Iiro's DeepSky Sketches

Name: NGC 3998	Other name: UGC 6946
RA: 11h 57.9m	DEC: +55° 27'
Constellation: UMA
Type: Galaxy
Magnitude: 10.7
Size: 2.7' x 2.3'
PA: 140°
Surface brightness: 12.5
Classification: SO
Description: cB,pS,R,vg,smbM
Notes: H I 229,comp 4.7',PA145,0.3'X0.3'
Observer: Iiro Sairanen
Location: Haakanala, Rautjärvi, Finland
Date: 21/22.4.2012 2:30
Instrument: Newton 457/2280 mm
Magnification: 457x	Filter: -
Field: 9'	Seeing: 3
Background sky: 2	NE lim mag: 6.5
Visuality: I	Height: 63°
Weather: -3°C, astronomical twilight
Description: Round galaxy with brighter core. 12.5 mag NGC 3990 on the west-side.
Updated: 4.11.2012 20:27