Tombaugh 5

(MWSC 306; OCL 385; FSR 0641; FoF 612)

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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%) 918
Radius (P>50% members) 10.0 [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
Tombaugh 5 is a very rich, very dense object of high C3 quality. Its parallax locates it at a relatively close 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, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.
Relatively close Moderate extinction Massive Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Tombaugh 5 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 56.975 59.066 0.572 0.455 -2.449 -24.313
Li et al. 2025 56.984 59.07 0.561 0.515 -2.388 –
Almeida et al. 2025 56.986 59.059 – – – –
Zhang et al. 2024 56.974 59.076 – – – –
Hunt & Reffert 2024 56.974 59.076 0.576 0.456 -2.459 -24.859
Cavallo et al. 2024 56.982 59.062 0.577 – – –
Hunt & Reffert 2023 56.974 59.076 0.576 0.456 -2.459 -24.859
Almeida et al. 2023 56.977 59.039 – – – –
Just et al. 2023 57.003 59.069 – – – –
Dias et al. 2021 56.986 59.059 0.562 0.523 -2.391 -23.107
Cantat-Gaudin et al. 2020 56.984 59.07 0.561 0.515 -2.388 –
SΓ‘nchez et al. 2020 56.95 59.05 – 0.453 -2.401 –
Cantat-Gaudin & Anders 2020 56.984 59.07 0.561 0.515 -2.388 –
Liu & Pang 2019 56.986 59.061 0.562 0.533 -2.383 –
Soubiran et al. 2018 56.984 59.07 – – – -23.1
Bica et al. 2019 57.004 59.089 – – – –
Cantat-Gaudin et al. 2018 56.984 59.07 0.561 0.515 -2.388 –
Loktin & Popova 2017 56.955 59.07 – 0.544 -1.267 -5.8
Kharchenko et al. 2016 57.003 59.069 – – – –
Dias et al. 2014 56.95 59.05 – -0.72 -1.75 –
Kharchenko et al. 2013 57.015 59.07 – 1.2 -1.42 -5.8
Gozha et al. 2012 56.95 59.05 – – – –
Kharchenko et al. 2012 57.015 59.07 – 1.2 -1.42 -5.8
Piskunov et al. 2008 56.944 59.049 – – – –
Kharchenko et al. 2007 56.95 59.05 – 0.18 – -5.8
Kharchenko et al. 2005 56.95 59.05 – -0.39 -2.64 –
Kharchenko et al. 2003 56.95 59.06 – 0.26 -3.04 –
Dias et al. 2002 56.95 59.05 – -0.72 -1.75 -5.8

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 1.39 2.33 – 469 -0.039 – – –
Almeida et al. 2025 1.53 2.41 – 178 – 2189 – –
Zhang et al. 2024 – – – – -0.040* – – –
Hunt & Reffert 2024 – – – – – 4363* – –
Cavallo et al. 2024 1.87 2.59 – 145 0.640 – – –
Hunt & Reffert 2023 1.63 2.62 1.78 149 – – – –
Almeida et al. 2023 1.54 2.50 – 225 0.020 1544* 0.69 –
Just et al. 2023 – – – 701 – 260 – –
Dias et al. 2021 1.53 2.41 – 178 0.189 – – –
Cantat-Gaudin et al. 2020 1.71 2.07 – 186 – – – –
Cantat-Gaudin & Anders 2020 1.70 – – – – – – –
Liu & Pang 2019 – – – 174 0.250 – – –
Soubiran et al. 2018 1.70 – – – – – – –
Cantat-Gaudin et al. 2018 1.70 – – – – – – –
Loktin & Popova 2017 1.26 2.39 – 166 – – – –
Kharchenko et al. 2016 1.35 1.71 – 701 – – – –
Kharchenko et al. 2013 1.35 1.71 – 701 – – – –
Gozha et al. 2012 1.75 – – 200 – 162 – –
Kharchenko et al. 2012 1.35 1.71 – 701 – – – –
Piskunov et al. 2008 1.00 0.78 – 537 – – – –
Kharchenko et al. 2005 1.00 0.78 – 537 – – – –
Kharchenko et al. 2003 1.80 0.78 – – – – – –
Dias et al. 2002 1.75 2.48 – 200 – – – –

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

Visualization
ℹ️
Tombaugh 5 UCC
Tombaugh 5 HUNT23
Tombaugh 5 CANTAT20
Galactocentric position diagram