Iiro's DeepSky Sketches

Menu
Name: NGC 4490Other name: UGC 7651
RA: 12h 30.6m DEC: +41° 39'
Constellation: CVN
Type: Galaxy
Magnitude: 9.8
Size: 6.4' x 3.2'
PA: 125°
Surface brightness: 12.9
Classification: SBcd
Description: vB,vL,mE130,r,sf of 2
Notes: H I 198,disrupted,P w NGC 4485 @ 3.5'
Observer: Iiro Sairanen
Location: Härskiänsaari, Ruokolahti, Finland
Date: 26/27.4.2008 0:45
Instrument: Newton 457/2280 mm
Magnification: 326xFilter: -
Field: 15'Seeing: 4
Background sky: 5NE lim mag: 5.3
Visuality: IHeight: 68°
Weather: +0°C, astronomical twilight
Description: Full darkness has gone till next autumn, but NGC 4490 was still a superb galaxy with a 7 mm Nagler. Spiral arms are very open, the northern arm is much longer than southern one. SN2008ax shone as a 14 mag star alongside the southern arm. There is also a faint star in the southern tip.
Updated: 6.9.2008 17:24
Name: NGC 4490+SN2008axOther name: UGC 7651
RA: 12h 30.6m DEC: +41° 39'
Constellation: CVN
Type: Galaxy
Magnitude: 9.8
Size: 6.4' x 3.2'
PA: 125°
Surface brightness: 12.9
Classification: SBcd
Description: vB,vL,mE130,r,sf of 2
Notes: H I 198,disrupted,P w NGC 4485 @ 3.5'
Observer: Iiro Sairanen
Location: NOT (2390 m), La Palma, Spain
Date: 4/5.4.2008 0:20
Instrument: Newton 110/805 mm
Magnification: 115xFilter: -
Field: 43'Seeing: 2
Background sky: 1NE lim mag: 7.2
Visuality: IHeight: 70°
Weather: +4°C, huminidy 40%, wind 10 m/s
Description: SN2008ax appears as a faint star on the SE-side of the core. Galaxy itself is pretty bright and I was able to see a northern spiral arm quite easily.
Updated: 16.6.2008 21:00
Name: NGC 4490Other name: UGC 7651
RA: 12h 30.6m DEC: +41° 39'
Constellation: CVN
Type: Galaxy
Magnitude: 9.8
Size: 6.4' x 3.2'
PA: 125°
Surface brightness: 12.9
Classification: SBcd
Description: vB,vL,mE130,r,sf of 2
Notes: H I 198,disrupted,P w NGC 4485 @ 3.5'
Observer: Iiro Sairanen
Location: Lakasenpelto, Imatra, Finland
Date: 17/18.2.2002 -
Instrument: Newton 406/1830 mm
Magnification: 244xFilter: -
Field: 13'Seeing: 2
Background sky: 3NE lim mag: 5.8
Visuality: -Height: 0°
Weather: windy, +1°C
Description: NGC 4490 on todella näyttävä kohde. Sen spiraalihaarat ovat erotettavissa todella helposti. Ne näyttävät loivalta S-kirjaimen peilikuvalta. Galaksin ydin on diffuusi ja melko suuri. Eteläisen spiraalihaaran itäpuolella erottui heikko kirkastuma. NGC 4485 on pieni 12,3 magnitudin galaksi aivan NGC 4490 vieressä. NGC 4485 näkyi pienenä ellipsin muotoisena sumuna.
Updated: 17.2.2003 13:15