The central part of Messier 12
Centre of the globular cluster Messier 12 as observed with the FORS-1 multi-mode instrument on ESO's Very Large Telescope (Cerro Paranal, Chile). The picture covers a region of about 3.5 arcmin on a side, corresponding to about 23 light-years at the distance of Messier 12. It is based on data in five different filters : U, B, V, R and H-alpha. Here only the short exposures were used while for their scientific analysis, the authors used much longer exposures. Guido De Marchi (ESA) reduced the data and Kristina Boneva and Haennes Heyer (ESO) did the final image processing. The observations were obtained with very good conditions, the image quality ('seeing') being around 0.6 arcsec.
Crediti:ESO
A proposito dell'immagine
Identificazione: | eso0604a |
Tipo: | Osservazione |
Data di pubblicazione: | 07 Febbraio 2006 |
Notizie relative: | eso0604 |
Dimensione: | 3060 x 3056 px |
A proposito delll'oggetto
Nome: | Messier 12 |
Tipo: | Milky Way : Star : Grouping : Cluster : Open |
Distanza: | 23000 Anni luce |
Constellation: | Ophiuchus |
Categoria: | Star Clusters |
Formati delle immagini
Coordinate
Position (RA): | 16 47 14.25 |
Position (Dec): | -1° 56' 48.17" |
Field of view: | 3.39 x 3.39 arcminutes |
Orientazione: | Il Nord è a 0.0° a sinistra della verticale |
Colori e filtri
Banda | Lunghezza d'onda | Telescopio |
---|---|---|
Ottico H-alpha | 656 nm | Very Large Telescope FORS1 |
Ottico R | 600 nm | Very Large Telescope FORS1 |
Ottico V | 554 nm | Very Large Telescope FORS1 |
Ottico B | 420 nm | Very Large Telescope FORS1 |
Ultravioletto U | 360 nm | Very Large Telescope FORS1 |