Melotte 75

(Collinder 159; NGC 2437; MWSC 1313; M 46; OCL 601; FSR 1241; FoF 587)

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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) 2014
Stellar density (N50/rad) 66.3 [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
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 MOCAMOCA πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
Melotte 75 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by low extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the mass parameter (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 a later reported entry. See table with shared members information.

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

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Melotte 75 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 115.446 -14.844 0.596 -3.867 0.399 46.435
Li et al. 2025 115.445 -14.844 0.603 -3.838 0.365 –
Wei et al. 2025 115.45 -14.837 0.599 -3.86 0.392 –
Almeida et al. 2025 115.436 -14.915 – – – –
Hunt & Reffert 2024 115.46 -14.834 0.599 -3.871 0.407 44.668
Cavallo et al. 2024 115.442 -14.843 0.6 – – –
Hunt & Reffert 2023 115.46 -14.834 0.599 -3.871 0.407 44.668
Just et al. 2023 115.449 -14.803 – – – –
Tarricq et al. 2022 115.459 -14.848 0.579 -3.86 0.4 –
Jaehnig et al. 2021 115.446 -14.845 0.635 -3.832 0.365 –
Rain et al. 2021 115.445 -14.844 0.603 -3.838 0.365 –
Dias et al. 2021 115.436 -14.915 0.609 -3.837 0.371 54.544
Cantat-Gaudin et al. 2020 115.445 -14.844 0.603 -3.838 0.365 –
SΓ‘nchez et al. 2020 115.442 -14.81 – -3.913 0.334 –
Cantat-Gaudin & Anders 2020 115.445 -14.844 0.603 -3.838 0.365 –
Liu & Pang 2019 115.433 -14.841 0.615 -3.827 0.364 –
Soubiran et al. 2018 115.445 -14.844 – – – 49.04
Bica et al. 2019 115.425 -14.811 – – – –
Cantat-Gaudin et al. 2018 115.445 -14.844 0.603 -3.838 0.365 –
Loktin & Popova 2017 115.44 -14.809 – -2.923 -0.155 30.4
Kharchenko et al. 2016 115.449 -14.803 – – – –
Dias et al. 2014 115.442 -14.81 – -2.6 0.09 –
Kharchenko et al. 2013 115.455 -14.805 – -3.05 0.38 30.4
Gozha et al. 2012 115.442 -14.81 – – – –
Piskunov et al. 2008 115.425 -14.81 – – – –
Kharchenko et al. 2007 115.44 -14.81 – 0.38 – 48.09
Piskunov et al. 2007 115.425 -14.81 – – – –
van den Bergh 2006 115.425 -14.817 – – – –
Kharchenko et al. 2005 115.42 -14.81 – -4.22 1.2 48.09
Kharchenko et al. 2003 115.42 -14.81 – -3.88 1.22 –
Chen et al. 2003 115.474 -14.824 – -3.17 -0.12 48.1
Dias et al. 2002 115.442 -14.81 – -3.66 0.28 49.2

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– 1.51 0.46 0.9 251 0.060 1607 0.8 1.0
Li et al. 2025 1.70 0.32 – 467 0.250 – – –
Wei et al. 2025 2.03 0.61 – 275 0.250 3621 0.80 –
Almeida et al. 2025 1.52 0.44 – 512 – 2552 – –
Hunt & Reffert 2024 – – – – – 7903(1) – –
Cavallo et al. 2024 1.64 0.50 – 417 0.300 – – –
Hunt & Reffert 2023 1.55 0.27 0.90 432 – – – –
Just et al. 2023 – – – 224 – 1549 – –
Tarricq et al. 2022 1.47 – – 316 – – – –
Jaehnig et al. 2021 1.57(1) – – – – – – –
Rain et al. 2021 1.58 0.31 – 251 – – – 1
Dias et al. 2021 1.52 0.44 – 512 0.011 – – –
Cantat-Gaudin et al. 2020 1.51 0.73 – 302 – – – –
Cantat-Gaudin & Anders 2020 1.58 – – – – – – –
Liu & Pang 2019 – – – 186 0.250 – – –
Soubiran et al. 2018 1.58 – – – – – – –
Cantat-Gaudin et al. 2018 1.58 – – – – – – –
Loktin & Popova 2017 1.44 0.47 – 252 – – – –
Kharchenko et al. 2016 1.38 0.46 – 224 – – – –
Kharchenko et al. 2013 1.38 0.46 – 224 -0.470 – – –
Gozha et al. 2012 1.51 – – 251 0.060 1514 – –
Piskunov et al. 2008 1.38 0.46 – 145 – 1607(1) – –
Piskunov et al. 2007 1.38 0.46 – 145 – 453 – –
van den Bergh 2006 1.38 0.46 – 245 – – – –
Kharchenko et al. 2005 1.38 0.46 – 145 – – – –
Kharchenko et al. 2003 1.37 0.46 – – – – – –
Chen et al. 2003 1.38 0.48 – 240 0.050(1) – – –
Dias et al. 2002 1.51 0.31 – 251 0.059 – – –

(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 14041 1.2 115.74 -14.74 0.57 -3.92 0.43 34.59 0.0

πŸ’‘ Note: The % column shows the percentage of members that Melotte 75 shares with each listed object.

Visualization
ℹ️
Melotte 75 UCC
Melotte 75 HUNT23
Melotte 75 CANTAT20
Galactocentric position diagram