NGC 4469

NGC 4469
	SDSS image of NGC 4469
Observation data (J2000 epoch)
Constellation	Virgo
Right ascension	12h 29m 28.0s [1]
Declination	08° 45′ 00″ [1]
Redshift	0.001798/539 km/s [1]
Distance	54,610,000 ly [1]
Group or cluster	Virgo Cluster
Apparent magnitude (V)	12.0 [1]
Characteristics
Type	SB(s)0/a, LINER [1]
Size	~60,380 ly (estimated) [1]
Apparent size (V)	2.50 x 1.04 [1]
Other designations
	PGC 41164, UGC 7622, VCC 1190 [1]
	See also: Galaxy, List of galaxies

Last updated April 26, 2019

NGC 4469 is a nearly edge-on spiral galaxy ^[2] located about 55 million light-years away^[3] in the constellation of Virgo.^[4] It is also classified as a LINER galaxy.^[3] NGC 4469 was discovered by astronomer William Herschel on April 15, 1784.^[5] It is a member of the Virgo Cluster.^[6]

Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, form part of the Hubble sequence. Most spiral galaxies consist of a flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as the bulge. These are often surrounded by a much fainter halo of stars, many of which reside in globular clusters.

Light-year unit of length that light travels within one Earthyear; equal to just under 10 trillion kilometres (or about 6 trillion miles)

The light-year is a unit of length used to express astronomical distances and measures about 9.46 trillion kilometres (9.46 x 10¹² km) or 5.88 trillion miles (5.88 x 10¹² mi). As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days). Because it includes the word "year", the term light-year is sometimes misinterpreted as a unit of time.

A constellation is a group of stars that forms an imaginary outline or pattern on the celestial sphere, typically representing an animal, mythological person or creature, a god, or an inanimate object.

Physical characteristics

NGC 4469 has an X or peanut-shaped bulge, betraying the presence of a bar which generates such structures.^[2]^[7] NGC 4469 may also have an axisymmetric structure. ^[8]

In astronomy, a bulge is a tightly packed group of stars within a larger formation. The term almost exclusively refers to the central group of stars found in most spiral galaxies. Bulges were historically thought to be elliptical galaxies that happened to have a disk of stars around them, but high-resolution images using the Hubble Space Telescope have revealed that many bulges lie at the heart of a spiral galaxy. It is now thought that there are at least two types of bulges: bulges that are like ellipticals and bulges that are like spiral galaxies.

Dust Lanes

NGC 4469 has dust lanes that cross the Earth's line of sight.^[6]

Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago. Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite. Earth revolves around the Sun in 365.26 days, a period known as an Earth year. During this time, Earth rotates about its axis about 366.26 times.

External links

NGC 4469 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

Related Research Articles

NGC 4477 is a barred lenticular galaxy located about 55 million light-years away in the constellation of Coma Berenices. NGC 4477 is classified as a type 2 seyfert galaxy. The galaxy was discovered by astronomer William Herschel on April 8, 1784. NGC 4477 is a member of Markarian's Chain which forms part of the larger Virgo Cluster.

NGC 4461 is a lenticular galaxy located about 50 million light-years away in the constellation of Virgo. It was discovered by astronomer William Herschel on April 12, 1784. NGC 4461 is a member of Markarian's Chain which is part of the Virgo Cluster.

NGC 4454 is a barred spiral galaxy located about 123 million light-years away in the constellation of Virgo. NGC 4454 was discovered by astronomer William Herschel on April 17, 1784.

NGC 4466 is an edge-on spiral galaxy located about 50 million light-years away in the constellation of Virgo. NGC 4466 was discovered by astronomer Bindon Stoney on February 26, 1851. The galaxy is a member of the Virgo Cluster.

NGC 4608 is a barred lenticular galaxy located about 56 million light-years away in the constellation of Virgo. The galaxy was discovered by astronomer William Herschel on March 15, 1784. It is a member of the Virgo Cluster.

NGC 4623 is an edge-on lenticular or elliptical galaxy located about 54 million light-years away in the constellation of Virgo. NGC 4623 is classified as an E7, a rare type of "late" elliptical that represents the first stage of transition into a lenticular galaxy. NGC 4623 was discovered by astronomer William Herschel on April 13, 1784. NGC 4623 is a member of the Virgo Cluster.

NGC 4468 is a dwarf elliptical galaxy located about 55 million light-years away in the constellation of Coma Berenices. The galaxy was discovered by astronomer William Herschel on January 14, 1787. It is a member of the Virgo Cluster.

NGC 4429 is a lenticular galaxy located about 55 million light-years away in the constellation of Virgo. NGC 4429 is tilted at an inclination of about 75° which means that the galaxy is tilted almost edge-on as seen from Earth. NGC 4429 was discovered by astronomer William Herschel on March 15, 1784. The galaxy is a member of the Virgo Cluster.

NGC 4689 is a spiral galaxy located about 54 million light-years away in the constellation of Coma Berenices. NGC 4689 is also classified as a LINER galaxy. NGC 4689 is inclined at an angle of about 36° which means that the galaxy is seen almost face-on to the Earth's line of sight. NGC 4689 was discovered by astronomer William Herschel on April 12, 1784. The galaxy is a member of the Virgo Cluster.

NGC 4440 is a barred spiral galaxy located about 55 million light-years away in the constellation of Virgo. NGC 4440 was discovered by astronomer William Herschel on April 17, 1784. It is a member of the Virgo Cluster.

NGC 4606 is a spiral galaxy located about 55 million light-years away in the constellation of Virgo. NGC 4606 was discovered by astronomer William Herschel on March 15, 1784. It has a disturbed stellar disk suggesting the actions of gravitational interactions. NGC 4607 may be a possible companion of NGC 4606. However, their redshifts differ by about 600 km/s, making it unlikely that they are a gravitationally bound pair. NGC 4606 is a member of the Virgo Cluster.

NGC 4476 is a lenticular galaxy located about 55 million light-years away in the constellation Virgo. NGC 4476 was discovered by astronomer William Herschel on April 12, 1784. The galaxy is a member of the Virgo Cluster.

NGC 4478 is a elliptical galaxy located about 50 million light-years away in the constellation Virgo. NGC 4478 was discovered by astronomer William Herschel on April 12, 1784. NGC 4478 is a member of the Virgo Cluster.

NGC 4492 is a spiral galaxy located about 90 million light-years away in the constellation Virgo. NGC 4492 was discovered by astronomer William Herschel on December 28, 1785. It was rediscovered by astronomer Arnold Schwassmann on January 23, 1900 and was listed as IC 3438. NGC 4492 lies in the direction of the Virgo Cluster. However, it is not considered to be a member of that cluster.

NGC 4498 is a barred spiral galaxy located about 50 million light-years away in the constellation Coma Berenices. NGC 4498 was discovered by astronomer William Herschel on March 21, 1784. NGC 4498 is a member of the Virgo Cluster.

NGC 4506 is a spiral galaxy located around 50 million light-years away in the constellation Coma Berenices. It is classified as peculiar due to the presence of dust that surrounds its nucleus. NGC 4506 was discovered by astronomer William Herschel on January 14, 1787. It is a member of the Virgo Cluster.

NGC 4586 is a spiral galaxy located about 50 million light-years away in the constellation Virgo. The galaxy was discovered by astronomer William Herschel on February 2, 1786. Although listed in the Virgo Cluster Catalog, NGC 4586 is considered to be a member of the Virgo II Groups which form a southern extension of the Virgo cluster. NGC 4586 is currently in the process of infalling into the Virgo Cluster and is predicted to enter the cluster in about 500 million years.

NGC 4595 is a spiral galaxy located about 42 million light-years away in the constellation Coma Berenices. NGC 4595 was discovered by astronomer William Herschel on January 14, 1787. NGC 4595 is a member of the Virgo Cluster.

NGC 4596 is a barred lenticular galaxy located about 55 million light-years away in the constellation Virgo. NGC 4596 was discovered by astronomer William Herschel on March 15, 1784. NGC 4596 is a member of the Virgo Cluster and has an inclination of about 38°.

NGC 4638 is an edge-on lenticular galaxy located about 50 million light-years away in the constellation Virgo. NGC 4638 was discovered by astronomer William Herschel on March 15, 1784. The galaxy is a member of the Virgo Cluster.

References

1 2 3 4 5 6 7 8 9 "NASA/IPAC Extragalactic Database". Results for NGC 4469. Retrieved 2017-10-02.
1 2 Bureau, M.; Aronica, G.; Athanassoula, E.; Dettmar, R.-J.; Bosma, A.; Freeman, K. C. (24 April 2006). "K-band observations of boxy bulges – I. Morphology and surface brightness profiles". Monthly Notices of the Royal Astronomical Society. 370 (2): 753–772. arXiv: astro-ph/0606056 . Bibcode:2006MNRAS.370..753B. doi:10.1111/j.1365-2966.2006.10471.x.
1 2 "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-10-03.
↑ Rojas, Sebastián García. "Galaxy NGC 4469 - Galaxy in Virgo Constellation · Deep Sky Objects Browser". DSO Browser. Retrieved 2017-10-03.
↑ "New General Catalog Objects: NGC 4450 - 4499". cseligman.com. Retrieved 2017-10-03.
1 2 "Detailed Object Classifications". ned.ipac.caltech.edu. Retrieved 2017-10-03.
↑ Bogdan C. Ciambur; Alister W. Graham (2016), Quantifying the (X/peanut)-shaped structure in edge-on disc galaxies: length, strength, and nested peanuts
↑ BUREAU, M.; FREEMAN, K. C. (30 March 1999). "THE NATURE OF BOXY/PEANUT-SHAPED BULGES IN SPIRAL GALAXIES". The Astronomical Journal. 118 (1): 126–138. arXiv: astro-ph/9904015 . Bibcode:1999AJ....118..126B. doi:10.1086/300922.

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[ned-1] 1 2 3 4 5 6 7 8 9 "NASA/IPAC Extragalactic Database". Results for NGC 4469. Retrieved 2017-10-02.

[:0-2] 1 2 Bureau, M.; Aronica, G.; Athanassoula, E.; Dettmar, R.-J.; Bosma, A.; Freeman, K. C. (24 April 2006). "K-band observations of boxy bulges – I. Morphology and surface brightness profiles". Monthly Notices of the Royal Astronomical Society. 370 (2): 753–772. arXiv: astro-ph/0606056 . Bibcode:2006MNRAS.370..753B. doi:10.1111/j.1365-2966.2006.10471.x.

[:2-3] 1 2 "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-10-03.

[4] Rojas, Sebastián García. "Galaxy NGC 4469 - Galaxy in Virgo Constellation · Deep Sky Objects Browser". DSO Browser. Retrieved 2017-10-03.

[5] "New General Catalog Objects: NGC 4450 - 4499". cseligman.com. Retrieved 2017-10-03.

[:1-6] 1 2 "Detailed Object Classifications". ned.ipac.caltech.edu. Retrieved 2017-10-03.

[7] Bogdan C. Ciambur; Alister W. Graham (2016), Quantifying the (X/peanut)-shaped structure in edge-on disc galaxies: length, strength, and nested peanuts

[8] BUREAU, M.; FREEMAN, K. C. (30 March 1999). "THE NATURE OF BOXY/PEANUT-SHAPED BULGES IN SPIRAL GALAXIES". The Astronomical Journal. 118 (1): 126–138. arXiv: astro-ph/9904015 . Bibcode:1999AJ....118..126B. doi:10.1086/300922.