NGC 3090

Observation Notes:

After hunting for a variety of challenging objects in the constellation Sextans and coming up empty-handed on several counts, I finally settled upon this diminutive puff. NGC 3090 showed up about 30 arcseconds from a prominent star. This galaxy resides in the midst of a cluster of fainter galaxies. I was not able to see any of these other companions with my 6 inch (15 cm) scope, but a check of the satellite loop when I got home revealed a stream of thin cirrus breezing overhead during the observation. On another, clearer occasion, I’d like to re-address this group and see if any other members are discernible. Have a look at these sketches of the group by Bill Ferris with his 18″ Obsession and Eric Graff with his 6″ f/6 Newtonian. Thanks Eric for suggesting the challenging targets in this section of sky.

Object Information

NGC 3090 was discovered in 1865 by Albert Marth. The galaxy is also catalogued as MCG+00-26-005, GC 5516, CGCG 008.016, IRAS 09579-0243, PGC 28945.

Subject NGC 3090
Classification Elliptical Galaxy
Position* Sextans [RA: 10:00:30.3 / Dec: -02:58:06]
Size* 1.7′ x 1.4′
Brightness* 12.6 vMag. / 13.5 bMag
Date/Time March 15, 2007 – 10:45 PM
(March 16, 2007 – 05:45 UT)
Observing Loc. Cinder Hills Overlook, Sunset Crater National Monument, AZ
Instrument Orion SVP 6LT Reflector (150 mm dia./1200 mm F/L)
Eyepieces/Mag. 10 mm (120X)
Conditions Mostly clear, calm
Seeing 4/10
Transparency ~ Mag 6 NELM
*Sources NGC/IC Project

*Based on published data.