Messier 90 or M90 (also designated NGC 4569) is a spiral galaxy in the constellation Virgo. It has an apparent visual magnitude of 9.5 and its angular diameter is 9.5x4.5 arc-minutes. M90 lies at an estimated distance of 60 million light years. The Equinox 2000 coordinates are RA= 12h 36.8m, Dec= +13° 10´ which makes M90 best seen during the spring. The Messier Spring Star Chart shows the position of all Messier objects visible during that season.
This spiral galaxy was discovered by Messier in 1781. It is one of the larger, brighter spiral galaxies of the Virgo Cluster. According to Stoyan et al. (2010), the distance of M90 is 30.7 million light years and its diameter is 85,000 light years.
Messier's Description of M90
March 18, 1781
`Nebula without star, in Virgo: its light is as faint as the preceding, No. 89.'
- Object: M90
- Other Names: NGC 4569
- Object Type: spiral galaxy
- Object Data: Apparent Magnitude = 9.5, Angular Size = 9.5x4.5 arc-minutes
- Object Position (Equinox 2000): RA= 12h 36.8m, Dec= +13° 10´, Constellation = Virgo
- Date/Time: 2011 Apr 23 at 04:52 UTC
- Location: Bifrost Astronomical Observatory, Portal, AZ
- Mount: Astro-Physics 1200GTO
- Telescope: Takahashi Epsilon 180 Hyperbolic Astrograph
- Camera: Canon EOS 550D (Rebel T2i) (modified with a Baader UV/IR filter)
- Field of View: 1.70° x 2.56° at 1.7 arc-sec/pixel (web version: 10.0 arc-sec/pixel)
- Exposure: 4 x 300s, f/2.8, ISO 800
- File Name: M89M90M87-01w.jpg
- Processing (Adobe Camera Raw): Graduated Filter, Vignetting Correction, Noise Reduction, White Balance, Curves
- Processing (Photoshop CS5): Average Images, Curves, Noise Reduction
- Original Image Size: 3454 × 5179 pixels (17.9 MP); 11.5" x 17.3" @ 300 dpi
- Rights: Copyright 2011 by Fred Espenak. All Rights Reserved. See: Image Licensing.