Ruprecht 76

(MWSC 1663)

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0.89 UTI
0.68
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 86
Radius (P>50% members) 3.4 [arcmin]
  • CN 0.68 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
Ruprecht 76 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near 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 and metallicity parameters (see Parameters). It is very well-studied in the literature.

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

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Ruprecht 76 in: SciX Simbad
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Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 141.073 -51.652 0.503 -6.512 3.629 -1.298
Li et al. 2025 141.077 -51.651 0.466 -6.571 3.601 –
Almeida et al. 2025 141.077 -51.651 – – – –
Hunt & Reffert 2024 141.077 -51.651 0.492 -6.489 3.634 0.232
Cavallo et al. 2024 141.062 -51.654 0.494 – – –
Hunt & Reffert 2023 141.077 -51.651 0.492 -6.489 3.634 0.232
Almeida et al. 2023 141.081 -51.652 – – – –
Just et al. 2023 141.062 -51.657 – – – –
Dias et al. 2021 141.077 -51.651 0.467 -6.576 3.585 –
Cantat-Gaudin et al. 2020 141.077 -51.651 0.466 -6.571 3.601 –
Cantat-Gaudin & Anders 2020 141.077 -51.651 0.466 -6.571 3.601 –
Bossini et al. 2019 141.077 -51.651 – – – –
Cantat-Gaudin et al. 2018 141.077 -51.651 0.466 -6.571 3.601 –
Loktin & Popova 2017 141.06 -51.666 – -3.358 1.004 18.0
Kharchenko et al. 2016 141.062 -51.657 – – – –
Dias et al. 2014 141.054 -51.667 – -1.59 5.32 –
Kharchenko et al. 2013 141.067 -51.66 – -4.03 5.27 18.0
van den Bergh 2006 141.075 -51.665 – – – –
Dias et al. 2002 141.054 -51.667 – -1.59 5.32 –

💡 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 1.66 1.28 – 482 -0.138 – – –
Almeida et al. 2025 1.92 1.50 – 156 – 175 – –
Hunt & Reffert 2024 – – – – – 454* – –
Cavallo et al. 2024 1.84 1.35 – 324 0.170 – – –
Hunt & Reffert 2023 1.83 1.32 0.90 154 – – – –
Almeida et al. 2023 1.91 1.66 – 89 -0.014 160* 0.53 –
Just et al. 2023 – – – 141 – 62 – –
Dias et al. 2021 1.92 1.50 – 156 0.223 – – –
Cantat-Gaudin et al. 2020 1.94 1.12 – 309 – – – –
Cantat-Gaudin & Anders 2020 2.02 – – – – – – –
Bossini et al. 2019 2.05 1.29 – 199 0.000 – – –
Cantat-Gaudin et al. 2018 2.02 – – – – – – –
Loktin & Popova 2017 1.81 1.44 – 25 – – – –
Kharchenko et al. 2016 1.33 1.23 – 141 – – – –
Kharchenko et al. 2013 1.33 1.23 – 141 – – – –
van den Bergh 2006 1.26 1.18 – 54 – – – –
Dias et al. 2002 1.26 1.17 – 54 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OC 0512 43.0 141.07 -51.66 0.51 -6.5 3.64 6.36 0.0

💡 Note: The % column shows the percentage of members that Ruprecht 76 shares with each listed object.

Visualization
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Ruprecht 76 UCC
Ruprecht 76 HUNT23
Ruprecht 76 CANTAT20
Galactocentric position diagram