Melotte 23

(Collinder 47; NGC 1528; MWSC 353; OCL 397; FoF 2138)

Click to load Aladin Lite
0.97 UTI
0.87
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 419
Stellar density (N50/rad) 31.5 [N/pc2]
C3 classification AA
  • CN 0.87 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 23 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a 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.

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

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Melotte 23 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 63.877 51.21 0.966 2.138 -2.278 -12.626
Li et al. 2025 63.878 51.218 0.948 2.181 -2.246 –
Almeida et al. 2025 63.862 51.229 – – – –
Zhang et al. 2024 63.906 51.195 – – – –
Hunt & Reffert 2024 63.906 51.195 0.964 2.149 -2.304 -12.024
Cavallo et al. 2024 63.836 51.233 0.967 – – –
Hunt & Reffert 2023 63.906 51.195 0.964 2.149 -2.304 -12.024
Almeida et al. 2023 63.853 51.242 – – – –
Cordoni et al. 2023 63.862 51.229 0.945 2.182 -2.25 –
Just et al. 2023 63.836 51.19 – – – –
He et al. 2022 63.859 51.219 0.972 2.128 -2.298 –
Tarricq et al. 2022 63.89 51.221 0.986 2.133 -2.273 –
Jaehnig et al. 2021 63.867 51.211 0.984 2.18 -2.218 –
Rain et al. 2021 63.878 51.218 0.948 2.181 -2.246 –
Dias et al. 2021 63.862 51.229 0.945 2.182 -2.25 -9.533
Cantat-Gaudin et al. 2020 63.878 51.218 0.948 2.181 -2.246 –
SΓ‘nchez et al. 2020 63.846 51.215 – 2.227 -2.174 –
Cantat-Gaudin & Anders 2020 63.878 51.218 0.948 2.181 -2.246 –
Liu & Pang 2019 63.874 51.216 0.958 2.161 -2.232 –
Bossini et al. 2019 63.878 51.218 – – – –
Soubiran et al. 2018 63.878 51.218 – – – -9.62
Bica et al. 2019 63.852 51.229 – – – –
Cantat-Gaudin et al. 2018 63.878 51.218 0.948 2.181 -2.246 –
Loktin & Popova 2017 63.84 51.216 – -2.074 1.13 -9.2
Kharchenko et al. 2016 63.836 51.19 – – – –
Dias et al. 2014 63.846 51.215 – 0.9 -1.08 –
Kharchenko et al. 2013 63.847 51.19 – 1.2 -1.38 -9.2
Gozha et al. 2012 63.846 51.215 – – – –
Kharchenko et al. 2012 63.847 51.19 – 1.2 -1.38 -9.15
Piskunov et al. 2008 63.829 51.214 – – – –
Kharchenko et al. 2007 63.84 51.22 – 0.44 – -10.3
Piskunov et al. 2007 63.829 51.214 – – – –
van den Bergh 2006 63.85 51.217 – – – –
Kharchenko et al. 2005 63.84 51.22 – 1.67 -2.46 –
Kharchenko et al. 2003 63.85 51.2 – 2.02 -1.39 –
Chen et al. 2003 63.827 51.285 – 1.81 -2.44 -10.3
Dias et al. 2002 63.846 51.215 – 0.9 -1.08 -16.9

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– 0.97 0.81 1.02 355 0.007 770 0.38 0.0
Li et al. 2025 0.94 0.90 – 470 -0.043 – – –
Almeida et al. 2025 0.97 1.00 – 385 – 892 – –
Zhang et al. 2024 – – – – -0.131(1) – – –
Hunt & Reffert 2024 – – – – – 1346(1) – –
Cavallo et al. 2024 1.05 0.90 – 437 0.460 – – –
Hunt & Reffert 2023 0.98 0.92 1.02 209 – – – –
Almeida et al. 2023 0.99 1.15 – 347 0.007 925(1) 0.46 –
Cordoni et al. 2023 0.97 1.00 – 385 0.117 1075 0.30 0.00
Just et al. 2023 – – – 355 – 184 – –
He et al. 2022 – 1.20 – 251 – – – –
Tarricq et al. 2022 1.04 – – 309 – – – –
Jaehnig et al. 2021 1.01(1) – – – – – – –
Rain et al. 2021 1.02 0.78 – 389 – – – 0
Dias et al. 2021 0.97 1.00 – 385 0.117 – – –
Cantat-Gaudin et al. 2020 1.07 0.82 – 295 – – – –
Cantat-Gaudin & Anders 2020 1.02 – – – – – – –
Liu & Pang 2019 – – – 288 0.250 – – –
Bossini et al. 2019 0.99 0.79 – 394 0.000 – – –
Soubiran et al. 2018 1.02 – – – – – – –
Cantat-Gaudin et al. 2018 1.02 – – – – – – –
Loktin & Popova 2017 0.80 0.82 – 344 – – – –
Kharchenko et al. 2016 0.95 0.78 – 355 – – – –
Kharchenko et al. 2013 0.95 0.78 – 355 – – – –
Gozha et al. 2012 1.09 – – 398 -0.130 479 – –
Kharchenko et al. 2012 0.95 0.78 – 355 – – – –
Piskunov et al. 2008 0.78 0.74 – 269 – 647(1) – –
Piskunov et al. 2007 0.78 0.74 – 269 – 239 – –
van den Bergh 2006 0.78 0.81 – 372 – – – –
Kharchenko et al. 2005 0.78 0.74 – 269 – – – –
Kharchenko et al. 2003 0.78 0.81 – – – – – –
Chen et al. 2003 0.78 – – 360 – – – –
Dias et al. 2002 1.09 0.81 – 398 – – – –

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

Visualization
ℹ️
Melotte 23 UCC
Melotte 23 HUNT23
Melotte 23 CANTAT20
Galactocentric position diagram