Basic object information

Object name: PK 144-15.1 (Abell 4)
Object type: Planetary nebula
Magnitude: 16.7
Size: 22.0"
Surface brightness: 12.4 Size: 22.0"
Magnitude of central star: 19.4
Object classification: 3b

Catalog information

RA (J2000.0): 02h 45m 24.0s
Dec (J2000.0): +42 33' 00"

Constellation: Perseus


Observer: Iiro Sairanen
Obs. place: Härskiänsaari, Ruokolahti, Finland
Date/Time: 4/5.12.2005 22:25

Telescope: Newton 457/2280 mm

Magn: 309x

Filter: (UHC)

Field: 10'

NE Lim.mag: 6.4

Background sky: 3

Seeing: 3

Height: 71
Visuality: III
Weather: -10C

A planetary nebula which has a very low surface brightness. Filters do improve the view but not much. Mainly an even brightness disk where might be a brightening in the middle. In the photos this planetary is a ring with very faint central star. The nearby galaxy PGC 10427 was out of sight.