astro-map.com

 Русский en en en en en en en en en en en en
... М46 < М47 > М48 ...

Open star cluster M47

Open star cluster M47 is in the constellation Puppis (Pup).

M47

Equatorial coordinates (epoch J2000):
Ra 07h 36.6m, Dec -14° 30'

Visual magnitude: 4,5m - this object can be seen with the naked eye on a black sky, in the absence of illumination from street lighting.
Distance to the star clusters M47 to the Sun is 1600 light years
Angular size: 30'
Class: II,3,m
External dimensions the star clusters M47 are about 14 light years.
Number of stars: 117
Age of the object M47 is 30—100x106 years

Discoverer: Giovanni Battista Hodierna, before 1654 year.

The designation M47 in other catalogs: NGC 2422

Optimum magnification for a telescope with observations of M47, 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 M47 is .



Nikolay Kurdyapin, astro-map.com  
Liked?   or tell your friends:



© 2018, astro-map.com
At a reprint of materials from this site link to the astro-map.com obligatory.