NGC 6814
| Galaxie NGC 6814 | |
|---|---|
 | |
| Aufnahme des Hubble-Weltraumteleskops | |
| AladinLite | |
| Sternbild | Adler |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 19h 42m 40,6s[1] |
| Deklination | -10° 19′ 26″ [1] |
| Erscheinungsbild | |
| Morphologischer Typ | SAB(rs)bc / HII / Sy1.5 [1] |
| Helligkeit (visuell) | 11,3 mag [2] |
| Helligkeit (B-Band) | 12,1 mag [2] |
| Winkelausdehnung | 3′ × 2,8′ [2] |
| Flächenhelligkeit | 13,5 mag/arcmin² [2] |
| Physikalische Daten | |
| Rotverschiebung | 0,005214 ± 0,000007 [1] |
| Radialgeschwindigkeit | (1563 ± 2) km/s [1] |
| Hubbledistanz vrad / H0 | (75 ± 5) · 106 Lj (23,0 ± 1,6) Mpc [1] |
| Geschichte | |
| Entdeckung | William Herschel |
| Entdeckungsdatum | 2. August 1788 |
| Katalogbezeichnungen | |
| NGC 6814 • PGC 63545 • MCG -02-50-001 • IRAS 19399-1026 • 2MASX J19424057-1019255 • GC 4507 • H III 744 • h 2045 • | |
NGC 6814 ist eine Balkenspiralgalaxie mit aktivem Galaxienkern vom Hubble-Typ SBbc im Sternbild Adler am Nordsternhimmel. Sie ist schätzungsweise 75 Millionen Lichtjahre von der Milchstraße entfernt, hat einen Scheibendurchmesser von etwa 65.000 Lj und wird als Seyfertgalaxie klassifiziert.
Das Objekt wurde am 2. August 1788 von dem Astronomen William Herschel mit einem 48-cm-Teleskop entdeckt.[3]
Weblinks
- astronews.com: Bild des Tages 11. Mai 2016
- SIMBAD Astronomical Database
Einzelnachweise
Auf dieser Seite verwendete Medien
Autor/Urheber: Judy Schmidt from Fresh Meadows, NY, USA, Lizenz: CC BY 2.0
A while back, I processed a black and white version and mentioned that color would be coming sometime later. Well, here it is!
This new view of NGC 6814 taken a little over a year ago in 2013. It's a fabulous dataset especially in the V band. This image is composed of wideband infrared, near-infrared, and green light. Some blue, UV, or H-alpha would be nice but I can't complain because I didn't even have to clean a single cosmic ray. I expect to see a nice press release on this object sometime in the future. For now, you get a sneak peek from me.
Something to note about the processing: The infrared data did not cover the whole image, just most of it. The periphery of the image uses near-infrared data in place of the infrared so this is a mixed 3 channel and 2 channel + pseudo channel image. It's not too distracting but if you look carefully you'll easily notice some yellowish stars and background galaxies which should probably be more red than they are.
Data were collected for Proposal 12961, A Cepheid Distance to NGC6814.
Red: WFC3/IR F160W Green: WFC3/UVIS F814W Blue: WFC3/UVIS F555W
North is NOT up. It is 53° counter-clockwise from up.