Melotte 101

(Collinder 227; VDBH 101; MWSC 1840; OCL 841; vdBergh-Hagen 101; ESO 093 01; FSR 1564; FoF 44)

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1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 629
Radius (P>50% members) 5.7 [arcmin]
  • 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 πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
Melotte 101 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below 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 metallicity parameters (see Parameters). It is very well-studied in the literature.

Note: This object shares a very small percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Massive Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Melotte 101 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 160.548 -65.113 0.457 -6.322 3.486 6.271
Li et al. 2025 160.535 -65.11 0.439 -6.307 3.483 –
Wei et al. 2025 160.544 -65.106 0.459 -6.326 3.498 –
Almeida et al. 2025 160.52 -65.106 – – – –
Hunt & Reffert 2024 160.566 -65.111 0.461 -6.331 3.484 3.442
Cavallo et al. 2024 160.545 -65.106 0.461 – – –
Hunt & Reffert 2023 160.566 -65.111 0.461 -6.331 3.484 3.442
Just et al. 2023 160.561 -65.092 – – – –
Jaehnig et al. 2021 160.546 -65.107 0.47 -6.318 3.477 –
Rain et al. 2021 160.535 -65.11 0.439 -6.307 3.483 –
Dias et al. 2021 160.52 -65.106 0.448 -6.307 3.492 –
Cantat-Gaudin et al. 2020 160.535 -65.11 0.439 -6.307 3.483 –
SΓ‘nchez et al. 2020 160.55 -65.1 – -6.164 3.548 –
Cantat-Gaudin & Anders 2020 160.535 -65.11 0.439 -6.307 3.483 –
Liu & Pang 2019 160.554 -65.109 0.447 -6.319 3.468 –
Soubiran et al. 2018 160.535 -65.11 – – – 9.53
Bica et al. 2019 160.553 -65.089 – – – –
Cantat-Gaudin et al. 2018 160.535 -65.11 0.439 -6.307 3.483 –
Kharchenko et al. 2016 160.561 -65.092 – – – –
Dias et al. 2014 160.55 -65.1 – -4.31 0.79 69.13
Kharchenko et al. 2013 160.567 -65.095 – -5.6 3.0 9.7
Gozha et al. 2012 160.55 -65.1 – – – –
Piskunov et al. 2008 160.542 -65.098 – – – –
Piskunov et al. 2007 160.542 -65.098 – – – –
van den Bergh 2006 160.55 -65.1 – – – –
Kharchenko et al. 2005 160.54 -65.1 – -6.09 2.45 –
Kharchenko et al. 2003 160.5 -65.12 – -5.92 2.62 –
Dias et al. 2002 160.55 -65.1 – -4.31 0.79 69.13

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 1.87 0.89 – 523 -0.046 – – –
Wei et al. 2025 2.62 1.28 – 398 -0.250 1720 0.60 –
Almeida et al. 2025 1.91 1.22 – 172 – 1815 – –
Hunt & Reffert 2024 – – – – – 2597* – –
Cavallo et al. 2024 2.03 1.13 – 251 0.240 – – –
Hunt & Reffert 2023 2.02 1.03 0.84 137 – – – –
Just et al. 2023 – – – 126 – 849 – –
Jaehnig et al. 2021 2.13* – – – – – – –
Rain et al. 2021 2.13 1.49 – 78 – – – 0
Dias et al. 2021 1.91 1.22 – 172 0.066 – – –
Cantat-Gaudin et al. 2020 2.02 0.91 – 166 – – – –
Cantat-Gaudin & Anders 2020 2.13 – – – – – – –
Liu & Pang 2019 – – – 204 -0.250 – – –
Soubiran et al. 2018 2.13 – – – – – – –
Cantat-Gaudin et al. 2018 2.13 – – – – – – –
Kharchenko et al. 2016 2.00 1.39 – 126 – – – –
Kharchenko et al. 2013 2.00 1.39 – 126 – – – –
Gozha et al. 2012 2.00 – – 78 – 1820 – –
Piskunov et al. 2008 2.00 1.43 – 224 – 1799* – –
Piskunov et al. 2007 2.00 1.43 – 224 – 368 – –
van den Bergh 2006 2.00 1.49 – 78 – – – –
Kharchenko et al. 2005 2.00 1.43 – 224 – – – –
Kharchenko et al. 2003 2.00 1.49 – – – – – –
Dias et al. 2002 2.00 1.49 – 78 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OC 0555 10.0 160.57 -65.11 0.47 -6.33 3.46 6.96 0.0

πŸ’‘ Note: The % column shows the percentage of members that Melotte 101 shares with each listed object.

Visualization
ℹ️
Melotte 101 UCC
Melotte 101 HUNT23
Melotte 101 CANTAT20
Galactocentric position diagram