NGC 2500

Galaxie
NGC 2500
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(c) ESA/Hubble, CC BY 4.0
Aufnahme des Hubble-Weltraumteleskops
AladinLite
SternbildLuchs
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension08h 01m 53,2s[1]
Deklination+50° 44′ 14″[1]
Erscheinungsbild
Morphologischer TypSB(rs)d / HII[1]
Helligkeit (visuell)11,5 mag[2]
Helligkeit (B-Band)12,2 mag[2]
Winkel­ausdehnung2,9′ × 2,7′[2]
Positionswinkel48°[2]
Flächen­helligkeit13,6 mag/arcmin²[2]
Physikalische Daten
ZugehörigkeitLDCE 558[1]
Rotverschiebung0.001715 ± 0.000002[1]
Radial­geschwin­digkeit(514 ± 1) km/s[1]
Hubbledistanz
H0 = 73 km/(s • Mpc)		(25 ± 2) · 106 Lj
(7,55 ± 0,53) Mpc [1]
Durchmesser20.000 Lj[3]
Geschichte
EntdeckungWilhelm Herschel
Entdeckungsdatum9. März 1788
Katalogbezeichnungen
NGC 2500 • UGC 4165 • PGC 22525 • CGCG 262-062 • MCG +09-13-110 • IRAS 07581+5052 • 2MASX J08015322+5044135 • GC 1607 • H III 709 • h 478 • KARA 224 •

NGC 2500 ist eine spiralförmige Zwerggalaxie mit ausgedehnten Sternentstehungsgebieten vom Hubble-Typ SBcd im Sternbild Luchs am Nordsternhimmel. Sie ist schätzungsweise 24 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 20.000 Lj.

Gemeinsam mit NGC 2541, NGC 2537, NGC 2552 und NGC 2841 bildet sie die NGC-2841-Galaxiengruppe.

Das Objekt wurde am 19. Januar 1788 von dem Astronomen Wilhelm Herschel mit einem 48-cm-Teleskop entdeckt.[4]

Commons: NGC 2500 – Sammlung von Bildern, Videos und Audiodateien

Einzelnachweise

  1. ↑ a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c d e SEDS: NGC 2500
  3. ↑ NASA/IPAC
  4. ↑ Seligman

Auf dieser Seite verwendete Medien

NGC 2500 - HST - Potw1728a.tif
(c) ESA/Hubble, CC BY 4.0

Just like home

Discovered by British astronomer William Herschel over 200 years ago, NGC 2500 lies about 30 million light-years away in the northern constellation of Lynx. As this NASA/ESA Hubble Space Telescope image shows, NGC 2500 is a particular kind of spiral galaxy known as a barred spiral, its wispy arms swirling out from a bright, elongated core.

Barred spirals are actually more common than was once thought. Around two-thirds of all spiral galaxies — including the Milky Way — exhibit these straight bars cutting through their centres. These cosmic structures act as glowing nurseries for newborn stars, and funnel material towards the active core of a galaxy. NGC 2500 is still actively forming new stars, although this process appears to be occurring very unevenly. The upper half of the galaxy — where the spiral arms are slightly better defined — hosts many more star-forming regions than the lower half, as indicated by the bright, dotted islands of light.

There is another similarity between NGC 2500 and our home galaxy. Together with Andromeda, Triangulum, and many smaller natural satellites, the Milky Way is part of the Local Group of galaxies, a gathering of over 50 galaxies all loosely held together by gravity. NGC 2500 forms a similar group with some of its nearby neighbours, including NGC 2541, NGC 2552, NGC 2537, and the bright, Andromeda-like spiral NGC 2481 (known collectively as the NGC 2841 group).

Credit:

ESA/Hubble & NASA 

Coordinates
Position (RA):	8 1 53.04
Position (Dec):	50° 44' 14.95"
Field of view:	2.77 x 2.56 arcminutes
Orientation:	North is 1.0° left of vertical

Colours & filters Band	Wavelength	Telescope
Ultraviolet UV	275 nm	Hubble Space Telescope WFC3
Ultraviolet U	336 nm	Hubble Space Telescope WFC3
Optical B	438 nm	Hubble Space Telescope WFC3
Optical V	555 nm	Hubble Space Telescope WFC3
Infrared I	814 nm	Hubble Space Telescope WFC3
.