NGC 5495
| Galaxie NGC 5495 | |
|---|---|
 (c) Credit: ESA/Hubble & NASA, J. Greene Acknowledgement: R. Colombari, CC BY 4.0 | |
| Aufnahme mithilfe des Hubble-Weltraumteleskops | |
| AladinLite | |
| Sternbild | Wasserschlange |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 14h 12m 23,3s[1] |
| Deklination | −27° 06′ 29″[1] |
| Erscheinungsbild | |
| Morphologischer Typ | (R')SA(rs)b;Sy2HII?[1] |
| Helligkeit (visuell) | 12,8 mag[2] |
| Helligkeit (B-Band) | 13,5 mag[2] |
| Winkelausdehnung | 1,5′ × 1,2′[2] |
| Positionswinkel | 38°[2] |
| Flächenhelligkeit | 13,3 mag/arcmin²[2] |
| Physikalische Daten | |
| Rotverschiebung | 0.022472 ± 0.000030[1] |
| Radialgeschwindigkeit | (6737 ± 9) km/s[1] |
| Hubbledistanz H0 = 73 km/(s • Mpc) | (296 ± 21) · 106 Lj (90,9 ± 6,4) Mpc [1] |
| Geschichte | |
| Entdeckung | John Herschel |
| Entdeckungsdatum | 13. Mai 1834 |
| Katalogbezeichnungen | |
| NGC 5495 • PGC 50729 • ESO 511-10 • MCG -04-34-001 • IRAS 14095-2652 • SGC 140931-2652.4 • GC 3803 • h 3561 • LDCE 1036 NED027 | |
NGC 5495 ist eine 12,8 mag helle balkenspiralförmige Seyfertgalaxie (Typ 2) vom Hubble-Typ SBc im Sternbild Wasserschlange und etwa 296 Millionen Lichtjahre von der Milchstraße entfernt.
Sie wurde am 13. Mai 1834 von John Herschel mit einem 18-Zoll-Spiegelteleskop entdeckt,[3] der dabei „vF, S, R, bM, N.p. a star“[4] notierte.
Weblinks
- NGC 5495. SIMBAD, abgerufen am 9. März 2016 (englisch).
- NGC 5495. DSO Browser, abgerufen am 9. März 2016 (englisch).
Einzelnachweise
Auf dieser Seite verwendete Medien
(c) Credit:
ESA/Hubble & NASA, J. Greene
Acknowledgement: R. Colombari, CC BY 4.0Hubble Spies a Stately Spiral Galaxy
The stately sweeping spiral arms of the spiral galaxy NGC 5495 are revealed by the NASA/ESA Hubble Space Telescope’s Wide Field Camera 3 in this image. NGC 5495, which lies around 300 million light-years from Earth in the constellation Hydra, is a Seyfert galaxy, a type of galaxy with a particularly bright central region. These luminous cores — known to astronomers as active galactic nuclei — are dominated by the light emitted by dust and gas falling into a supermassive black hole.
This image is drawn from a series of observations captured by astronomers studying supermassive black holes lurking in the hearts of other galaxies. Studying the central regions of galaxies can be challenging: as well as the light created by matter falling into supermassive black holes, areas of star formation and the light from existing stars all contribute to the brightness of galactic cores. Hubble’s crystal-clear vision helped astronomers disentangle the various sources of light at the core of NGC 5495, allowing them to precisely weigh its supermassive black hole.
As well as NGC 5495, two stellar interlopers are visible in this image. One is just outside the centre of NGC 5495, and the other is very prominent alongside the galaxy. While they share the same location on the sky, these objects are much closer to home than NGC 5495: they are stars from our own Milky Way. The bright stars are surrounded by criss-cross diffraction spikes, optical artefacts created by the internal structure of Hubble interacting with starlight.
Credit:
ESA/Hubble & NASA, J. Greene Acknowledgement: R. Colombari
Coordinates Position (RA): 14 12 24.16 Position (Dec): -27° 6' 25.32" Field of view: 1.61 x 1.04 arcminutes Orientation: North is 148.9° right of vertical
Colours & filters Band Wavelength Telescope Optical U 336 nm Hubble Space Telescope WFC3 Optical B 438 nm Hubble Space Telescope WFC3 Optical I 814 nm Hubble Space Telescope WFC3 Infrared YJ 1.1 μm Hubble Space Telescope WFC3 Infrared H 1.6 μm Hubble Space Telescope WFC3.