NGC 2188
| Galaxie NGC 2188 | |
|---|---|
 (c) ESA/Hubble, CC BY 4.0 | |
| Aufnahme mithilfe des Hubble-Weltraumteleskops | |
| AladinLite | |
| Sternbild | Taube |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 06h 10m 09,5s[1] |
| Deklination | −34° 06′ 22″[1] |
| Erscheinungsbild | |
| Morphologischer Typ | SB(s)m[1] |
| Helligkeit (visuell) | 11,5 mag[2] |
| Helligkeit (B-Band) | 12,1 mag[2] |
| Winkelausdehnung | 4,2′ × 1,1′[2] |
| Positionswinkel | 175°[2] |
| Flächenhelligkeit | 13,0 mag/arcmin²[2] |
| Physikalische Daten | |
| Rotverschiebung | 0.002492 ± 0.000013[1] |
| Radialgeschwindigkeit | (747 ± 4) km/s[1] |
| Hubbledistanz H0 = 73 km/(s • Mpc) | (25 ± 2) · 106 Lj (7,58 ± 0,54) Mpc [1] |
| Durchmesser | 30.000 Lj[3] |
| Geschichte | |
| Entdeckung | John Herschel |
| Entdeckungsdatum | 9. Januar 1836 |
| Katalogbezeichnungen | |
| NGC 2188 • PGC 18536 • ESO 364-037 • MCG -06-14-008 • IRAS 06083-3406 • 2MASX J06100970-3406499 • SGC 060821-3405.7 • AM 0608-340 • HIPASS J0610-34 | |
NGC 2188 ist eine Balken-Spiralgalaxie vom Hubble-Typ SBm im Sternbild Taube am Südsternhimmel. Sie ist schätzungsweise 25 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 50.000 Lj.
Das Objekt wurde am 9. Januar 1836 von John Herschel entdeckt.[4]
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(c) ESA/Hubble, CC BY 4.0
A Tilted Wonder
The blue and orange stars of the faint galaxy named NGC 2188 sparkle in this image taken with the NASA/ESA Hubble Space Telescope. Although NGC 2188 appears at first glance to consist solely of a narrow band of stars, it is classified by astronomers as a barred-spiral galaxy. It appears this way from our viewpoint on Earth as the centre and spiral arms of the galaxy are tilted away from us, with only the very narrow outer edge of the galaxy’s disc visible to us. Astronomers liken this occurrence to turning a dinner plate in your hands so you see only its outer edge. The true shape of the galaxy was identified by studying the distribution of the stars in the inner central bulge and outer disc and by observing the stars’ colours.
NGC 2188 is estimated to be just half the size of our Milky Way, at 50 000 light-years across, and it is situated in the northern hemisphere constellation of Columba (The Dove). Named in the late 1500s after Noah’s dove in biblical stories, the small constellation consists of many faint yet beautiful stars and astronomical objects.
Credit:
ESA/Hubble & NASA, R. Tully