NGC 4452
| Galaxie NGC 4452 | |
|---|---|
 | |
| Aufnahme des Hubble-Weltraumteleskops | |
| AladinLite | |
| Sternbild | Jungfrau |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 12h 28m 43,3s[1] |
| Deklination | +11° 45′ 18″[1] |
| Erscheinungsbild | |
| Morphologischer Typ | S0(9)[1] |
| Helligkeit (visuell) | 11,9 mag[2] |
| Helligkeit (B-Band) | 12,9 mag[2] |
| Winkelausdehnung | 2.70 × 0.6[2] |
| Positionswinkel | 32°[2] |
| Flächenhelligkeit | 12,3 mag/arcmin²[2] |
| Physikalische Daten | |
| Zugehörigkeit | Virgo-Cluster (??)[1] |
| Rotverschiebung | 0.000627 ± 0.000017[1] |
| Radialgeschwindigkeit | (188 ± 5) km/s[1] |
| Hubbledistanz vrad / H0 | (6 ± 0) · 106 Lj (1,80 ± 0,15) Mpc [1] |
| Geschichte | |
| Entdeckung | William Herschel |
| Entdeckungsdatum | 15. März 1784 |
| Katalogbezeichnungen | |
| NGC 4452 • UGC 7601 • PGC 41060 • CGCG 070-112 • MCG +02-32-080 • 2MASX J12284362+1145261 • VCC 1125 • GC 3008 • H I 23 • GALEXASC J122843.30+114518.7 • LDCE 904 NED135 • EVCC 710 • VPC 613 | |
NGC 4452 ist eine linsenförmige Zwerggalaxie vom Hubble-Typ S0 im Sternbild Jungfrau auf der Ekliptik. Sie ist schätzungsweise 6 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 5.000 Lichtjahren. Unter der Katalognummer VCC 1125 ist sie als Mitglied des Virgo-Galaxienhaufens gelistet. Die Radialgeschwindigkeit der Galaxie von 165 km/s ist im Vergleich zu den eigentümlichen Geschwindigkeiten (Nicht-Hubble-Expansion) zu gering, um die Entfernung abzuschätzen. Rotverschiebungsunabhängige Entfernungsschätzungen schätzen die Entfernung auf etwa 50 bis 55 Millionen Lichtjahren.
Im selben Himmelsareal befinden sich u. a. die Galaxien IC 794, IC 3381, IC 3413, IC 3418.
Das Objekt wurde am 15. März 1784 von William Herschel mit seinem 47-cm-Spiegelteleskop entdeckt.[3][4]
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The NASA/ESA Hubble Space Telescope has imaged a striking galaxy called NGC 4452, which appears to lie exactly edge-on as seen from Earth. The result is an extraordinary picture of billions of stars observed from an unusual angle. The bright nucleus can be seen at the centre, along with the very thin disc that looks like a straight line from our unusual viewing position. To complete the picture, a hazy halo of stars on the periphery of the galaxy makes it seem to glow.
NGC 4452 was first seen by William Herschel in 1784 with his 47 cm telescope in England. He described the object as a bright nebula, small and very much elongated. The new Hubble image shows just how elongated this unusual object really is.
Galaxies are like star cities, and typically contain many billions of stars. The American astronomer Edwin Hubble, after whom the Hubble Space Telescope is named, was the first person to prove that there are other galaxies beyond our own by measuring their distances. This work, done in the 1920s, forever changed our view of the Universe.
Galaxies also belong to collections that are called galaxy clusters. NGC 4452 is part of the Virgo Cluster, so-called because many of its members appear in the constellation of Virgo (the Maiden). This enormous grouping is approximately 60 million light-years distant and contains around 2000 galaxies.
It is thought that the Local Group of galaxies, to which our own Milky Way belongs, is on the fringes of the Virgo Cluster, and at some point in the far future the Local Group may be pulled slowly into the Virgo Cluster by the force of gravity. Large numbers of much more remote, faint galaxies, far beyond NGC 4452 and the Virgo Cluster, appear in the background of this image.
This picture of NGC 4452 was created from images taken using the Wide Field Channel on Hubble’s Advanced Camera for Surveys. This picture was made from images through blue (F475W, coloured blue) and near-infrared (F850LP, coloured red) filters. The exposures times were 750 s and 1210 s respectively. The field of view extends over 2.6 arcminutes.