NGC 1439 is an
elliptical galaxy located in constellation of
Eridanus. Situated about 77 million light years away, it is a member of the
Eridanus cluster
The Eridanus Cluster is a galaxy cluster roughly from Earth, containing about 73 main Galaxy, galaxies and about 200 total galaxies. About 30% have Hubble sequence, Hubble classifications of elliptical or S0 and the remaining 70% are spiral o ...
of galaxies, a cluster of about 200 galaxies. It was discovered by
William Herschel on 9 December 1784.
NGC 1439 has a
Hubble classification
The Hubble sequence is a morphological classification scheme for galaxies invented by Edwin Hubble in 1926. It is often colloquially known as the Hubble tuning-fork diagram because the shape in which it is traditionally represented resembles a t ...
of E1, which indicates it is an elliptical galaxy with no extensions. It is moving away from the
Milky Way at a rate of 1,668 km/s. Its size on the night sky is 2.4' x 2.2' which is proportional to its real size of 54 000 ly.
NGC 1439 is an early-type galaxy. Despite their name, early-type galaxies are much older than spiral galaxies, and mostly comprise old, red-colored stars. Very little star formation occurs in these galaxies; the lack of star formation in elliptical galaxies appears to start at the center and then slowly propagates outward.
Most of the galaxies like NGC 1439 are dust poor. However, NGC 1439 contains more dust than usual.
Gallery
NGC 1439 DSS.jpg, DSS image of NGC 1439
NGC 1439 PanS.jpg, NGC 1439 by Pan-STARRS
NGC1439 - hst 10554R850GB475.png, NGC 1439 ( HST)
References
External links
*
{{DEFAULTSORT:NGC 1439
Eridanus (constellation)
Elliptical galaxies
1439
Year 1439 ( MCDXXXIX) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.
Events
January–December
* May 4 – Battle of Grotnik: Władysław III's royal army defeats the Hussite m ...
013738
Eridanus Group