Melotte 128

(Collinder 286; VDBH 163; NGC 5715; MWSC 2245; OCL 929; vdBergh-Hagen 163; ESO 176 02; FoF 431)

Click to load Aladin Lite
0.96 UTI
0.82
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 276
Stellar density (N50/rad) 55.4 [N/pc2]
C3 classification AA
  • CN 0.82 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 128 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object shares a 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: intermediate fit. Silver sample.

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Melotte 128 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 220.855 -57.578 0.456 -3.468 -2.303 -26.834
Li et al. 2025 220.859 -57.578 0.435 -3.487 -2.324 –
Hu & Soubiran 2025 220.849 -57.576 – – – –
Almeida et al. 2025 220.863 -57.575 – – – –
Hunt & Reffert 2024 220.87 -57.578 0.459 -3.461 -2.301 -27.613
Cavallo et al. 2024 220.849 -57.576 0.462 – – –
Hunt & Reffert 2023 220.87 -57.578 0.459 -3.461 -2.301 -27.613
Almeida et al. 2023 220.874 -57.58 – – – –
Just et al. 2023 220.863 -57.564 – – – –
Dias et al. 2021 220.863 -57.575 0.437 -3.49 -2.301 -26.1
Cantat-Gaudin et al. 2020 220.859 -57.578 0.435 -3.487 -2.324 –
SΓ‘nchez et al. 2020 220.875 -57.577 – -3.376 -2.154 –
Cantat-Gaudin & Anders 2020 220.859 -57.578 0.435 -3.487 -2.324 –
Liu & Pang 2019 220.872 -57.562 0.439 -3.473 -2.287 –
Soubiran et al. 2018 220.859 -57.578 – – – -26.16
Bica et al. 2019 220.864 -57.584 – – – –
Cantat-Gaudin et al. 2018 220.859 -57.578 0.435 -3.487 -2.324 –
Kharchenko et al. 2016 220.863 -57.564 – – – –
Dias et al. 2014 220.875 -57.577 – -1.59 -1.85 –
Kharchenko et al. 2013 220.875 -57.567 – -3.66 -0.42 –
Dias et al. 2002 220.875 -57.577 – -1.76 -2.0 –

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– 1.81 1.75 1.09 656 0.203 782 0.7 –
Li et al. 2025 1.81 1.85 – 666 0.059 – – –
Hu & Soubiran 2025 – – – – -0.160(5) – – –
Almeida et al. 2025 1.73 1.75 – 656 – 637 – –
Hunt & Reffert 2024 – – – – – 1945(1) – –
Cavallo et al. 2024 1.79 2.05 – 513 0.370 – – –
Hunt & Reffert 2023 2.02 2.08 1.09 272 – – – –
Almeida et al. 2023 1.92 2.12 – 474 0.155 927(1) 0.70 –
Just et al. 2023 – – – 933 – 146 – –
Dias et al. 2021 1.73 1.75 – 656 0.287 – – –
Cantat-Gaudin et al. 2020 2.12 1.68 – 537 – – – –
Cantat-Gaudin & Anders 2020 2.15 – – – – – – –
Liu & Pang 2019 – – – 398 0.250 – – –
Soubiran et al. 2018 2.15 – – – – – – –
Cantat-Gaudin et al. 2018 2.15 – – – – – – –
Kharchenko et al. 2016 1.49 1.45 – 933 – – – –
Kharchenko et al. 2013 1.49 1.45 – 933 – – – –
Dias et al. 2002 1.50 1.30 – 794 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OC 0618 17.4 220.87 -57.58 0.48 -3.51 -2.29 -26.28 0.0

πŸ’‘ Note: The % column shows the percentage of members that Melotte 128 shares with each listed object.

Visualization
ℹ️
Melotte 128 UCC
Melotte 128 HUNT23
Melotte 128 CANTAT20
Galactocentric position diagram