NGC 1439: Difference between revisions
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|h_radial_v = 1668 ± 8 km/s |
|h_radial_v = 1668 ± 8 km/s |
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|appmag_v = 11.4<ref name="nightsky" /> |
|appmag_v = 11.4<ref name="nightsky" /> |
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|size_v = 2.4 |
|size_v = 2.4{{prime}} × 2.2{{prime}}<ref name="nightsky" /> |
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|constellation name = [[Eridanus (constellation)|Eridanus]] |
|constellation name = [[Eridanus (constellation)|Eridanus]] |
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|notes= |
|notes= |
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'''NGC 1439''' is an [[elliptical galaxy]] located in constellation of [[Eridanus (constellation)|Eridanus]]. Situated about 77 million light years away, it is a member of the [[Eridanus cluster]] of galaxies, a cluster of about 200 galaxies. It was discovered by [[William Herschel]] on 9 December 1784. |
'''NGC 1439''' is an [[elliptical galaxy]] located in constellation of [[Eridanus (constellation)|Eridanus]]. Situated about 77 million light years away, it is a member of the [[Eridanus cluster]] of galaxies, a cluster of about 200 galaxies. It was discovered by [[William Herschel]] on 9 December 1784. |
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NGC 1439 has a [[Hubble classification]] of E1, which indicates it is an elliptical galaxy with no extensions. It is moving |
NGC 1439 has a [[Hubble classification]] 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. |
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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.<ref>{{cite web|url=http://www.space.com/29123-ancient-galaxies-die-inside-out.html|website=space.com|title=Colossal Ancient Galaxies Die from the Inside Out|author1=Howell, Elizabeth|date=2015|access-date=5 March 2017}}</ref> |
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.<ref>{{cite web|url=http://www.space.com/29123-ancient-galaxies-die-inside-out.html|website=space.com|title=Colossal Ancient Galaxies Die from the Inside Out|author1=Howell, Elizabeth|date=2015|access-date=5 March 2017}}</ref> |
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Most of the galaxies like NGC 1439 are poor |
Most of the galaxies like NGC 1439 are dust poor. However, NGC 1439 contains more dust than usual.<ref>{{cite journal|doi=10.1086/301440|title=The Central Gas Systems of Early-Type Galaxies Traced by Dust Features, Based on the ''Hubble Space Telescope'' WFPC2 Archival Images|year=2000|last1=Tomita|first1=Akihiko|last2=Aoki|first2=Kentaro|last3=Watanabe|first3=Masaru|last4=Takata|first4=Tadafumi|last5=Ichikawa|first5=Shin-Ichi|journal=The Astronomical Journal|volume=120|issue=1 |pages=123–130|arxiv=astro-ph/0003431 |s2cid=9684945|bibcode=2000AJ....120..123T|doi-access=free}}</ref> |
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== Gallery == |
== Gallery == |
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[[Category:NGC objects|1439]] |
[[Category:NGC objects|1439]] |
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[[Category:Principal Galaxies Catalogue objects|013738]] |
[[Category:Principal Galaxies Catalogue objects|013738]] |
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[[Category:Eridanus Group]] |
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Latest revision as of 23:49, 6 July 2024
| NGC 1439 | |
|---|---|
 Hubble Space Telescope image of NGC 1439 | |
| Observation data (J2000 epoch) | |
| Constellation | Eridanus |
| Right ascension | 03h 44.498m [1] |
| Declination | −21° 55′[1] |
| Heliocentric radial velocity | 1668 ± 8 km/s |
| Distance | 23.5 Mpc (76.6 Mly) |
| Apparent magnitude (V) | 11.4[1] |
| Characteristics | |
| Type | E1[1] |
| Apparent size (V) | 2.4′ × 2.2′[1] |
| Other designations | |
| MCG -04-09-056, PGC 13738[2] | |
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 of galaxies, a cluster of about 200 galaxies. It was discovered by William Herschel on 9 December 1784.
NGC 1439 has a Hubble classification 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.[3]
Most of the galaxies like NGC 1439 are dust poor. However, NGC 1439 contains more dust than usual.[4]
Gallery
[edit]-
DSS image of NGC 1439 -
NGC 1439 by Pan-STARRS -
NGC 1439 (HST)
References
[edit]- ^ a b c d e Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 978-0-00-717223-8.
- ^ "NGC 1439". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-19.
- ^ Howell, Elizabeth (2015). "Colossal Ancient Galaxies Die from the Inside Out". space.com. Retrieved 5 March 2017.
- ^ Tomita, Akihiko; Aoki, Kentaro; Watanabe, Masaru; Takata, Tadafumi; Ichikawa, Shin-Ichi (2000). "The Central Gas Systems of Early-Type Galaxies Traced by Dust Features, Based on the Hubble Space Telescope WFPC2 Archival Images". The Astronomical Journal. 120 (1): 123–130. arXiv:astro-ph/0003431. Bibcode:2000AJ....120..123T. doi:10.1086/301440. S2CID 9684945.
External links
[edit]
Media related to NGC 1439 at Wikimedia Commons
