Ruprecht 34

(Berkeley 38; MWSC 1330; OCL 628; ESO 560 10)

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0.85 UTI
0.75
CN
1.0
Cdens
0.5
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 100
Stellar density (N50/rad) 27.6 [N/pc2]
C3 classification BB
  • CN 0.75 Rich
  • Cdens 1.0 Very dense
  • CC3 0.5 Intermediate 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
Ruprecht 34 is a rich, very dense object of intermediate C3 quality. Its parallax locates it at a moderate distance, above 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 age and mass parameters (see Parameters). It is very well-studied in the literature.

Cavallo et al. (2024)
Gold sample.

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

Data
πŸ” Search references for Ruprecht 34 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 116.483 -20.386 0.351 -2.15 1.031 46.392
Li et al. 2025 116.478 -20.386 0.357 -2.129 1.044 –
Almeida et al. 2025 116.472 -20.388 – – – –
Hunt & Reffert 2024 116.482 -20.385 0.35 -2.176 1.042 46.375
Cavallo et al. 2024 116.479 -20.388 0.351 – – –
Hunt & Reffert 2023 116.482 -20.385 0.35 -2.176 1.042 46.375
Almeida et al. 2023 116.475 -20.389 – – – –
Just et al. 2023 116.481 -20.383 – – – –
Dias et al. 2021 116.472 -20.388 0.391 -2.145 1.05 46.496
Cantat-Gaudin et al. 2020 116.478 -20.386 0.357 -2.129 1.044 –
SΓ‘nchez et al. 2020 116.483 -20.39 – -2.294 0.935 –
Cantat-Gaudin & Anders 2020 116.478 -20.386 0.357 -2.129 1.044 –
Bossini et al. 2019 116.478 -20.386 – – – –
Soubiran et al. 2018 116.478 -20.386 – – – 46.44
Bica et al. 2019 116.46 -20.365 – – – –
Cantat-Gaudin et al. 2018 116.478 -20.386 0.357 -2.129 1.044 –
Kharchenko et al. 2016 116.481 -20.383 – – – –
Dias et al. 2014 116.483 -20.39 – -3.01 0.82 –
Kharchenko et al. 2013 116.487 -20.385 – -4.87 0.6 –
Bukowiecki et al. 2011 116.475 -20.387 – – – –
Piskunov et al. 2008 116.471 -20.383 – – – –
Kharchenko et al. 2005 116.47 -20.38 – -2.73 -2.1 –
Kharchenko et al. 2003 116.47 -20.39 – -3.04 -2.33 –
Dias et al. 2002 116.483 -20.39 – -3.01 0.82 –

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– 2.505 0.45 0.89 501 -0.095 306 0.48 –
Li et al. 2025 2.53 1.02 – 224 -0.144 – – –
Almeida et al. 2025 2.52 0.98 – 408 – 306 – –
Hunt & Reffert 2024 – – – – – 340(1) – –
Cavallo et al. 2024 2.49 0.80 – 324 0.130 – – –
Hunt & Reffert 2023 2.52 0.80 0.89 395 – – – –
Almeida et al. 2023 2.49 1.10 – 219 -0.095 374(1) 0.48 –
Just et al. 2023 – – – 1259 – 21 – –
Dias et al. 2021 2.52 0.98 – 408 -0.100 – – –
Cantat-Gaudin et al. 2020 2.52 0.49 – 457 – – – –
Cantat-Gaudin & Anders 2020 2.59 – – – – – – –
Bossini et al. 2019 2.31 0.36 – 733 0.000 – – –
Soubiran et al. 2018 2.59 – – – – – – –
Cantat-Gaudin et al. 2018 2.59 – – – – – – –
Kharchenko et al. 2016 0.89 0.45 – 1259 – – – –
Kharchenko et al. 2013 0.89 0.45 – 1259 – – – –
Bukowiecki et al. 2012 – – – – – 178 – –
Bukowiecki et al. 2011 1.49(1) 0.34 – 501 – – – –
Piskunov et al. 2008 0.80 0.31 – 794 – – – –
Kharchenko et al. 2005 0.80 0.31 – 794 – – – –
Kharchenko et al. 2003 1.00 0.31 – – – – – –
Dias et al. 2002 2.63 0.00 – 1000 – – – –

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization
ℹ️
Ruprecht 34 UCC
Ruprecht 34 HUNT23
Ruprecht 34 CANTAT20
Galactocentric position diagram