NGC 4858
| Galaxie NGC 4858 | |
|---|---|
 (c) ESA/Hubble, CC BY 4.0 | |
| Die Spiralgalaxie NGC 4858 links neben der elliptischen Galaxie NGC 4860 im Zentrum, aufgenommenen mithilfe des Hubble-Weltraumteleskops. | |
| AladinLite | |
| Sternbild | Haar der Berenike |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 12h 59m 02,0s[1] |
| Deklination | +28° 06′ 57″[1] |
| Erscheinungsbild | |
| Morphologischer Typ | SBb[1] |
| Helligkeit (visuell) | 15,2 mag[2] |
| Helligkeit (B-Band) | 16,0 mag[2] |
| Winkelausdehnung | 0,5′ × 0,4′[2] |
| Positionswinkel | 36°[2] |
| Flächenhelligkeit | 13.3 mag/arcmin²[2] |
| Physikalische Daten | |
| Zugehörigkeit | Abell 1656[1] |
| Rotverschiebung | 0.031410 ± 0.000007[1] |
| Radialgeschwindigkeit | (9416 ±2) km/s[1] |
| Hubbledistanz H0 = 73 km/(s • Mpc) | (421 ± 29) · 106 Lj (129,2 ± 9,0) Mpc [1] |
| Geschichte | |
| Entdeckung | Heinrich d’Arrest |
| Entdeckungsdatum | 21. April 1865 |
| Katalogbezeichnungen | |
| NGC 4858 • PGC 44535 • CGCG 160-213 • MCG +05-31-051 • IRAS 12566+2823 • KUG 1256+283 • 2MASX J12590210+2806559 • GC 5691 • NVSS J125902+280658 | |
NGC 4858 ist eine 15,2 mag helle Balken-Spiralgalaxie mit hoher Sternentstehungsrate vom Hubble-Typ SBb im Sternbild Haar der Berenike am Nordsternhimmel. Sie ist schätzungsweise 421 Millionen Lichtjahre von der Milchstraße entfernt, hat einen Durchmesser von etwa 60.000 Lj und ist Mitglied des Coma-Galaxienhaufens.
Im selben Himmelsareal befinden sich u. a. die Galaxien NGC 4860, NGC 4865, IC 3943, IC 3955.
Das Objekt wurde am 21. April 1865 von Heinrich Louis d’Arrest entdeckt.[3]
Weblinks
Commons: NGC 4858 – Sammlung von Bildern, Videos und Audiodateien
- NGC 4858. DSO Browser, abgerufen am 18. Februar 2015 (englisch).
- NGC 4858. SIMBAD, abgerufen am 18. Februar 2015 (englisch).
- astronews.com: Bild des Tages 19. September 2018
- Auke Slotegraaf: NGC 4858. Deep Sky Observer's Companion, abgerufen am 18. Februar 2015 (englisch).
- Knots and bursts
Einzelnachweise
Auf dieser Seite verwendete Medien
Knots and bursts NGC 4860 and NGC 4858.jpg
(c) ESA/Hubble, CC BY 4.0
In the northern constellation of Coma Berenices (Berenice's Hair) lies the impressive Coma Cluster — a structure of over a thousand galaxies bound together by gravity. Many of these galaxies are elliptical types, as is the brighter of the two galaxies dominating this image: NGC 4860 (centre). However, the outskirts of the cluster also host younger spiral galaxies that proudly display their swirling arms. Again, this image shows a wonderful example of such a galaxy in the shape of the beautiful NGC 4858, which can be seen to the left of its bright neighbour and which stands out on account of its unusual, tangled, fiery appearance. NGC 4858 is special. Rather than being a simple spiral, it is something called a “galaxy aggregate”, which is, just as the name suggests, a central galaxy surrounded by a handful of luminous knots of material that seem to stem from it, extending and tearing away and adding to or altering its overall structure. It is also experiencing an extremely high rate of star formation, possibly triggered by an earlier interaction with another galaxy. As we see it, NGC 4858 is forming stars so frantically that it will use up all of its gas long before it reaches the end of its life. The colour of its bright knots indicates that they are formed of hydrogen, which glows in various shades of bright red as it is energised by the many young, hot stars lurking within. This scene was captured by the NASA/ESA Hubble Space Telescope’s Wide Field Camera 3 (WFC3), a powerful camera designed to explore the evolution of stars and galaxies in the early Universe.
(c) ESA/Hubble, CC BY 4.0
In the northern constellation of Coma Berenices (Berenice's Hair) lies the impressive Coma Cluster — a structure of over a thousand galaxies bound together by gravity. Many of these galaxies are elliptical types, as is the brighter of the two galaxies dominating this image: NGC 4860 (centre). However, the outskirts of the cluster also host younger spiral galaxies that proudly display their swirling arms. Again, this image shows a wonderful example of such a galaxy in the shape of the beautiful NGC 4858, which can be seen to the left of its bright neighbour and which stands out on account of its unusual, tangled, fiery appearance. NGC 4858 is special. Rather than being a simple spiral, it is something called a “galaxy aggregate”, which is, just as the name suggests, a central galaxy surrounded by a handful of luminous knots of material that seem to stem from it, extending and tearing away and adding to or altering its overall structure. It is also experiencing an extremely high rate of star formation, possibly triggered by an earlier interaction with another galaxy. As we see it, NGC 4858 is forming stars so frantically that it will use up all of its gas long before it reaches the end of its life. The colour of its bright knots indicates that they are formed of hydrogen, which glows in various shades of bright red as it is energised by the many young, hot stars lurking within. This scene was captured by the NASA/ESA Hubble Space Telescope’s Wide Field Camera 3 (WFC3), a powerful camera designed to explore the evolution of stars and galaxies in the early Universe.