Collinder 307

(MWSC 2427; FoF 863)

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0.91 UTI
0.81
CN
1.0
Cdens
1.0
CC3
0.87
Clit
1.0
Cdup
N50 (P>50% members) 256
Stellar density (N50/rad) 51.0 [N/pc2]
C3 classification AA
  • CN 0.81 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.87 Well-studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 MOCAMOCA πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
Collinder 307 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 moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age, metallicity, and mass parameters (see Parameters). It is well-studied in the literature.

Cavallo et al. (2024)
Gold sample.

Almeida et al. (2025)
Mass determination: good fit. Isochrone match: good fit. Gold sample.

Data
πŸ” Search references for Collinder 307 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 248.785 -50.989 0.506 -0.761 -3.324 -41.949
Almeida et al. 2025 248.794 -50.989 – – – –
Hunt & Reffert 2024 248.793 -50.985 0.508 -0.763 -3.331 -35.337
Cavallo et al. 2024 248.788 -50.984 0.511 – – –
Hunt & Reffert 2023 248.793 -50.985 0.508 -0.763 -3.331 -35.337
Almeida et al. 2023 248.792 -50.999 – – – –
Just et al. 2023 248.822 -50.989 – – – –
Dias et al. 2021 248.794 -50.989 0.482 -0.713 -3.33 –
Cantat-Gaudin et al. 2020 248.792 -50.99 0.484 -0.715 -3.339 –
SΓ‘nchez et al. 2020 248.833 -51.0 – -0.704 -3.032 –
Cantat-Gaudin & Anders 2020 248.792 -50.99 0.484 -0.715 -3.339 –
Liu & Pang 2019 248.808 -50.999 0.491 -0.741 -3.316 –
Cantat-Gaudin et al. 2018 248.792 -50.99 0.484 -0.715 -3.339 –
Kharchenko et al. 2016 248.822 -50.989 – – – –
Dias et al. 2014 248.833 -51.0 – -0.55 -3.5 –
Kharchenko et al. 2013 248.833 -50.99 – -3.41 -0.04 –
Bukowiecki et al. 2011 248.863 -50.982 – – – –
Dias et al. 2002 248.833 -51.0 – -0.65 -3.69 –

πŸ’‘ 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] Bfrac BSS
UCC 99999– 1.95 2.58 1.89 164 0.227 764 0.61 –
Almeida et al. 2025 1.68 2.55 – 82 – 764 – –
Hunt & Reffert 2024 – – – – – 1707(1) – –
Cavallo et al. 2024 2.23 2.72 – 257 0.830 – – –
Hunt & Reffert 2023 1.84 2.71 1.89 187 – – – –
Almeida et al. 2023 1.70 2.59 – 142 0.171 713(1) 0.61 –
Just et al. 2023 – – – 18 – 211 – –
Dias et al. 2021 1.68 2.55 – 82 0.203 – – –
Cantat-Gaudin et al. 2020 2.10 2.11 – 245 – – – –
Cantat-Gaudin & Anders 2020 1.95 – – – – – – –
Liu & Pang 2019 – – – 576 0.250 – – –
Cantat-Gaudin et al. 2018 1.95 – – – – – – –
Kharchenko et al. 2016 2.06 3.61 – 18 – – – –
Kharchenko et al. 2013 2.06 3.61 – 18 – – – –
Bukowiecki et al. 2012 – – – – – 1555 – –
Bukowiecki et al. 2011 2.15(1) 2.48 – 251 – – – –
Dias et al. 2002 1.55 2.57 – 251 – – – –

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization
ℹ️
Collinder 307 UCC
Collinder 307 HUNT23
Collinder 307 CANTAT20
Galactocentric position diagram