Ruprecht 170

(MWSC 2912)

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0.86 UTI
0.7
CN
1.0
Cdens
1.0
CC3
0.79
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 90
Radius (P>50% members) 2.8 [arcmin]
  • CN 0.7 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.79 Well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
Ruprecht 170 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is well-studied in the literature.
Relatively close Moderate extinction Near-solar metallicity Very young

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Ruprecht 170 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 – 276.342 -10.014 0.478 0.465 -0.165 36.629
Almeida et al. 2025 276.325 -9.986 – – – –
Hunt & Reffert 2024 276.339 -10.013 0.476 0.448 -0.171 –
Cavallo et al. 2024 276.345 -10.01 0.475 – – –
Hunt & Reffert 2023 276.339 -10.013 0.476 0.448 -0.171 –
Just et al. 2023 276.36 -10.016 – – – –
Dias et al. 2021 276.325 -9.986 0.453 0.44 -0.137 –
Cantat-Gaudin et al. 2020 276.335 -9.995 0.463 0.452 -0.132 –
Cantat-Gaudin & Anders 2020 276.335 -9.995 0.463 0.452 -0.132 –
Soubiran et al. 2018 276.335 -9.995 – – – 0.29
Cantat-Gaudin et al. 2018 276.335 -9.995 0.463 0.452 -0.132 –
Kharchenko et al. 2016 276.36 -10.016 – – – –
Dias et al. 2014 276.3 -10.0 – -3.18 -1.19 –
Kharchenko et al. 2013 276.367 -10.015 – -4.16 -2.23 –
Dias et al. 2002 276.3 -10.0 – -3.18 -1.19 –

💡 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
Almeida et al. 2025 2.05 2.53 – 14 – 480 – –
Hunt & Reffert 2024 – – – – – 996* – –
Cavallo et al. 2024 1.91 2.97 – 102 -0.100 – – –
Hunt & Reffert 2023 1.94 2.59 1.92 131 – – – –
Just et al. 2023 – – – 1 – 19999 – –
Dias et al. 2021 2.05 2.53 – 14 0.085 – – –
Cantat-Gaudin et al. 2020 2.16 1.99 – 59 – – – –
Cantat-Gaudin & Anders 2020 2.03 – – – – – – –
Soubiran et al. 2018 2.03 – – – – – – –
Cantat-Gaudin et al. 2018 2.03 – – – – – – –
Kharchenko et al. 2016 5.79 3.74 – 1 – – – –
Kharchenko et al. 2013 5.79 3.74 – 1 – – – –
Dias et al. 2002 5.79 3.74 – 1 – – – –

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

Visualization
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Ruprecht 170 UCC
Ruprecht 170 HUNT23
Ruprecht 170 CANTAT20
Galactocentric position diagram