Collinder 308

(NGC 6178; MWSC 2428; OCL 980; ESO 276 06)

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0.90 UTI
0.76
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 126
Stellar density (N50/rad) 20.4 [N/pc2]
C3 classification AB
  • CN 0.76 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
Collinder 308 is a rich, very dense object of high C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Collinder 308 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 248.936 -45.628 1.113 0.444 -3.367 -9.156
Li et al. 2025 248.939 -45.635 1.099 0.521 -3.342 –
Wei et al. 2025 248.951 -45.549 1.124 0.436 -3.329 –
Almeida et al. 2025 248.933 -45.646 – – – –
Alfonso et al. 2024 249.034 -45.413 1.072 0.433 -3.306 –
Hunt & Reffert 2024 248.929 -45.651 1.095 0.511 -3.27 -7.493
Celli et al. 2024 248.939 -45.635 – – – –
Cavallo et al. 2024 249.082 -45.453 1.098 – – –
Hunt & Reffert 2023 248.929 -45.651 1.095 0.511 -3.27 -7.493
Almeida et al. 2023 248.934 -45.641 – – – –
Just et al. 2023 248.936 -45.625 – – – –
He et al. 2022 248.931 -45.637 1.111 0.412 -3.374 –
Jaehnig et al. 2021 248.927 -45.621 1.15 0.488 -3.327 –
Rain et al. 2021 248.939 -45.635 1.099 0.521 -3.342 –
Dias et al. 2021 248.933 -45.646 1.091 0.436 -3.316 –
Cantat-Gaudin et al. 2020 248.939 -45.635 1.099 0.521 -3.342 –
Cantat-Gaudin & Anders 2020 248.939 -45.635 1.099 0.521 -3.342 –
Bica et al. 2019 248.942 -45.647 – – – –
Cantat-Gaudin et al. 2018 248.939 -45.635 1.099 0.521 -3.342 –
Loktin & Popova 2017 248.94 -45.644 – -0.74 -3.699 3.5
Kharchenko et al. 2016 248.936 -45.625 – – – –
Dias et al. 2014 248.946 -45.643 – -0.79 -0.82 –
Kharchenko et al. 2013 248.947 -45.625 – 0.38 -3.6 3.5
Gozha et al. 2012 248.946 -45.643 – – – –
Piskunov et al. 2008 248.931 -45.641 – – – –
Kharchenko et al. 2007 248.94 -45.64 – 0.16 – 3.54
van den Bergh 2006 248.95 -45.633 – – – –
Kharchenko et al. 2005 248.94 -45.64 – 1.17 -2.04 3.54
Kharchenko et al. 2003 248.94 -45.63 – 0.53 -3.13 –
Chen et al. 2003 248.953 -45.654 – 0.62 -2.06 4.5
Dias et al. 2002 248.946 -45.643 – 0.62 -2.06 3.55
Dambis 1999 248.946 -45.643 – – – –

💡 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– 0.92 0.715 1.8 17 0.013 138 0.535 0.0
Li et al. 2025 0.75 0.72 – 16 -0.273 – – –
Wei et al. 2025 0.93 1.30 – 6 0.000 381 0.64 –
Almeida et al. 2025 0.84 0.84 – 13 – 131 – –
Alfonso et al. 2024 0.91 0.52 – 17 0.068 – – –
Hunt & Reffert 2024 – – – – – 406(1) – –
Celli et al. 2024 – – – 17 – 176 – –
Cavallo et al. 2024 0.93 1.21 – 6 -0.100 – – –
Hunt & Reffert 2023 0.87 0.79 1.80 8 – – – –
Almeida et al. 2023 0.85 0.87 – 13 0.026 122(1) 0.43 –
Just et al. 2023 – – – 32 – 60 – –
He et al. 2022 – 0.85 – 8 – – – –
Jaehnig et al. 2021 0.87(1) – – – – – – –
Rain et al. 2021 0.89 0.65 – 17 – – – 0
Dias et al. 2021 0.84 0.84 – 13 0.068 – – –
Cantat-Gaudin et al. 2020 0.91 0.52 – 17 – – – –
Cantat-Gaudin & Anders 2020 0.89 – – – – – – –
Cantat-Gaudin et al. 2018 0.89 – – – – – – –
Loktin & Popova 2017 1.01 0.68 – 17 – – – –
Kharchenko et al. 2016 1.01 0.74 – 32 – – – –
Kharchenko et al. 2013 1.01 0.74 – 32 – – – –
Gozha et al. 2012 1.01 – – 18 – 138 – –
Piskunov et al. 2008 1.01 0.68 – 32 – – – –
van den Bergh 2006 1.01 0.68 – 18 – – – –
Kharchenko et al. 2005 1.01 0.68 – 32 – – – –
Kharchenko et al. 2003 1.01 0.68 – – – – – –
Chen et al. 2003 1.01 – – 10 – – – –
Dias et al. 2002 1.01 0.68 – 18 – – – –
Dambis 1999 0.88 0.71 – 50 – – – –

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

Visualization
ℹī¸
Collinder 308 UCC
Collinder 308 HUNT23
Collinder 308 CANTAT20
Galactocentric position diagram