Melotte 145

(Collinder 301; NGC 6124; MWSC 2403; OCL 990; ESO 331 03; FoF 2347)

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1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 1504
Stellar density (N50/rad) 137.5 [N/pc2]
C3 classification AA
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very 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¸
Melotte 145 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a close distance, above 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 and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object contains blue stragglers according to at least one source.

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Melotte 145 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 246.313 -40.657 1.592 -0.227 -2.102 -21.857
Li et al. 2025 246.332 -40.661 1.557 -0.203 -2.094 –
Wei et al. 2025 246.319 -40.655 1.595 -0.224 -2.118 –
Almeida et al. 2025 246.359 -40.684 – – – –
Alfonso et al. 2024 246.325 -40.651 1.556 -0.215 -2.112 –
Hunt & Reffert 2024 246.296 -40.673 1.597 -0.222 -2.119 -21.331
Cavallo et al. 2024 246.315 -40.66 1.596 – – –
Hunt & Reffert 2023 246.296 -40.673 1.597 -0.222 -2.119 -21.331
Just et al. 2023 246.305 -40.65 – – – –
He et al. 2022 246.308 -40.659 1.599 -0.22 -2.099 –
Tarricq et al. 2022 246.305 -40.663 1.604 -0.214 -2.133 –
Jaehnig et al. 2021 246.309 -40.658 1.589 -0.23 -2.118 –
Rain et al. 2021 246.332 -40.661 1.557 -0.203 -2.094 –
Dias et al. 2021 246.359 -40.684 1.556 -0.2 -2.059 -20.531
Cantat-Gaudin et al. 2020 246.332 -40.661 1.557 -0.203 -2.094 –
Cantat-Gaudin & Anders 2020 246.332 -40.661 1.557 -0.203 -2.094 –
Liu & Pang 2019 246.313 -40.649 1.554 -0.211 -2.091 –
Soubiran et al. 2018 246.332 -40.661 – – – -20.8
Bica et al. 2019 246.348 -40.665 – – – –
Cantat-Gaudin et al. 2018 246.332 -40.661 1.557 -0.203 -2.094 –
Loktin & Popova 2017 246.33 -40.654 – -1.26 -3.0 -21.1
Kharchenko et al. 2016 246.305 -40.65 – – – –
Dias et al. 2014 246.333 -40.653 – -1.22 1.3 –
Kharchenko et al. 2013 246.315 -40.65 – -0.5 -2.65 -21.1
Gozha et al. 2012 246.333 -40.653 – – – –
Piskunov et al. 2008 246.32 -40.644 – – – –
Piskunov et al. 2007 246.32 -40.644 – – – –
van den Bergh 2006 246.325 -40.65 – – – –
Kharchenko et al. 2005 246.33 -40.65 – -0.27 -2.67 –
Kharchenko et al. 2003 246.33 -40.65 – -1.42 -3.42 –
Dias et al. 2002 246.333 -40.653 – -1.26 -3.0 -21.07

💡 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– 0.605 2.33 2.58 140 0.202 352 0.57 2.0
Li et al. 2025 0.58 2.26 – 266 0.051 – – –
Wei et al. 2025 1.55 2.59 – 93 0.250 2618 0.57 –
Almeida et al. 2025 0.62 2.33 – 101 – 3943 – –
Alfonso et al. 2024 0.66 1.93 – 212 0.152 – – –
Hunt & Reffert 2024 – – – – – 5510(1) – –
Cavallo et al. 2024 0.66 2.51 – 102 0.320 – – –
Hunt & Reffert 2023 0.59 2.53 2.58 78 – – – –
Just et al. 2023 – – – 193 – 119 – –
He et al. 2022 – 2.75 – 79 – – – –
Tarricq et al. 2022 0.65 – – 200 – – – –
Jaehnig et al. 2021 0.63(1) – – – – – – –
Rain et al. 2021 0.63 2.33 – 138 – – – 2
Dias et al. 2021 0.62 2.33 – 101 0.154 – – –
Cantat-Gaudin et al. 2020 0.65 1.93 – 191 – – – –
Cantat-Gaudin & Anders 2020 0.63 – – – – – – –
Liu & Pang 2019 – – – 85 0.250 – – –
Soubiran et al. 2018 0.63 – – – – – – –
Cantat-Gaudin et al. 2018 0.63 – – – – – – –
Loktin & Popova 2017 0.51 2.33 – 139 – – – –
Kharchenko et al. 2016 0.56 2.03 – 193 – – – –
Kharchenko et al. 2013 0.56 2.03 – 193 – – – –
Gozha et al. 2012 0.51 – – 140 – 219 – –
Piskunov et al. 2008 0.47 2.11 – 219 – 352(1) – –
Piskunov et al. 2007 0.47 2.11 – 219 – 87 – –
van den Bergh 2006 0.51 2.33 – 141 – – – –
Kharchenko et al. 2005 0.47 2.11 – 219 – – – –
Kharchenko et al. 2003 0.51 2.33 – – – – – –
Dias et al. 2002 0.51 2.33 – 140 – – – –

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

Visualization
ℹī¸
Melotte 145 UCC
Melotte 145 HUNT23
Melotte 145 CANTAT20
Galactocentric position diagram