UGC 4881
| Galaxie UGC 4881/Arp 55 | |
|---|---|
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| Hubble-Aufnahme von UGC 4881 (Bildmitte; unten links die Galaxien PGC 82353 und PGC 2242096) | |
| AladinLite | |
| Sternbild | Luchs |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 09h 15m 55,1s[1] |
| Deklination | +44° 19′ 55″ [1] |
| Erscheinungsbild | |
| Morphologischer Typ | LINER;LIRG/HII [1] |
| Helligkeit (visuell) | 14,9 mag |
| Winkelausdehnung | 1′ × 0,9′ |
| Physikalische Daten | |
| Rotverschiebung | 0,03930 ± 0,00038 [1] |
| Radialgeschwindigkeit | (11780 ± 110) km/s [1] |
| Hubbledistanz vrad / H0 | (527 ± 37) · 106 Lj (161,5 ± 11,4) Mpc [1] |
| Geschichte | |
| Katalogbezeichnungen | |
| UGC 4881 • PGC 26132 • CGCG 238-25 • MCG +8-17-65 • IRAS 09126+4432 • Arp 55 • VV 155 • | |
UGC 4881 = Arp 55 (VV 155) ist ein wechselwirkendes Galaxienpaar im Sternbild Luchs mit einer Winkelausdehnung von etwa einer Bogenminute und einer Entfernung von etwa 527 Millionen Lichtjahren.
Halton Arp gliederte seinen Katalog ungewöhnlicher Galaxien nach rein morphologischen Kriterien in Gruppen. Diese Galaxie gehört zu der Klasse Spiralgalaxien mit einem kleinen Begleiter hoher Flächenhelligkeit auf einem Arm (Arp-Katalog).
Weblinks
Literatur
- Jeff Kanipe und Dennis Webb: The Arp Atlas of Peculiar Galaxies – A Chronicle and Observer’s Guide, Richmond 2006, ISBN 978-0-943396-76-7
Einzelnachweise
Auf dieser Seite verwendete Medien
UGC 4881, known as the "The Grasshopper," is a stunning system consisting of two colliding galaxies. It has a bright curly tail containing a remarkable number of star clusters. The galaxies are thought to be halfway through a merger the cores of the parent galaxies are still clearly separated, but their disks are overlapping. A supernova exploded in this system in 1999 and astronomers believe that a vigorous burst of star formation may have just started. This notable object is located in the constellation of Lynx, some 500 million light-years away from Earth. UGC 4881 is the 55th galaxy in Arp's Atlas of Peculiar Galaxies.
This image is part of a large collection of 59 images of merging galaxies taken by the Hubble Space Telescope and released on the occasion of its 18th anniversary on 24th April 2008.
| About the object | |
|---|---|
| Object name | UGC 4881, VV 155, Arp 055, "The Grasshopper" |
| Object description | Interacting Galaxies |
| Position (J2000) | 09 15 55.38 +44 19 55.3 |
| Constellation | Lynx |
| Distance | 500 million light-years (150 million parsecs) |
| About the data | |
| Data description | The Hubble image was created using HST data from proposal 10592: A. Evans (University of Virginia, Charlottesville/NRAO/Stony Brook University) |
| Instrument | ACS/WFC |
| Exposure date(s) | December 4, 2001 |
| Exposure time | 35 minutes |
| Filters | F435W (B) and F814W (I) |
