Basic object information

Object name: NGC 2857
Popular name: Arp's Spiral
Object type: Galaxy
Magnitude: 12.5
Size: 2.2'x2.0'
Position angle: 138
Object classification: Sc
Description: vF,pL,4 st p
Notes: Arp's spiral w low surf brightness;2 very long thin arms

Catalog information

RA (J2000.0): 09h 24m 36.0s
Dec (J2000.0): +49 21' 00"

Constellation: Ursa Major


Observer: Iiro Sairanen
Obs. place: Härskiänsaari, Ruokolahti, Finland
Date/Time: 16/17.1.2007 23:05

Telescope: Newton 457/2280 mm

Magn: 457x

Filter:

Field: 9'

NE Lim.mag: 6.5

Background sky: 4

Seeing: 3

Visuality: III

Height: 64


Weather: +0C, windy, northern lights

Arp's Spiral. Quite low surface brightness, might be fractionally brighter in the middle. Round. A small, faint and almost stellar galaxy PGC 26694 (15.8 mag) is on the NE.