TR 20
Postado por
jsmoraes
–
jsmoraes
–
Newtonian reflector telescope - CMOS mono camera - LRGB filters
4 x 10 x 1 min - LRGB
Constelação Cruzeiro do Sul.
It is hard cluster to register, since it is faint and have many background stars around. There are many studies and papers about it, although I didn't find any photo of it.
The cluster is on the center of FOV.
Old open cluster located toward the Galactic centre, at about 3 kpc from the Sun and ∼7 kpc from the Galactic centre, resides in the inner part of the disc.
The heavy contamination of field stars (the line of sight of Tr 20 crosses the Carina spiral arm) complicates its view.
It shows a broadened main-sequence turn-off and a prominent and extended red-clump, characteristics that are not easily explained by classical evolutionary models.
Tr 20 has an age in the range 1.35-1.66 Gyr and contains more than 700 stars
4 x 10 x 1 min - LRGB
Constelação Cruzeiro do Sul.
It is hard cluster to register, since it is faint and have many background stars around. There are many studies and papers about it, although I didn't find any photo of it.
The cluster is on the center of FOV.
Old open cluster located toward the Galactic centre, at about 3 kpc from the Sun and ∼7 kpc from the Galactic centre, resides in the inner part of the disc.
The heavy contamination of field stars (the line of sight of Tr 20 crosses the Carina spiral arm) complicates its view.
It shows a broadened main-sequence turn-off and a prominent and extended red-clump, characteristics that are not easily explained by classical evolutionary models.
Tr 20 has an age in the range 1.35-1.66 Gyr and contains more than 700 stars
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