Iiro's DeepSky Sketches

Name: NGC 457Other name: OCL 321
RA: 1h 19.5m DEC: +58° 17'
Constellation: CAS
Type: Open cluster
Magnitude: 6.4
Size: 13.0'
Number of stars: 80
Brightest star: 8.6
Classification: I 3 r
Description: Cl,B,L,pRi,*7,8,10
Notes: H VII 42,Phi Cas is not a member,Not incl in mag
Observer: Iiro Sairanen
Location: Ania, Pirkkala, Finland
Date: 16/17.9.2009 1:50
Instrument: Newton 300/1500 mm
Magnification: 214xFilter: -
Field: 23'Seeing: 2
Background sky: 2NE lim mag: 6.7
Visuality: IHeight: 79°
Weather: +7°C
Description: The Owl Cluster. A legendary owl figure is very obvious even at low powers. It barely fits in the field at 214x. Once you see it, you can't forget it. The clouds cut of the observing session so some field stars might be missing.
Updated: 17.11.2009 19:14