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Medusa nebula, Abell 21
The Medusa nebula, known scientifically as Abell 21, is an old planetary nebula some 1,500 light-years away in the constellation Gemini. It is estimated to be over 4 light-years across. This image was taken on Oct 24th, 2008 at the Mayall telescope with the mosaic camera, with [OIII] (assigned a blue color) and H-alpha (orange) filters This image was released during the 100 Hours of Astronomy webcast, "Around the World in 80 Telescopes" held from April 3-4, 2009, during the International Year of Astronomy 2009. View the recorded event from KPNO. See also this image of NGC 6520 from CTIO, which was also released during the webcast.
Créditos:About the Image
Id: | noaoann09008a |
Tipo: | Observation |
Release date: | 21 de Abril de 2009 |
Related announcements: | noaoann09008 |
Size: | 8333 x 8304 px |
Sobre el Objeto
Nombre: | Medusa Nebula, Sh 2-274 |
Distance: | 1800 light years |
Constellation: | Gemini |
Categoría: | Nebulae |
Formatos de Imágenes
Fondos de Pantalla
Coordenadas
Posición (AR): | 7 29 3.46 |
Posición (Dec): | 13° 15' 16.17" |
Campo visual: | 36.03 x 35.90 arcminutes |
Orientación: | North is 90.1° left of vertical |
Colores y Filtros
Banda | Longitud de Onda | Telescopio |
---|---|---|
Optical Olll | 499 nm | Nicholas U. Mayall 4-meter Telescope Mosaic I |
Optical Ha | 656 nm | Nicholas U. Mayall 4-meter Telescope Mosaic I |