NGC4495 is a
spiral galaxy
Spiral galaxies form a galaxy morphological classification, class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae'' in the
constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The first constellati ...
of
Coma Berenices
Coma Berenices is an ancient asterism in the northern sky, which has been defined as one of the 88 modern constellations. It is in the direction of the fourth galactic quadrant, between Leo and Boötes, and it is visible in both hemispher ...
. Its velocity with respect to the
cosmic microwave background
The cosmic microwave background (CMB, CMBR), or relic radiation, is microwave radiation that fills all space in the observable universe. With a standard optical telescope, the background space between stars and galaxies is almost completely dar ...
is 4850 ± 20km/s, which corresponds to a
Hubble distance
Hubble's law, also known as the Hubble–Lemaître law, is the observation in physical cosmology that galaxies are moving away from Earth at speeds proportional to their distance. In other words, the farther a galaxy is from the Earth, the faster ...
of . Additionally, 31 ''non-redshift'' measurements give a distance of . It was discovered by German-British astronomer
William Herschel
Frederick William Herschel ( ; ; 15 November 1738 – 25 August 1822) was a German-British astronomer and composer. He frequently collaborated with his younger sister and fellow astronomer Caroline Herschel. Born in the Electorate of Hanover ...
on 13 March 1785.
According to the
SIMBAD
SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data) is an astronomy, astronomical database of objects beyond the Solar System. It is maintained by the Centre de données astronomiques de Strasbourg (CDS), Fr ...
database, NGC4495 is a
LINER
Liner or LINER may refer to:
Line drawing
* Eye liner, a type of makeup
* Marker pen, a porous-tip pen with its own ink source
* Multiple lining tool used in engraving
* A sable brush used by coach painters
Linings
* Acoustic liner, a no ...
galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.
Supernovae
Three
supernova
A supernova (: supernovae or supernovas) is a powerful and luminous explosion of a star. A supernova occurs during the last stellar evolution, evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion ...
e have been observed in NGC 4495:
* SN1994S (
TypeIa, mag. 14.5) was discovered by Larry Mitchell on 4 June 1994.
* SN2010lo (type unknown, mag. 17.3) was discovered by the
La Sagra Sky Survey on 15 December 2010.
* SN2011ca (
TypeIc, mag. 17.2) was discovered by Fabrizio Ciabattari and E. Mazzoni on 26 April 2011.
See also
*
List of NGC objects (4001–5000)
This is a list of NGC objects 4001–5000 from the New General Catalogue (NGC). The astronomical catalogue is composed mainly of star clusters, nebulae, and galaxies. Other objects in the catalogue can be found in the other subpages of the list of ...
References
External links
*
{{NGC45
4495
041438
+05-30-012
07663
12289+2924
Coma Berenices
17850313
Discoveries by William Herschel
Spiral galaxies
LINER galaxies