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.
Oikeudet:ESO
Kuvasta
| Tunnistus: | eso0604a |
| Tyyppi: | Havainto |
| Julkaisupäivä: | 7. helmikuuta 2006 |
| Vastaavat julkaisut: | eso0604 |
| Koko: | 3060 x 3056 px |
Kohteesta
| Nimi: | Messier 12 |
| Tyyppi: | Milky Way : Star : Grouping : Cluster : Open |
| Etäisyys: | 23000 valovuotta |
| Constellation: | Ophiuchus |
| Kategoria: | Star Clusters |
Taustakuvat
Koordinaatit
| Position (RA): | 16 47 14.25 |
| Position (Dec): | -1° 56' 48.17" |
| Field of view: | 3.39 x 3.39 arcminutes |
| Suuntaus: | Pohjoinen on 0.0° vasen pystysuuntaan nähden |
Katso WorldWide Telescope:ssa:
Värit ja suotimet
| Kaista | Aallonpituus | Teleskooppi |
|---|---|---|
| Optinen H-alpha | 656 nm | Very Large Telescope FORS1 |
| Optinen R | 600 nm | Very Large Telescope FORS1 |
| Optinen V | 554 nm | Very Large Telescope FORS1 |
| Optinen B | 420 nm | Very Large Telescope FORS1 |
| Ultravioletti U | 360 nm | Very Large Telescope FORS1 |