... М32 < М33 > М34 ...

Spiral galaxy M33

Spiral galaxy M33 or Triangulum is in the constellation Triangulum (Tri).

Equatorial coordinates (epoch J2000):
Ra (α):01^h33.9^m, Dec (δ):+30° 39'

Visual magnitude: 5,7^m - this object can be seen with the naked eye on a black sky, in the absence of illumination from street lighting.
Distance from the galaxy M33 to the Sun is 2,74*10⁶ light years
Angular size: 71'×42'
Class: Sc
External dimensions the galaxy M33 are about 60000 light years.
Number of stars: 40x10⁹
Estimated weight the galaxy: 10-40x10⁹ suns
The mass of the central object (black hole): 3-10x10³ suns

Discoverer: Giovanni Battista Hodierna, before 1654 year.

The designation M33 in other catalogs: NGC 598

Optimum magnification for a telescope with observations of M33, depending on the aperture of the telescope (D), is about D/6-D/4. 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 M33 is November. At this time, the object is at midnight near its highest point in the sky, that is, it is less affected by light from the lanterns and atmospheric distortions.

Мessier 32

Мessier 34

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