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... М89 < М90 > М91 ...

Spiral galaxy M90

Spiral galaxy M90 is in the constellation Virgo (Vir).

M90

Equatorial coordinates (epoch J2000):
Ra 12h 36.8m, Dec +13° 10'

Visual magnitude: 9,5m
Distance to the galaxy M90 to the Sun is 30,7*106 light years
Angular size: 10'×4'
Class: Sb (SBab)
External dimensions the galaxy M90 are about 85000 light years.

Discoverer: Charles Messier, 18.03.1781 year.

The designation M90 in other catalogs: NGC 4569

Optimum magnification for a telescope with observations of M90, depending on the aperture of the telescope (D), is about D/6-D/3. Higher magnifications of course add details, but lead to a strong drop in the brightness of the image, making it difficult to observe.
The best month for observing M90 is May.
For observers in the northern latitudes: the night sky in May is no longer very dark, so try also to observe M90 in April.
Of course, in April the object is at midnight not at its highest point, which provides the least exposure and atmospheric distortion. But, the darkness of the April sky greatly increases the contrast. The farther south the location of your observation is located, the darker the summer sky will be.



Nikolay Kurdyapin, astro-map.com  
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