IC 4955
These two nebulae, IC 4954 and IC 4955, are part of a much larger complex of newly formed stars. This much larger cluster is called Roslund 4 and astronomers estimate that the stars found here are 4 million years old. The very sharp boundary (shock front) between some of these stars and the molecular cloud serves as a chronometer for the cluster. It is unlikely that a structure like this, caused by the outflow of these energetic young stars, would persist for timescales longer than 6 million years. It is estimated that this star forming region is 6,000-8,000 light years away.
This image was taken as part of Advanced Observing Program (AOP) program at Kitt Peak Visitor Center during 2014.
Créditos:KPNO/NOIRLab/NSF/AURA/Adam Block
About the Image
Id: | noao-ic4955block |
Tipo: | Observation |
Release date: | 7 de Junio de 2014 a las 09:25 |
Size: | 1441 x 972 px |
Sobre el Objeto
Fondos de Pantalla
Coordenadas
Posición (AR): | 20 5 7.61 |
Posición (Dec): | 29° 13' 8.12" |
Campo visual: | 12.38 x 8.35 arcminutes |
Orientación: | North is 10.2° left of vertical |
Colores y Filtros
Banda | Longitud de Onda | Telescopio |
---|---|---|
Optical B | 438 nm | Visitor Center 0.5-meter Telescope Other CCD |
Optical G | 475 nm | Visitor Center 0.5-meter Telescope Other CCD |
Optical R | 625 nm | Visitor Center 0.5-meter Telescope Other CCD |
Optical Broad Band | 555 nm | Visitor Center 0.5-meter Telescope Other CCD |