NGC 337
| Galaxie NGC 337 | |
|---|---|
 (c) ESA/Hubble, CC BY 4.0 | |
| Aufnahme mithilfe des Hubble-Weltraumteleskops | |
| AladinLite | |
| Sternbild | Walfisch |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 00h 59m 50,1s [1] |
| Deklination | −07° 34′ 41″ [1] |
| Erscheinungsbild | |
| Morphologischer Typ | SB(s)d / HII[1] |
| Helligkeit (visuell) | 11,6 mag[2] |
| Helligkeit (B-Band) | 12,3 mag[2] |
| Winkelausdehnung | 3′ × 1,8′[2] |
| Positionswinkel | 141°[2] |
| Flächenhelligkeit | 13,3 mag/arcmin²[2] |
| Physikalische Daten | |
| Zugehörigkeit | NGC 337-Gruppe LGG 15[1][3] |
| Rotverschiebung | 0,005504 ± 0,000005[1] |
| Radialgeschwindigkeit | (1650 ± 1) km/s[1] |
| Hubbledistanz H0 = 73 km/(s • Mpc) | (76 ± 5) · 106 Lj (23,3 ± 1,6) Mpc [1] |
| Durchmesser | 65.000 Lj[4] |
| Geschichte | |
| Entdeckung | Wilhelm Herschel |
| Entdeckungsdatum | 10. September 1785 |
| Katalogbezeichnungen | |
| NGC 337 • PGC 3572 • MCG -01-03-053 • IRAS 00573-0750 • 2MASX J00595009-0734406 • GC 185 • H II 433 • h 80 • HIPASS J0059-07 | |
NGC 337 ist eine Balken-Spiralgalaxie mit ausgedehnten Sternentstehungsgebieten vom Hubble-Typ SBcd im Sternbild Walfisch südlich der Ekliptik. Sie ist schätzungsweise 76 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 65.000 Lichtjahren.
Gemeinsam mit NGC 274, NGC 275 und NGC 298 bildet sie die NGC 337-Gruppe.[3]
Die Typ-IIP-Supernovae SN 2011dq und SN 2014cx wurden hier beobachtet.[5]
Das Objekt wurde am 10. September 1785 von dem deutsch-britischen Astronomen Wilhelm Herschel entdeckt.[6]
NGC 337-Gruppe (LGG 15)
| Galaxie | Alternativname | Entfernung/Mio. Lj |
|---|---|---|
| NGC 337 | PGC 3572 | 76 |
| NGC 274 | PGC 2980 | 81 |
| NGC 275 | PGC 2984 | 81 |
| NGC 298 | PGC 3250 | 81 |
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NGC 337 imaged by the Hubble Space Telescope.jpg
(c) ESA/Hubble, CC BY 4.0
The subject of this NASA/ESA Hubble Space Telescope Picture of the Week is the spiral galaxy NGC 337, located about 60 million light-years away in the constellation Cetus (The Whale). This image combines observations made at two wavelengths, highlighting the galaxy’s golden centre and blue outskirts. The golden central glow comes from older stars, while the sparkling blue edges get their colour from young stars. If Hubble had observed NGC 337 about a decade ago, the telescope would have spotted something remarkable among the hot blue stars along the galaxy’s edge: a brilliant supernova. The supernova, named SN 2014cx, is remarkable for having been discovered nearly simultaneously in two vastly different ways: by a prolific supernova hunter, Koichi Itagaki, and by the All Sky Automated Survey for SuperNovae (ASAS-SN). ASAS-SN is a worldwide network ofrobotic telescopes that scans the sky for sudden events like supernovae. Researchers have determined that SN 2014cx was a Type IIP supernova. The “Type II” classification means that the exploding star was a supergiant at least eight times as massive as the Sun. The “P” stands for plateau,meaning that after the light from the supernova began to fade, the level reached a plateau, remaining at the same brightness for several weeks or months before fading further. This type of supernova occurs when a massive star can no longer produce enough energy in its core to stave off the crushingpressure of gravity. SN 2014cx’s progenitor star is estimated to have been ten times more massive than the Sun and hundreds of times as wide. Though it has long since dimmed from its initial brilliance, researchers are still keeping tabs on this exploded star, not least through the Hubble observing programme which produced this image. [Image Description: A barred spiral galaxy on a dark background. The galaxy’s central region is a pale colour due to older stars, contains some pale reddish threads of dust, and is brighter along a broad horizontal bar through the very centre. Off the bar come several stubby spiral arms, merging into the outer region of the disc. It is a cool blue colour and contains some bright sparkling blue spots, both indicating young hot stars.]
(c) ESA/Hubble, CC BY 4.0
The subject of this NASA/ESA Hubble Space Telescope Picture of the Week is the spiral galaxy NGC 337, located about 60 million light-years away in the constellation Cetus (The Whale). This image combines observations made at two wavelengths, highlighting the galaxy’s golden centre and blue outskirts. The golden central glow comes from older stars, while the sparkling blue edges get their colour from young stars. If Hubble had observed NGC 337 about a decade ago, the telescope would have spotted something remarkable among the hot blue stars along the galaxy’s edge: a brilliant supernova. The supernova, named SN 2014cx, is remarkable for having been discovered nearly simultaneously in two vastly different ways: by a prolific supernova hunter, Koichi Itagaki, and by the All Sky Automated Survey for SuperNovae (ASAS-SN). ASAS-SN is a worldwide network ofrobotic telescopes that scans the sky for sudden events like supernovae. Researchers have determined that SN 2014cx was a Type IIP supernova. The “Type II” classification means that the exploding star was a supergiant at least eight times as massive as the Sun. The “P” stands for plateau,meaning that after the light from the supernova began to fade, the level reached a plateau, remaining at the same brightness for several weeks or months before fading further. This type of supernova occurs when a massive star can no longer produce enough energy in its core to stave off the crushingpressure of gravity. SN 2014cx’s progenitor star is estimated to have been ten times more massive than the Sun and hundreds of times as wide. Though it has long since dimmed from its initial brilliance, researchers are still keeping tabs on this exploded star, not least through the Hubble observing programme which produced this image. [Image Description: A barred spiral galaxy on a dark background. The galaxy’s central region is a pale colour due to older stars, contains some pale reddish threads of dust, and is brighter along a broad horizontal bar through the very centre. Off the bar come several stubby spiral arms, merging into the outer region of the disc. It is a cool blue colour and contains some bright sparkling blue spots, both indicating young hot stars.]
Credit:
ESA/Hubble & NASA, C. Kilpatrick