Iiro's DeepSky Sketches

Name: Messier 92	Other name: NGC 6341
RA: 17h 17.1m	DEC: +43° 8'
Constellation: HER
Type: Globular cluster
Magnitude: 6.5
Size: 11.2'
Surface brightness: 11
Classification: IV
Description: vB,vL,eCM,st 12...
Notes: Lord Rosse saw spiral structure
Observer: Iiro Sairanen
Location: Sienimäki, Imatra, Finland
Date: 17/18.9.2010 23:15
Instrument: Newton 300/1500 mm
Magnification: 429x	Filter: -
Field: 11'	Seeing: 3
Background sky: 4	NE lim mag: 6
Visuality: I	Height: 46°
Weather: +7°C, astronomical twilight
Description: Strongly elliptical in N-S and two brighter areas on the north. Brighters stars on the east and north edge.
Updated: 28.9.2010 20:06
Name: Messier 92	Other name: NGC 6341
RA: 17h 17.1m	DEC: +43° 8'
Constellation: HER
Type: Globular cluster
Magnitude: 6.5
Size: 11.2'
Surface brightness: 11
Classification: IV
Description: vB,vL,eCM,st 12...
Notes: Lord Rosse saw spiral structure
Observer: Iiro Sairanen
Location: Tähtikallio, Artjärvi, Finland
Date: 22/23.9.2007 2:00
Instrument: Catadioptric 406/4064 mm
Magnification: 308x	Filter: -
Field: 13'	Seeing: 3
Background sky: 2	NE lim mag: 6.3
Visuality: I	Height: 27°
Weather: +5°C, moist
Description: 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.
Updated: 18.10.2007 19:39
Name: Messier 92	Other name: NGC 6341
RA: 17h 17.1m	DEC: +43° 8'
Constellation: HER
Type: Globular cluster
Magnitude: 6.5
Size: 11.2'
Surface brightness: 11
Classification: IV
Description: vB,vL,eCM,st 12...
Notes: Lord Rosse saw spiral structure
Observer: Iiro Sairanen
Location: Lakasenpelto, Imatra, Finland
Date: 26/27.4.2000 0:10
Instrument: Newton 110/805 mm
Magnification: 96x	Filter: -
Field: 25'	Seeing: 1
Background sky: 3	NE lim mag: 5.5
Visuality: I	Height: 0°
Weather: +6,5°C
Description: Tämä on paljon vaatimattomampi pallomainen kuin eteläpuolella oleva M13, mutta hyvän kelin ansiosta siitäkin erottui kymmeniä yksittäisiä tähtiä. Joukon ydin oli yllättävän kirkas, pienikokoinen ja tiivis. Ytimen ympäriltä alkoi erottua yksittäisiä tähtiä sitten enemmänkin. Joukon itälaidalta erottui kolme-viisi huomattavasti kirkkaampaa tähteä. Havaintooni käytin 25mm Plössl okulaaria ja 3x-Barlow linssiä, jolloin suurennus on 96x. M92 oli huomattavasti helpompi piirtää kuin M13.
Updated: 18.2.2003 8:42