NGC 6684
| Galaxie NGC 6684 | |
|---|---|
.jpg) (c) ESA/Hubble, CC BY 4.0 | |
| Aufnahme des Hubble-Weltraumteleskops | |
| AladinLite | |
| Sternbild | Pfau |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 18h 48m 57,9s[1] |
| Deklination | −65° 10′ 24″[1] |
| Erscheinungsbild | |
| Morphologischer Typ | (L)SB(r)0^+[1] |
| Helligkeit (visuell) | 10,3 mag[2] |
| Helligkeit (B-Band) | 11,3 mag[2] |
| Winkelausdehnung | 4,6′ × 2,9′[2] |
| Positionswinkel | 35°[2] |
| Flächenhelligkeit | 13,0 mag/arcmin²[2] |
| Physikalische Daten | |
| Rotverschiebung | 0,002945 ± 0,000006[1] |
| Radialgeschwindigkeit | (883 ± 2) km/s[1] |
| Hubbledistanz H0 = 73 km/(s • Mpc) | (35 ± 3) · 106 Lj (10,7 ± 0,8) Mpc [1] |
| Geschichte | |
| Entdeckung | John Herschel |
| Entdeckungsdatum | 8. Juni 1836 |
| Katalogbezeichnungen | |
| NGC 6684 • PGC 62453 • ESO 104-G016 • 2MASX J18485789-6510244 • AM 1843-651 • GC 4431 • h 3757 • LDCE 1321 NED002 | |
NGC 6684 ist eine linsenförmige Galaxie im Sternbild Pfau. Sie ist schätzungsweise 35 Millionen Lichtjahre von der Milchstraße entfernt.
Die Galaxie wurde am 8. Juni 1836 von dem Astronomen John Herschel mit seinem 18,7-Zoll-Teleskop entdeckt und später von Johan Dreyer in seinen New General Catalogue aufgenommen.[3]
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Portrait of a Ghostly Galactic Peacock (potw2332a).jpg
(c) ESA/Hubble, CC BY 4.0
The lenticular galaxy NGC 6684 bathes this image from the NASA/ESA Hubble Space Telescope in a pale light. Captured with Hubble’s Advanced Camera for Surveys, this lenticular galaxy is around 44 million light-years from Earth in the constellation Pavo. Pavo — whose name is Latin for peacock — is a constellation in the southern sky and one of four constellations collectively known as the Southern Birds.Lenticular galaxies like NGC 6684 (lenticular means lens-shaped) possess a large disc but lack the prominent spiral arms of galaxies like the Andromeda Galaxy. This leaves them somewhere between elliptical galaxies and spiral galaxies, and lends these galaxies a diffuse, ghostly experience. NGC 6684 also lacks the dark dust lanes that thread through other galaxies, adding to its spectral, insubstantial appearance.The data in this image were captured during a census of the nearby Universe entitled Every Known Nearby Galaxy which aims to observe all galaxies within 10 megaparsecs (32.6 million light-years) that the telescope has not already visited. Before this programme began Hubble had observed roughly 75% of these nearby galaxies, and completing this census will reveal insights into the stars making up a wide variety of galaxies, in a wide variety of environments.[Image Description: A galaxy, large and occupying most of the view from the centre. The whole galaxy is made of smooth, diffuse light. The galaxy is surrounded by a smoky grey halo. Many stars shine around the galaxy, on a black background.]
(c) ESA/Hubble, CC BY 4.0
The lenticular galaxy NGC 6684 bathes this image from the NASA/ESA Hubble Space Telescope in a pale light. Captured with Hubble’s Advanced Camera for Surveys, this lenticular galaxy is around 44 million light-years from Earth in the constellation Pavo. Pavo — whose name is Latin for peacock — is a constellation in the southern sky and one of four constellations collectively known as the Southern Birds.Lenticular galaxies like NGC 6684 (lenticular means lens-shaped) possess a large disc but lack the prominent spiral arms of galaxies like the Andromeda Galaxy. This leaves them somewhere between elliptical galaxies and spiral galaxies, and lends these galaxies a diffuse, ghostly experience. NGC 6684 also lacks the dark dust lanes that thread through other galaxies, adding to its spectral, insubstantial appearance.The data in this image were captured during a census of the nearby Universe entitled Every Known Nearby Galaxy which aims to observe all galaxies within 10 megaparsecs (32.6 million light-years) that the telescope has not already visited. Before this programme began Hubble had observed roughly 75% of these nearby galaxies, and completing this census will reveal insights into the stars making up a wide variety of galaxies, in a wide variety of environments.[Image Description: A galaxy, large and occupying most of the view from the centre. The whole galaxy is made of smooth, diffuse light. The galaxy is surrounded by a smoky grey halo. Many stars shine around the galaxy, on a black background.]