Melotte 94

(Collinder 204; NGC 2682; MWSC 1585; Messier 67; M 67; OCL 549)

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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) 1650
Stellar density (N50/rad) 87.4 [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 94 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 low extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the absorption, metallicity, 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.

Note: This object shares a very small percentage of members with at least one entry reported in the same catalogue. See table with shared members information.

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

Cavallo et al. (2024)
Gold sample.

Rain et al. (2024)
Many BSSs are known binaries, consistent with their close match to binary evolution tracks. Two YSSs are also present and interpreted as evolved binary systems.

Data
🔍 Search references for Melotte 94 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 132.847 11.818 1.152 -10.97 -2.914 33.912
Nizovkina et al. 2025 132.85 11.817 – – – –
Li et al. 2025 132.846 11.814 1.135 -10.986 -2.964 –
Hu & Soubiran 2025 132.839 11.827 – – – –
Wei et al. 2025 132.846 11.824 1.153 -10.976 -2.919 –
Carrasco-Varela et al. 2025 133.07 11.731 – – – –
Almeida et al. 2025 132.848 11.814 – – – –
Alfonso et al. 2024 132.845 11.822 1.112 -10.971 -2.922 –
Zhang et al. 2024 132.85 11.817 – – – –
Hunt & Reffert 2024 132.85 11.817 1.15 -10.965 -2.906 33.767
Cavallo et al. 2024 132.839 11.827 1.151 – – –
Rain et al. 2024 132.846 11.82 1.152 -10.971 -2.913 –
Hunt & Reffert 2023 132.85 11.817 1.15 -10.965 -2.906 33.767
Almeida et al. 2023 132.835 11.813 – – – –
Cordoni et al. 2023 132.848 11.814 1.138 -11.001 -2.963 –
Just et al. 2023 132.84 11.818 – – – –
He et al. 2022 132.845 11.819 1.153 -10.972 -2.922 –
Tarricq et al. 2022 132.855 11.813 1.15 -10.969 -2.919 –
Jaehnig et al. 2021 132.843 11.818 1.162 -10.962 -2.955 –
Rain et al. 2021 132.846 11.814 1.135 -10.986 -2.964 –
Dias et al. 2021 132.848 11.814 1.138 -11.001 -2.963 34.045
Cantat-Gaudin et al. 2020 132.846 11.814 1.135 -10.986 -2.964 –
Donor et al. 2020 132.847 11.815 – -11.05 -2.98 33.9
Cantat-Gaudin & Anders 2020 132.846 11.814 1.135 -10.986 -2.964 –
Bossini et al. 2019 132.846 11.814 – – – –
Soubiran et al. 2018 132.846 11.814 – – – 33.8
Bica et al. 2019 132.847 11.834 – – – –
Cantat-Gaudin et al. 2018 132.846 11.814 1.135 -10.986 -2.964 –
Angelo et al. 2019 132.838 11.813 – – – –
Loktin & Popova 2017 132.825 11.801 – -9.4 -4.87 33.6
Kharchenko et al. 2016 132.84 11.818 – – – –
Dias et al. 2014 132.825 11.8 – -9.4 -4.87 –
Kharchenko et al. 2013 132.847 11.815 – -7.31 -5.92 33.6
Gozha et al. 2012 132.825 11.8 – – – –
Piskunov et al. 2008 132.849 11.807 – – – –
Kharchenko et al. 2007 132.82 11.8 – 0.31 – 32.3
Piskunov et al. 2007 132.849 11.807 – – – –
van den Bergh 2006 132.825 11.8 – – – –
Kharchenko et al. 2005 132.85 11.8 – -8.31 -4.81 32.3
Kharchenko et al. 2003 132.87 11.84 – -8.83 -4.96 –
Chen et al. 2003 132.716 11.813 – -6.47 -6.27 33.6
Dias et al. 2002 132.825 11.8 – -9.4 -4.87 33.62

💡 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– 0.86 0.13 0.56 3428 0.013 1327 0.37 0.1
Nizovkina et al. 2025 0.83(4) 0.12(4) – 4188(4) -0.041(4) – – –
Li et al. 2025 0.85 0.13 – 4130 -0.018 – – –
Hu & Soubiran 2025 – – – – -0.160(5) – – –
Wei et al. 2025 0.78 0.00 – 2050 0.250 1750 0.26 –
Carrasco-Varela et al. 2025 0.86 0.13 – 3758 0.150 – – 0.10(1)
Almeida et al. 2025 0.86 0.13 – 3758 – 1327 – –
Alfonso et al. 2024 0.89 0.07 – 3590 0.073 – – –
Zhang et al. 2024 – – – – 0.013(1) – – –
Hunt & Reffert 2024 – – – – – 2779(1) – –
Cavallo et al. 2024 0.85 0.18 – 2512 0.320 – – –
Rain et al. 2024 0.80 0.08 – 5208 – 7437 0.24 –
Hunt & Reffert 2023 0.82 0.10 0.56 1687 – – – –
Almeida et al. 2023 0.84 0.16 – 3784 -0.045 1843(1) 0.56 –
Cordoni et al. 2023 0.86 0.13 – 3758 0.072 1083 0.48 0.03
Just et al. 2023 – – – 3428 – 1675 – –
He et al. 2022 – 0.10 – 4467 – – – –
Tarricq et al. 2022 0.87 – – 4169 – – – –
Jaehnig et al. 2021 0.86(1) – – – – – – –
Rain et al. 2021 0.86 0.09 – 2818 – – – 11
Dias et al. 2021 0.86 0.13 – 3758 0.072 – – –
Cantat-Gaudin et al. 2020 0.89 0.07 – 4266 – – – –
Donor et al. 2020 – – – – 0.010 – – –
Cantat-Gaudin & Anders 2020 0.86 – – – – – – –
Bossini et al. 2019 0.88 0.12 – 3639 0.000 – – –
Soubiran et al. 2018 0.86 – – – – – – –
Cantat-Gaudin et al. 2018 0.86 – – – – – – –
Angelo et al. 2019 0.85 – – 3550 – 772 – –
Loktin & Popova 2017 0.91 0.18 – 2564 – – – –
Kharchenko et al. 2016 0.89 0.16 – 3428 – – – –
Kharchenko et al. 2013 0.89 0.16 – 3428 -0.102 – – –
Gozha et al. 2012 0.91 – – 2564 0.030 135 – –
Piskunov et al. 2008 0.91 0.19 – 2570 – 279(1) – –
Piskunov et al. 2007 0.91 0.19 – 2570 – 83 – –
van den Bergh 2006 0.91 0.19 – 2570 – – – –
Kharchenko et al. 2005 0.91 0.19 – 2570 – – – –
Kharchenko et al. 2003 0.91 0.19 – – – – – –
Chen et al. 2003 0.91 0.18 – 2560 0.000(1) – – –
Dias et al. 2002 0.81 0.09 – 2818 0.030 – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
CWWDL 14090 60.4 132.84 11.82 1.15 -10.98 -2.91 33.79 0.0
Chupina 1 1.6 132.62 11.9 1.16 -10.99 -2.99 34.59 0.48
Chupina 2 1.5 132.64 12.26 1.14 -11.01 -2.96 33.83 0.4
Chupina 3 1.5 132.85 11.41 1.15 -11.04 -2.83 34.39 0.45
Chupina 4 1.5 133.01 12.34 1.15 -10.93 -2.95 33.99 0.35
Chupina 5 1.5 133.19 11.87 1.15 -10.96 -2.87 34.33 0.43
NGC 2678 1.4 132.58 11.36 1.05 -10.92 -2.82 35.48 0.28

💡 Note: The % column shows the percentage of members that Melotte 94 shares with each listed object.

Visualization
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Melotte 94 UCC
Melotte 94 HUNT23
Melotte 94 CANTAT20
Galactocentric position diagram