Collinder 277
(OCL 909; ESO 097 06; MWSC 2166; FoF 2061)
0.97
UTI
0.84
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
Radius (P>50% members)
7.3 [arcmin]
- CN 0.84 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 1.0 Very well-studied
- Cdup 1.0 Unique
Overview
Collinder 277 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.
Relatively close
Low extinction
Near-solar metallicity
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 207.069 | -66.062 | 0.592 | -9.249 | -4.115 | -28.94 |
| Li et al. | 2025 | 207.058 | -66.066 | 0.576 | -9.225 | -4.139 | â |
| Hu & Soubiran | 2025 | 207.049 | -66.067 | â | â | â | â |
| Wei et al. | 2025 | 207.063 | -66.067 | 0.596 | -9.252 | -4.122 | â |
| Almeida et al. | 2025 | 207.04 | -66.066 | â | â | â | â |
| Hunt & Reffert | 2024 | 207.065 | -66.059 | 0.597 | -9.255 | -4.118 | -30.102 |
| Cavallo et al. | 2024 | 207.049 | -66.067 | 0.597 | â | â | â |
| Hunt & Reffert | 2023 | 207.065 | -66.059 | 0.597 | -9.255 | -4.118 | -30.102 |
| Almeida et al. | 2023 | 207.058 | -66.055 | â | â | â | â |
| Dias et al. | 2021 | 207.04 | -66.066 | 0.58 | -9.234 | -4.137 | -27.776 |
| Cantat-Gaudin et al. | 2020 | 207.058 | -66.066 | 0.576 | -9.225 | -4.139 | â |
| Cantat-Gaudin & Anders | 2020 | 207.058 | -66.066 | 0.576 | -9.225 | -4.139 | â |
| Liu & Pang | 2019 | 207.026 | -66.056 | 0.599 | -9.226 | -4.142 | â |
| Soubiran et al. | 2018 | 207.058 | -66.066 | â | â | â | -27.28 |
| Bica et al. | 2019 | 207.041 | -66.06 | â | â | â | â |
| Cantat-Gaudin et al. | 2018 | 207.058 | -66.066 | 0.576 | -9.225 | -4.139 | â |
| Dias et al. | 2014 | 207.1 | -66.067 | â | -5.25 | -6.42 | â |
| Dias et al. | 2002 | 207.1 | -66.067 | â | -5.25 | -6.42 | â |
đĄ Note: The UCC values are estimated from its identified members.
| Reference | Year | Dist [kpc] | Av [mag] | DAv [mag] | Age [Myr] | [Fe/H] [dex] | Mass [Msun] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Li et al. | 2025 | 1.49 | 0.85 | â | 965 | -0.044 | â | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.180* | â | â | â |
| Wei et al. | 2025 | 2.05 | 0.77 | â | 692 | 0.500 | 855 | 0.58 | â |
| Almeida et al. | 2025 | 1.40 | 0.81 | â | 1045 | â | 450 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 1288* | â | â |
| Cavallo et al. | 2024 | 1.64 | 1.10 | â | 631 | 0.010 | â | â | â |
| Hunt & Reffert | 2023 | 1.60 | 0.59 | 0.20 | 944 | â | â | â | â |
| Almeida et al. | 2023 | 1.57 | 0.95 | â | 875 | 0.026 | 874* | 0.62 | â |
| Dias et al. | 2021 | 1.40 | 0.81 | â | 1045 | -0.027 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 1.75 | 0.72 | â | 977 | â | â | â | â |
| Cantat-Gaudin & Anders | 2020 | 1.65 | â | â | â | â | â | â | â |
| Liu & Pang | 2019 | â | â | â | 1450 | -0.250 | â | â | â |
| Soubiran et al. | 2018 | 1.65 | â | â | â | â | â | â | â |
| Cantat-Gaudin et al. | 2018 | 1.65 | â | â | â | â | â | â | â |
| Dias et al. | 2002 | 2.20 | 1.29 | â | 200 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: good fit. Silver sample.
Cavallo et al. (2024)
Gold sample.