Skip to content
EntityQ580345· pop 37· linked from 524 articles

Also known as New General Catalogue 2841

spiral galaxy in the constellation Ursa Major

Key facts

Constellation
Ursa Major
Right ascension
09 22 02.655
Declination
+50 ° 58 ′ 35.32 ″
Heliocentric radial velocity
638 km/s
Distance
46.0 ± 4.9 Mly (14.1 ± 1.5 Mpc )
Type
SAa
Mass
7 × 10 M ☉ M ☉
Size
~150,000 ly (~46 kpc )
Apparent size v
8.1 ′ × 3.5 ′
Notable features
Flocculent galaxy with LINER nucleus

via Wikipedia infobox

Wikidata facts

Constellation
Ursa Major
Distance from Earth
14.1
Image
Spiral Galaxy NGC 2841.jpg
Show 12 more facts
discoverer or inventor
William Herschel
galaxy morphological type
SAa
catalog code
[VDD93] 91
time of discovery or invention
1788-03-09
apparent magnitude
9.099
Commons category
NGC 2841
Commons gallery
NGC 2841
redshift
0.00190
right ascension
140.5110625
declination
50.9764778
radial velocity
569
epoch
J2000.0
Sources (2)

via Wikidata · CC0

~3 min read

Encyclopedic overview

NGC 2841 is an unbarred spiral galaxy in the northern circumpolar constellation of Ursa Major. It was discovered on 9 March, 1788 by German-born astronomer William Herschel. J. L. E. Dreyer, the author of the New General Catalogue, described it as, "very bright, large, very much extended 151°, very suddenly much brighter middle equal to 10th magnitude star". Initially thought to be about 30 million light-years distant, a 2001 Hubble Space Telescope survey of the galaxy's Cepheid variables determined its distance to be approximately 14.1 megaparsecs, or 46 million light-years. The optical size of the galaxy is 8.1′ × 3.5′.

This is the prototype for the flocculent spiral galaxy, a type of spiral galaxy whose arms are patchy and discontinuous. The morphological class is SAa, indicating a spiral galaxy with no central bar and very tightly-wound arms. There is no grand design structure visible in the optical band, although some inner spiral arms can be seen in the near infrared. It is inclined by an angle of 68° to the line of sight from the Earth, with the major axis aligned along a position angle of 148°.

Excerpted from Wikipedia’s “NGC 2841” article, available under the CC BY-SA 4.0 licence.