A Hubble gem: the Jewel Box

This image is a “close-up” view from the NASA/ESA Hubble Space Telescope of NGC 4755, or the Jewel Box cluster. Several very bright, pale blue supergiant stars, a solitary ruby-red supergiant and a variety of other brilliantly coloured stars are visible in the image, as well as many much fainter ones, often with intriguing colours. The huge variety in brightness exists because the brighter stars are 15 to 20 times the mass of the Sun, while the dim points are less than half the mass of the Sun. This is the first image of an open galactic cluster with imaging extending from the far ultraviolet to the near-infrared.

Crediti:

NASA/ESA and Jesús Maíz Apellániz (Instituto de Astrofísica de Andalucía, Spain)

A proposito dell'immagine

Identificazione:eso0940c
Tipo:Osservazione
Data di pubblicazione:29 Ottobre 2009
Notizie relative:eso0940
Dimensione:3016 x 1487 px

A proposito delll'oggetto

Nome:NGC 4755
Tipo:Milky Way : Star : Grouping : Cluster
Distanza:6500 Anni luce
Constellation:Crux
Categoria:Star Clusters

Formati delle immagini

JPEG grande
626,9 KB

Sfondi

1024x768
136,3 KB
1280x1024
198,6 KB
1600x1200
283,0 KB
1920x1200
340,8 KB
2048x1536
416,7 KB

Coordinate

Position (RA):12 53 42.12
Position (Dec):-60° 22' 1.21"
Field of view:2.51 x 1.24 arcminutes
Orientazione:Il Nord è a 35.3° a destra della verticale

Colori e filtri

BandaLunghezza d'ondaTelescopio
Ultravioletto
Far-UV
170 nmHubble Space Telescope
WFPC2
Ultravioletto
Mid-UV
255 nmHubble Space Telescope
WFPC2
Ultravioletto
Near-UV
336 nmHubble Space Telescope
WFPC2
Ottico
B
439 nmHubble Space Telescope
WFPC2
Ottico
V
547 nmHubble Space Telescope
WFPC2
Ottico
R
675 nmHubble Space Telescope
WFPC2
Infrarosso
I
814 nmHubble Space Telescope
WFPC2