  
• (hr)Harvard 20 with 8" (203mm) f/5 dobson (Orion Skywatcher), 111x by Ante Perković (SEEN, Jul 17 2010, LM=5.7)  

Telescopes 235mm - 305mm (9.25" - 12")

• Harvard 20 observation by Tom Polakis with 10" and 13"  

Telescopes 306mm - 381mm (12.1" - 15")

• Sagitta by Steve Coe - Harvard 20 with 13.1" f/5.6  
• Harvard 20 observation by Eric Van der Jeught @ deepskylog.be (with Orion Optics OD350S (reflector 350mm/1645mm)   (1)
• Harvard 20 observation by Eric Van der Jeught @ deepskylog.be (with Orion Optics OD350S (reflector 350mm/1645mm)   (2)
• Harvard 20 observation by Jeff Burton (x.astrogeek.org) with AstroSystems TeleKit 14.5" Reflector 

Telescopes above 15"

• Harvard 20 observation and sketch by Iiro Sairanen with Newton 406/1830mm  

Notes

Globular cluster Messier 71 is just 30' to the north.