Basic object information

Object name: M 92
Object type: Globular cluster
Magnitude: 6.5
Size: 14.0'
Object classification: IV
Description: vB,vL,eCM,st 12...
Notes: Lord Rosse saw spiral structure

Catalog information

RA (J2000.0): 17h 17m 06.0s
Dec (J2000.0): +43 08' 00"

Constellation: Hercules

Observer: Iiro Sairanen
Obs. place: Tähtikallio, Artjärvi, Finland
Date/Time: 22/23.9.2007 2:00

Telescope: Meade LX 200 406/4064 mm

Magn: 308x


Field: 12'

NE Lim.mag: 6.3

Background sky: 2

Seeing: 3

Visuality: I

Height: 27

Weather: +5C, moist

This sketch has been made in annual deepsky-meeting in Artjärvi thru a 16" Meade LX 200. The weather was average but there was a huge amount of moist in the air. Also the correction lens has dewed up. Despite of that M92 was pretty interesting object. The overall shape is roundish. Several stars resolved all around the cluster, the brightest stars seemed to be on the edges but the background glow is strongest in the middle. There are also some brighter areas in the granular glow.