Melotte 105

(Collinder 246; VDBH 117; MWSC 1933; OCL 856; vdBergh-Hagen 117; ESO 093 07; FSR 1587; FoF 133)

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1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
Nm (P>50%) 788
Core radius and density 0.7 [pc], 76 [pc-2]
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 105 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 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.

Note: This object shares a very 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: good fit.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.098, e_all=0.1159.

Ahumada & Lapasset (2007)
All the cluster parameters except the apparent diameter were taken from (2005, unpublished data).

Data
πŸ” Search references for Melotte 105 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 169.922 -63.485 0.419 -6.774 2.167 1.248
Li et al. 2025 169.92 -63.486 0.407 -6.771 2.133 –
Almeida et al. 2025 169.915 -63.488 – – – –
Hunt & Reffert 2024 169.917 -63.484 0.424 -6.771 2.175 8.173
Cavallo et al. 2024 169.916 -63.488 0.424 – – –
Hunt & Reffert 2023 169.917 -63.484 0.424 -6.771 2.175 8.173
Angelo et al. 2023 169.912 -63.482 – -6.77 2.18 –
Just et al. 2023 169.911 -63.471 – – – –
Jaehnig et al. 2021 169.92 -63.487 0.436 -6.764 2.144 –
Rain et al. 2021 169.92 -63.486 0.407 -6.771 2.133 –
Dias et al. 2021 169.915 -63.488 0.415 -6.766 2.152 16.916
Cantat-Gaudin et al. 2020 169.92 -63.486 0.407 -6.771 2.133 –
SΓ‘nchez et al. 2020 169.925 -63.483 – -6.689 2.218 –
Cantat-Gaudin & Anders 2020 169.92 -63.486 0.407 -6.771 2.133 –
Liu & Pang 2019 169.918 -63.486 0.419 -6.766 2.136 –
Soubiran et al. 2018 169.92 -63.486 – – – 1.49
Bica et al. 2019 169.918 -63.48 – – – –
Cantat-Gaudin et al. 2018 169.92 -63.486 0.407 -6.771 2.133 –
Dias et al. 2018 – – – -6.78 2.64 –
Loktin & Popova 2017 169.92 -63.482 – -6.3 0.11 0.4
Sampedro et al. 2017 169.925 -63.483 – -6.08 -0.09 –
Kharchenko et al. 2016 169.911 -63.471 – – – –
Netopil et al. 2016 169.925 -63.483 – – – –
Dias et al. 2014 169.925 -63.483 – -6.3 0.11 –
Kharchenko et al. 2013 169.92 -63.475 – -5.93 1.69 0.4
Gozha et al. 2012 169.925 -63.483 – – – –
Bukowiecki et al. 2011 169.925 -63.474 – – – –
Ahumada & Lapasset 2007 169.925 -63.483 – – – –
van den Bergh 2006 169.875 -63.5 – – – –
Dias et al. 2002 169.925 -63.483 – -6.3 0.11 0.4
Lynga 1987 169.866 -63.514 – – – –
van den Bergh & Hagen 1975 169.325 -63.233 – – – –

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– 2.2 1.51 1.01 290 0.000 1708 – 2
Li et al. 2025 1.89 1.32 – 594 -0.241 – – –
Almeida et al. 2025 1.97 1.51 – 377 – 2382 – –
Hunt & Reffert 2024 2.20 1.23 1.01 289 – 3595(1) – –
Cavallo et al. 2024 2.31 1.34 – 490 0.360 – – –
Hunt & Reffert 2023 2.20 1.23 1.01 289 – – – –
Angelo et al. 2023 1.85 1.55 – 398 -0.130 5(1) – –
Just et al. 2023 – – – 237 – 242 – –
Jaehnig et al. 2021 2.27(1) – – – – – – –
Rain et al. 2021 2.29 2.62 – 355 – – – 1
Dias et al. 2021 1.97 1.51 – 377 -0.100 – – –
Cantat-Gaudin et al. 2020 2.34 1.42 – 302 – – – –
Kounkel et al. 2020 2.44 1.38 – 269 – – – –
Cantat-Gaudin & Anders 2020 2.29 – – – – – – –
Liu & Pang 2019 – – – 275 0.250 – – –
Soubiran et al. 2018 2.29 – – – – – – –
Cantat-Gaudin et al. 2018 2.29 – – – – – – –
Loktin & Popova 2017 2.20 1.58 – 195 – – – –
Kharchenko et al. 2016 2.20 1.58 – 237 – – – –
Netopil et al. 2016 7.45 – – 290 – – – –
Kharchenko et al. 2013 2.20 1.58 – 237 – – – –
Bukowiecki et al. 2012 – – – – – 1708 – –
Gozha et al. 2012 2.21 – – 207 0.000 – – –
Bukowiecki et al. 2011 2.06(1) 1.01 – 355 – – – –
Paunzen et al. 2010 – – – – 0.000 – – –
Ahumada & Lapasset 2007 – 1.55 – 316 – – – 4
van den Bergh 2006 2.21 1.51 – 209 – – – –
Dias et al. 2002 1.72 2.62 – 355 0.080 – – –
Lynga 1987 2.10 1.14 – 59 – – – –

(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 0564 5.7 169.91 -63.48 0.47 -6.73 2.17 – 0.0

πŸ’‘ Note: The % column shows the percentage of members that Melotte 105 shares with each listed object.

Visualization
ℹ️
Melotte 105 UCC
Melotte 105 HUNT23
Melotte 105 CANTAT20
Galactocentric position diagram