Melotte 24

(Collinder 48; IC 361; MWSC 362; OCL 393; FSR 0652; FoF 615)

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0.95 UTI
1.0
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 1195
Radius (P>50% members) 4.4 [arcmin]
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
Melotte 24 is a very rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a massive, 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.

Distant Moderate extinction Massive Near-solar metallicity Intermediate age Contains BSS

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

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Melotte 24 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 64.737 58.252 0.252 1.683 -1.175 -35.613
Li et al. 2025 64.736 58.252 0.227 1.721 -1.139 –
Hu & Soubiran 2025 64.742 58.252 – – – –
Almeida et al. 2025 64.738 58.258 – – – –
Hunt & Reffert 2024 64.733 58.251 0.25 1.693 -1.183 -35.713
Cavallo et al. 2024 64.742 58.252 0.251 – – –
Hunt & Reffert 2023 64.733 58.251 0.25 1.693 -1.183 -35.713
Almeida et al. 2023 64.742 58.252 – – – –
Just et al. 2023 64.727 58.249 – – – –
Jaehnig et al. 2021 64.739 58.252 0.254 1.712 -1.136 –
Rain et al. 2021 64.736 58.252 0.227 1.721 -1.139 –
Dias et al. 2021 64.738 58.258 0.231 1.753 -1.132 -29.978
Cantat-Gaudin et al. 2020 64.736 58.252 0.227 1.721 -1.139 –
SΓ‘nchez et al. 2020 64.75 58.3 – 1.648 -1.184 –
Cantat-Gaudin & Anders 2020 64.736 58.252 0.227 1.721 -1.139 –
Liu & Pang 2019 64.711 58.27 0.27 1.666 -1.116 –
Soubiran et al. 2018 64.736 58.252 – – – -37.9
Bica et al. 2019 64.731 58.253 – – – –
Cantat-Gaudin et al. 2018 64.736 58.252 0.227 1.721 -1.139 –
Loktin & Popova 2017 64.74 58.25 – 4.91 -5.504 –
Kharchenko et al. 2016 64.727 58.249 – – – –
Dias et al. 2014 64.75 58.3 – 1.28 -2.52 –
Kharchenko et al. 2013 64.74 58.25 – 5.76 -5.44 –
Kharchenko et al. 2012 64.74 58.25 – 5.76 -5.44 –
van den Bergh 2006 64.75 58.3 – – – –
Dias et al. 2002 64.75 58.3 – 1.28 -2.52 –

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] Bfr BSS
Li et al. 2025 3.51 2.22 – 1171 -0.142 – – –
Hu & Soubiran 2025 – – – – -0.100* – – –
Almeida et al. 2025 3.41 2.33 – 1151 – 5043 – –
Hunt & Reffert 2024 – – – – – 7743* – –
Cavallo et al. 2024 3.22 2.48 – 1000 -0.100 – – –
Hunt & Reffert 2023 3.60 2.05 0.87 804 – – – –
Almeida et al. 2023 3.38 2.37 – 1033 -0.229 2459* 0.81 –
Just et al. 2023 – – – 959 – 1346 – –
Jaehnig et al. 2021 4.02* – – – – – – –
Rain et al. 2021 3.91 3.44 – 51 – – – 2
Dias et al. 2021 3.41 2.33 – 1151 -0.248 – – –
Cantat-Gaudin et al. 2020 3.58 1.92 – 813 – – – –
Cantat-Gaudin & Anders 2020 3.91 – – – – – – –
Liu & Pang 2019 – – – 1410 0.250 – – –
Soubiran et al. 2018 3.91 – – – – – – –
Cantat-Gaudin et al. 2018 3.91 – – – – – – –
Loktin & Popova 2017 1.86 2.84 – 141 – – – –
Kharchenko et al. 2016 3.00 2.02 – 959 – – – –
Kharchenko et al. 2013 3.00 2.02 – 959 – – – –
Kharchenko et al. 2012 3.00 2.02 – 959 – – – –
van den Bergh 2006 1.07 3.47 – 52 – – – –
Dias et al. 2002 1.07 3.46 – 52 – – – –

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization
ℹ️
Melotte 24 UCC
Melotte 24 HUNT23
Melotte 24 CANTAT20
Galactocentric position diagram