Messier 98
| Galaxie Messier 98 | |
|---|---|
 | |
| Aufnahme der Spiralgalaxie Messier 98 mithilfe des New Technology Telescope | |
| AladinLite | |
| Sternbild | Haar der Berenike |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 12h 13m 48,3s[1] |
| Deklination | +14° 54′ 01″[1] |
| Erscheinungsbild | |
| Morphologischer Typ | SAB(s)ab / HII / Sy[1] |
| Helligkeit (visuell) | 10,1 mag[2] |
| Helligkeit (B-Band) | 10,9 mag[2] |
| Winkelausdehnung | 9,8′ × 2,8′[2] |
| Positionswinkel | 155°[2] |
| Inklination | 83° |
| Flächenhelligkeit | 13,5 mag/arcmin²[2] |
| Physikalische Daten | |
| Zugehörigkeit | Virgo-Galaxienhaufen[1] |
| Rotverschiebung | −0.000474 ± 0.000013[1] |
| Radialgeschwindigkeit | −(142 ± 4) km/s[1] |
| Hubbledistanz H0 = 73 km/(s • Mpc) | (46 ± 9) · 106 Lj (14 ± 2,9) Mpc [1] |
| Durchmesser | 150.000 Lj |
| Geschichte | |
| Entdeckung | Pierre Méchain |
| Entdeckungsdatum | 15. März 1781 |
| Katalogbezeichnungen | |
| M 98 • NGC 4192 • UGC 7231 • PGC 39028 • CGCG 098-108 • MCG +03-31-079 • IRAS 12112+1510 • VCC 92 • GC 2786 • h 1132 • | |
Messier 98 (auch als NGC 4192 bezeichnet) ist eine Spiralgalaxie vom Hubble-Typ SABab im Sternbild Haar der Berenike, welche etwa 46 Millionen Lichtjahre von der Milchstraße entfernt.
M98 ist eine Galaxie vom Hubble-Typ Sb, die wir beinahe von der Seite sehen. Sie ist rund 50 Millionen Lichtjahre von der Erde entfernt, liegt am nördlichen Rand des Virgo-Galaxienhaufens und gehört zu den für Amateure schwerer zu findenden Objekten des Messier-Katalogs. Man schätzt, dass Messier 98 etwa eine Billion Sterne enthält.[3]
Entdeckung
Die Galaxie Messier 98 wurde am 15. März 1781 von dem französischen Astronomen Pierre Méchain entdeckt.[4]
Detail-Aufnahme mithilfe des Hubble-Weltraumteleskops
Literatur
- König, Michael & Binnewies, Stefan (2019): Bildatlas der Galaxien: Die Astrophysik hinter den Astrofotografien, Stuttgart: Kosmos, S. 144
Weblinks
- astronews.com: Bild des Tages 6. September 2016
- Spektrum.de: Amateurfotos [1]
- Trillions of stars (englisch)
Einzelnachweise
- ↑ a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
- ↑ a b c d e SEDS: NGC 4192
- ↑ ESO: Warum so blau?
- ↑ Seligman
Auf dieser Seite verwendete Medien
Autor/Urheber:
diverse
, Lizenz: CC-by 3.0Bildtafel der 110 Messier-Objekte.
Autor/Urheber: Credit: ESO / Acknowledgements: Flickr user jbarring, Lizenz: CC BY 4.0
Why So Blue?
The colour blue has many associations — coldness, sadness, serenity. However, the colour holds a completely different meaning for astronomers, as demonstrated by the edge-on spiral galaxy Messier 98.
Messier 98, also known as NGC 4192, is located approximately 50 million light-years away in the constellation of Coma Berenices (Berenice's Hair). In this spectacular image from ESO’s New Technology Telescope (NTT), the galaxy’s perimeter, rippled with gas and dust, is dotted with pockets of blueish light. These are regions filled with very young stars, which are so hot that they glow with a bright blue hue. These young stars are burning at such high temperatures that they are emitting fierce radiation, burning away some of the dense material that surrounds them. In total, Messier 98 is thought to contain one trillion stars!
The NTT is a 3.58-metre telescope at the La Silla Observatory, which pioneered the use of active optics and was the first in the world to have a computer-controlled main mirror.
Credit: ESO
Acknowledgements: Flickr user jbarring
Coordinates Position (RA): 12 13 48.77 Position (Dec): 14° 54' 7.97" Field of view: 7.48 x 6.23 arcminutes Orientation: North is 90.9° left of vertical
Colours & filters Band Telescope Optical B New Technology Telescope EMMI Optical V New Technology Telescope EMMI Optical R New Technology Telescope EMMI.
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Autor/Urheber: European Space Agency, Lizenz: CC BY 2.0
This Hubble Picture of the Week shows the spiral galaxy Messier 98, which is located about 45 million light-years away in the constellation of Coma Berenices (Berenice's Hair). It was discovered in 1781 by the French astronomer Pierre Méchain, a colleague of Charles Messier, and is one of the faintest objects in Messier’s astronomical catalogue.
Messier 98 is estimated to contain about a trillion of stars, and is full of cosmic dust — visible here as a web of red-brown stretching across the frame — and hydrogen gas. This abundance of star-forming material means that Messier 98 is producing stellar newborns at a high rate; the galaxy shows the characteristic signs of stars springing to life throughout its bright centre and whirling arms.
This image of Messier 98 was taken in 1995 with the Wide Field and Planetary Camera 2, an instrument that was installed on the NASA/ESA Hubble Space Telescope from 1993 till 2009. These observations were taken in infrared and visible light as part of a study of galaxy cores within the Virgo Cluster, and feature a portion of the galaxy near the centre.
Credits: ESA/Hubble & NASA, V. Rubin et al.; <a href="https://creativecommons.org/licenses/by/4.0/" rel="noreferrer nofollow">CC BY 4.0</a>