Basic object information
Object name: NGC 3680
Object type: Open cluster
Magnitude: 7.6
Size: 7.0'
Number of stars: 30
Magnitude of brightest star: 10.1
Object classification: I 2 p
Description: Cl,cL,pRi,lC,*10..14

Catalog information
RA (J2000.0): 11h 25m 36.0s
Dec (J2000.0): -43 15' 00"

Constellation: Centaurus

Observer: Iiro Sairanen
Obs. place: Pico de la Nieve (1900 m), La Palma, Spain
Date/Time: 30/31.3.2008 2:20

Telescope: Newton 110/805 mm

Magn: 115x

Filter:

Field: 43'

NE Lim.mag: 7.2

Background sky: 2

Seeing: 2

Height: 16
Visuality: I
Weather: +7C, windy

A nice and loose group of 10-13 mag stars. There are six brighter members surrounded by several fainter ones.