Robert's Quartet

Robert's Quartet is a family of four very different galaxies, located at a distance of about 160 million light-years, close to the centre of the southern constellation of the Phoenix. Its members are NGC 87, NGC 88, NGC 89 and NGC 92, discovered by John Herschel in the 1830s.

NGC 87 (upper right) is an irregular galaxy similar to the satellites of our Milky Way, the Magellanic Clouds. NGC 88 (centre) is a spiral galaxy with an external diffuse envelope, most probably composed of gas. NGC 89 (lower middle) is another spiral galaxy with two large spiral arms. The largest member of the system, NGC 92 (left), is a spiral Sa galaxy with an unusual appearance. One of its arms, about 100,000 light-years long, has been distorted by interactions and contains a large quantity of dust.

Créditos:

ESO

Sobre a imagem

Id:eso0535a
Tipo:Observação
Data de divulgação:4 de Novembro de 2005
Notícias relacionadas:eso0535
Tamanho:1825 x 1688 px

Sobre o objeto

Nome:NGC 87, NGC 88, NGC 89, NGC 92
Tipo:Local Universe : Galaxy
Distância:150 milhão anos-luz
Constellation:Phoenix
Categoria:Galaxies

Formatos de imagens

JPEG grande
1,6 MB

Papéis de parede

1024x768
158,2 KB
1280x1024
328,6 KB
1600x1200
671,9 KB
1920x1200
991,2 KB
2048x1536
1,3 MB

Coordenadas

Position (RA):0 21 22.07
Position (Dec):-48° 38' 33.78"
Field of view:6.11 x 5.65 arcminutes
Orientação:O norte está a 1.6° à direita da vertical

Cores e filtros

BandaComprimento de ondaTelescópio
Óptico
B
440 nmVery Large Telescope
FORS2
Óptico
V
557 nmVery Large Telescope
FORS2
Óptico
R
655 nmVery Large Telescope
FORS2
Infravermelho
I
768 nmVery Large Telescope
FORS2