Melotte 38

(Collinder 75; NGC 2099; MWSC 689; M 37; OCL 451; FSR 0818)

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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) 2002
Stellar density (N50/rad) 147.7 [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 38 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 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.

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

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Melotte 38 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 88.075 32.543 0.671 1.883 -5.621 6.916
Li et al. 2025 88.074 32.545 0.666 1.924 -5.648 –
Wei et al. 2025 88.081 32.544 0.669 1.875 -5.624 –
Carrasco-Varela et al. 2025 88.336 32.522 – – – –
Almeida et al. 2025 88.076 32.549 – – – –
Zhang et al. 2024 88.08 32.541 – – – –
Hunt & Reffert 2024 88.08 32.541 0.673 1.881 -5.624 6.778
Cavallo et al. 2024 88.075 32.536 0.673 – – –
Hunt & Reffert 2023 88.08 32.541 0.673 1.881 -5.624 6.778
Cordoni et al. 2023 88.076 32.549 0.665 1.933 -5.639 –
Just et al. 2023 88.079 32.571 – – – –
Tarricq et al. 2022 88.062 32.544 0.674 1.879 -5.617 –
Jaehnig et al. 2021 88.072 32.546 0.698 1.925 -5.635 –
Rain et al. 2021 88.074 32.545 0.666 1.924 -5.648 –
Dias et al. 2021 88.076 32.549 0.665 1.933 -5.639 11.634
Cantat-Gaudin et al. 2020 88.074 32.545 0.666 1.924 -5.648 –
SΓ‘nchez et al. 2020 88.075 32.553 – 2.1 -5.507 –
Cantat-Gaudin & Anders 2020 88.074 32.545 0.666 1.924 -5.648 –
Soubiran et al. 2018 88.074 32.545 – – – 8.03
Bica et al. 2019 88.076 32.549 – – – –
Cantat-Gaudin et al. 2018 88.074 32.545 0.666 1.924 -5.648 –
Loktin & Popova 2017 88.08 32.553 – 0.708 -0.196 7.7
Kharchenko et al. 2016 88.079 32.571 – – – –
Dias et al. 2014 88.075 32.553 – 2.08 -6.4 –
Kharchenko et al. 2013 88.087 32.57 – 2.92 -7.09 7.7
Gozha et al. 2012 88.075 32.553 – – – –
Kharchenko et al. 2012 88.087 32.57 – 2.92 -7.09 7.7
Piskunov et al. 2008 88.076 32.549 – – – –
Kharchenko et al. 2007 88.08 32.55 – 0.32 – –
Piskunov et al. 2007 88.076 32.549 – – – –
van den Bergh 2006 88.079 32.553 – – – –
Kharchenko et al. 2005 88.08 32.55 – 3.09 -7.35 –
Kharchenko et al. 2003 88.05 32.53 – 3.42 -6.61 –
Chen et al. 2003 88.1 32.525 – 3.36 -6.17 7.7
Dias et al. 2002 88.075 32.553 – 2.08 -6.4 8.3

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– 1.39 0.93 0.39 355 0.089 2661 0.41 0.01
Li et al. 2025 1.33 0.83 – 671 -0.047 – – –
Wei et al. 2025 1.76 0.77 – 576 0.250 3819 0.49 –
Carrasco-Varela et al. 2025 1.30 0.92 – 608 0.000 – – 0.01(1)
Almeida et al. 2025 1.30 0.92 – 608 – 5058 – –
Zhang et al. 2024 – – – – -0.144(1) – – –
Hunt & Reffert 2024 – – – – – 8682(1) – –
Cavallo et al. 2024 1.50 0.89 – 479 0.350 – – –
Hunt & Reffert 2023 1.39 0.62 0.39 485 – – – –
Cordoni et al. 2023 1.30 0.92 – 608 0.014 4410 0.33 0.00
Just et al. 2023 – – – 355 – 873 – –
Tarricq et al. 2022 1.38 – – 447 – – – –
Jaehnig et al. 2021 1.43(1) – – – – – – –
Rain et al. 2021 1.44 0.93 – 347 – – – 1
Dias et al. 2021 1.30 0.92 – 608 0.014 – – –
Cantat-Gaudin et al. 2020 1.43 0.75 – 447 – – – –
Cantat-Gaudin & Anders 2020 1.44 – – – – – – –
Soubiran et al. 2018 1.44 – – – – – – –
Cantat-Gaudin et al. 2018 1.44 – – – – – – –
Loktin & Popova 2017 1.41 0.93 – 346 – – – –
Kharchenko et al. 2016 1.40 1.08 – 355 – – – –
Kharchenko et al. 2013 1.40 1.08 – 355 0.089 – – –
Gozha et al. 2012 1.38 – – 347 0.140 724 – –
Kharchenko et al. 2012 1.40 1.08 – 355 0.089 – – –
Piskunov et al. 2008 1.38 0.93 – 347 – 1503(1) – –
Piskunov et al. 2007 1.38 0.93 – 347 – 382 – –
van den Bergh 2006 1.38 0.93 – 347 – – – –
Kharchenko et al. 2005 1.38 0.93 – 347 – – – –
Kharchenko et al. 2003 1.39 0.93 – – – – – –
Chen et al. 2003 1.38 0.94 – 340 0.090(1) – – –
Dias et al. 2002 1.38 0.94 – 347 0.089 – – –

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

Visualization
ℹ️
Melotte 38 UCC
Melotte 38 HUNT23
Melotte 38 CANTAT20
Galactocentric position diagram