NGC 2903

Galaxie
NGC 2903
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Aufnahme mit dem 81-cm-Spiegelteleskop des Mount-Lemmon-Observatoriums.
AladinLite
SternbildLöwe
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension09h 32m 10,11s[1]
Deklination+21° 30′ 03,0″[1]
Erscheinungsbild
Morphologischer TypSAB(rs)bc I-II / HII[1]
Helligkeit (visuell)8,8 mag[2]
Helligkeit (B-Band)9,6 mag[2]
Winkel­ausdehnung12,6′ × 6′[2]
Positionswinkel17°[2]
Flächen­helligkeit13,3 mag/arcmin²[2]
Physikalische Daten
ZugehörigkeitIsoliert[1]
Rotverschiebung0,001834 ± 0,000001[1]
Radial­geschwin­digkeit(550 ± 0) km/s[1]
Hubbledistanz
H0 = 73 km/(s • Mpc)		(21 ± 1) · 106 Lj
(6,43 ± 0,45) Mpc [1]
Durchmesser100.000 Lj[3]
Geschichte
EntdeckungWilhelm Herschel
Entdeckungsdatum16. November 1784
Katalogbezeichnungen
NGC 2903 • NGC 2905 • UGC 5079 • PGC 27077 • CGCG 122-014 • MCG +04-23-009 • IRAS 09293+2143 • 2MASX J09321011+2130029 • GC 1861 • H I 56 • h 604 • HIPASS J0932+21 • KIG 347 • NVSS J093210+213010

NGC 2903 ist eine Balken-Spiralgalaxie vom Hubble-Typ SBbc mit hoher Sternentstehungsrate im Sternbild Löwe an der Ekliptik. Die Galaxie ist rund 21 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von 100.000 Lichtjahren.

Im selben Himmelsareal befinden sich unter anderem die Galaxien PGC 26951, PGC 27115, PGC 164868, PGC 1647510.[4]

Das Objekt wurde am 16. November 1784 von dem deutsch-britischen Astronomen Wilhelm Herschel entdeckt. Der Katalogeintrag NGC 2905 geht auf ein helles Gebiet in NGC 2903 zurück.[5]

Literatur

  • König, Michael & Binnewies, Stefan (2019): Bildatlas der Galaxien: Die Astrophysik hinter den Astrofotografien, Stuttgart: Kosmos, S. 137

Weblinks

Einzelnachweise

  1. ↑ a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c d e SEDS: NGC 2903
  3. ↑ NASA/IPAC
  4. ↑ SIMBAD
  5. ↑ Seligman

Auf dieser Seite verwendete Medien

NGC2903 - HST - Potw2143a.jpg
Autor/Urheber: (Credit) ESA/Hubble & NASA, L. Ho, J. Lee and the PHANGS-HST Team, Lizenz: CC BY 4.0
Hubble Experiences Déjà vu

This jewel-bright Picture of the Week features the spiral galaxy NGC 2903. This image was captured using Hubble’s Advanced Camera for Surveys (ACS) and Wide Field Camera 3 (WFC3), which were installed on Hubble in 2002 and 2009 respectively. Interestingly, Hubble has observed this particular galaxy before, in 2001, when neither the ACS or the WFC3 had yet been installed. The 2021 image boasts higher resolution, which means that NGC 2903 is more finely detailed than in the 2001 image. The ACS and WFC2 collectively cover a wide range of ultraviolet, optical and infrared wavelengths, which means that the 2021 image also has superior wavelength coverage to that of its 20-year-old predecessor. The 2001 image was taken using the Wide Field Planetary Camera 2 (WFPC2), which was Hubble’s workhorse instrument from 1993 until 2009 when it was replaced by the WFC3.

Hubble has a long and fascinating history of crewed service missions, which were performed in order to correct for imperfections in Hubble’s mirror, to update Hubble’s technical systems, and to remove old instruments and install new ones. One of Hubble’s most remarkable features is it’s incredible longevity, and this would not have been possible with the great success of the servicing missions. The juxtaposition of the 2001 and 2021 images of NGC 2903 — both remarkable images for their time — highlights the value of a stable, accessible platform in space that can reliably collect data, not only year after year, but decade after decade.

Credit:

ESA/Hubble & NASA, L. Ho, J. Lee and the PHANGS-HST Team 


Coordinates
Position (RA):  	9 32 10.05
Position (Dec): 	21° 29' 39.76"
Field of view:  	3.90 x 2.62 arcminutes
Orientation:   	North is 295.8° right of vertical

Colours & filters Band	Wavelength	Telescope
Optical U	336 nm	Hubble Space Telescope WFC3
Ultraviolet UV	275 nm	Hubble Space Telescope WFC3
Optical B	438 nm	Hubble Space Telescope WFC3
Optical V	555 nm	Hubble Space Telescope WFC3
Optical I	814 nm	Hubble Space Telescope WFC3
Optical N II	658 nm	Hubble Space Telescope ACS
.
NGC 2903 GALEX.jpg
NGC 2903 galaxy on GALEX sky survey
N2903s.jpg
Autor/Urheber: Credit Line and Copyright Adam Block/Mount Lemmon SkyCenter/University of Arizona, Lizenz: CC BY-SA 3.0 us
NGC 2903

Picture Details: 

   Optics            32-inch Schulman RC Optical Systems Telescope
   Camera            SBIG STx16803 CCD Camera
   Filters           AstroDon Generation II
   Dates             January and February 2015
   Location          Mount Lemmon SkyCenter
   Exposure          LRGB = 9:3:3:3 Hours
   Acquisition       Maxim DL/CCD (Cyanogen), AStronomer Control Panel (DC3- Dreams)
   Processing        CCDStack (CCDWare), Photoshop CC, PixInsight
Credit Line and Copyright Adam Block/Mount Lemmon SkyCenter/University of Arizona
NGC2905 - SDSS DR14 (panorama).jpg
Autor/Urheber: Sloan Digital Sky Survey, Lizenz: CC BY 4.0
Color mapping
The sky image is obtained by Sloan Digital Sky Survey, DR14 with SciServer.

Angle of view: 15' × 15' (0.45" per pixel), north is up.

Details on the image processing pipeline: https://www.sdss.org/dr14/imaging/jpg-images-on-skyserver/