Ruprecht 82

(MWSC 1711; OCL 788; ESO 167 05; FoF 998)

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0.95 UTI
0.77
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 155
Radius (P>50% members) 3.8 [arcmin]
  • CN 0.77 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
Ruprecht 82 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate 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.
Relatively close Low extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Ruprecht 82 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 146.416 -54.005 0.439 -6.426 4.371 -10.896
Li et al. 2025 146.421 -54.004 0.43 -6.443 4.348 –
Hu & Soubiran 2025 146.413 -54.005 – – – –
Almeida et al. 2025 146.416 -54.003 – – – –
Hunt & Reffert 2024 146.431 -54.002 0.436 -6.428 4.375 -6.369
Cavallo et al. 2024 146.413 -54.005 0.436 – – –
Hunt & Reffert 2023 146.431 -54.002 0.436 -6.428 4.375 -6.369
Almeida et al. 2023 146.409 -54.001 – – – –
Just et al. 2023 146.433 -53.965 – – – –
Dias et al. 2021 146.416 -54.003 0.431 -6.438 4.348 2.157
Cantat-Gaudin et al. 2020 146.421 -54.004 0.43 -6.443 4.348 –
SΓ‘nchez et al. 2020 146.442 -54.0 – -6.215 4.335 –
Donor et al. 2020 146.438 -53.968 – -6.39 4.38 2.1
Cantat-Gaudin & Anders 2020 146.421 -54.004 0.43 -6.443 4.348 –
Liu & Pang 2019 146.429 -54.001 0.433 -6.402 4.317 –
Bossini et al. 2019 146.421 -54.004 – – – –
Soubiran et al. 2018 146.421 -54.004 – – – 2.08
Bica et al. 2019 146.444 -53.997 – – – –
Cantat-Gaudin et al. 2018 146.421 -54.004 0.43 -6.443 4.348 –
Kharchenko et al. 2016 146.433 -53.965 – – – –
Dias et al. 2014 146.442 -54.0 – -4.97 0.39 –
Kharchenko et al. 2013 146.437 -53.968 – -8.94 1.7 –
Piskunov et al. 2008 146.444 -53.997 – – – –
van den Bergh 2006 146.45 -54.0 – – – –
Kharchenko et al. 2005 146.44 -54.0 – -8.65 3.6 –
Kharchenko et al. 2003 146.41 -54.01 – -11.07 2.23 –
Dias et al. 2002 146.442 -54.0 – -4.97 0.39 –

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 1.97 0.92 – 584 -0.028 – – –
Hu & Soubiran 2025 – – – – -0.200* – – –
Almeida et al. 2025 1.87 1.13 – 406 – 424 – –
Hunt & Reffert 2024 – – – – – 917* – –
Cavallo et al. 2024 2.03 0.87 – 776 0.270 – – –
Hunt & Reffert 2023 2.10 0.88 0.76 443 – – – –
Almeida et al. 2023 2.00 1.20 – 437 -0.006 483* 0.59 –
Just et al. 2023 – – – 234 – 42 – –
Dias et al. 2021 1.87 1.13 – 406 0.067 – – –
Cantat-Gaudin et al. 2020 2.20 0.95 – 457 – – – –
Donor et al. 2020 – – – – -0.030 – – –
Cantat-Gaudin & Anders 2020 2.18 – – – – – – –
Liu & Pang 2019 – – – 589 -0.250 – – –
Bossini et al. 2019 2.21 1.04 – 353 0.000 – – –
Soubiran et al. 2018 2.18 – – – – – – –
Cantat-Gaudin et al. 2018 2.18 – – – – – – –
Kharchenko et al. 2016 2.23 1.55 – 234 – – – –
Kharchenko et al. 2013 2.23 1.55 – 234 – – – –
Piskunov et al. 2008 2.46 0.90 – 316 – – – –
van den Bergh 2006 2.46 0.90 – 316 – – – –
Kharchenko et al. 2005 2.46 0.90 – 316 – – – –
Kharchenko et al. 2003 2.46 0.90 – – – – – –
Dias et al. 2002 2.46 0.90 – 316 – – – –

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

Visualization
ℹ️
Ruprecht 82 UCC
Ruprecht 82 HUNT23
Ruprecht 82 CANTAT20
Galactocentric position diagram