Ruprecht 151

(MWSC 1309; OCL 606)

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0.63 UTI
0.39
CN
0.26
Cdens
0.75
CC3
0.87
Clit
1.0
Cdup
Nm (P>50%) 39
Core radius and density 1.9 [pc], 1.3 [pc-2]
C3 classification AB
  • CN 0.39 Poorly populated
  • Cdens 0.26 Loose
  • CC3 0.75 High quality
  • Clit 0.87 Well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
Ruprecht 151 is a poorly populated, loose object of high C3 quality. Its parallax locates it at a relatively close 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 metallicity parameters (see Parameters). It is well-studied in the literature.

Palma et al. (2025)
Part of multiple system G236, along with Ruprecht_26, Theia_3581 and HSC_1867.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.108, e_all=0.3313.

Data
🔍 Search references for Ruprecht 151 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 115.293 -16.255 0.902 -4.239 3.369 22.807
Li et al. 2025 115.315 -16.279 0.867 -4.272 3.242 –
Hu & Soubiran 2025 115.273 -16.299 – – – –
Almeida et al. 2025 115.303 -16.28 – – – –
Hunt & Reffert 2024 115.3 -16.279 0.887 -4.238 3.334 21.567
Cavallo et al. 2024 115.273 -16.299 0.89 – – –
Hunt & Reffert 2023 115.3 -16.279 0.887 -4.238 3.334 21.567
Just et al. 2023 115.314 -16.288 – – – –
He et al. 2022 115.295 -16.253 0.908 -4.259 3.368 –
Tarricq et al. 2022 115.293 -16.294 0.912 -4.219 3.367 –
Jadhav & Subramaniam 2021 115.315 -16.279 – – – –
Dias et al. 2021 115.303 -16.28 0.864 -4.286 3.262 –
Cantat-Gaudin et al. 2020 115.315 -16.279 0.867 -4.272 3.242 –
Cantat-Gaudin & Anders 2020 115.315 -16.279 0.867 -4.272 3.242 –
Bossini et al. 2019 115.315 -16.279 – – – –
Bica et al. 2019 115.313 -16.247 – – – –
Cantat-Gaudin et al. 2018 115.315 -16.279 0.867 -4.272 3.242 –
Dias et al. 2018 – – – -2.29 1.8 –
Dib et al. 2018 115.32 -16.29 – – – –
Loktin & Popova 2017 115.32 -16.29 – -4.716 2.892 33.5
Sampedro et al. 2017 115.325 -16.25 – -3.94 1.59 –
Joshi et al. 2016 115.32 -16.29 – – – –
Kharchenko et al. 2016 115.314 -16.288 – – – –
Dias et al. 2014 115.325 -16.25 – -4.11 2.55 26.02
Kharchenko et al. 2013 115.32 -16.29 – -2.84 3.71 33.5
Piskunov et al. 2008 115.316 -16.291 – – – –
Kharchenko et al. 2005 115.32 -16.29 – -4.3 2.1 –
Kharchenko et al. 2003 115.32 -16.27 – -3.31 1.63 –
Lynga 1987 115.318 -16.255 – – – –

💡 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– 1.13 0.485 0.49 447 -0.001 99 – 0
Li et al. 2025 1.33 0.35 – 824 -0.049 – – –
Hu & Soubiran 2025 – – – – -0.200(5) – – –
Almeida et al. 2025 1.11 0.54 – 621 – 90 – –
Hunt & Reffert 2024 1.07 0.26 0.49 475 – 99(1) – –
Cavallo et al. 2024 1.10 0.30 – 832 0.180 – – –
Hunt & Reffert 2023 1.07 0.26 0.49 474 – – – –
Just et al. 2023 – – – 141 – 63 – –
He et al. 2022 – 0.40 – 631 – – – –
Tarricq et al. 2022 1.10 – – 490 – – – –
Jadhav & Subramaniam 2021 1.13 0.43 – 447 – 174 – 0(1)
Dias et al. 2021 1.11 0.54 – 621 0.048 – – –
Cantat-Gaudin et al. 2020 1.13 0.43 – 447 – – – –
Kounkel et al. 2020 1.10 0.94 – 257 – – – –
Cantat-Gaudin & Anders 2020 1.12 – – – – – – –
Bossini et al. 2019 1.18 0.59 – 411 0.153 – – –
Cantat-Gaudin et al. 2018 1.12 – – – – – – –
Dib et al. 2018 1.49 – – 141 – – – –
Loktin & Popova 2017 3.85 0.26 – 646 – – – –
Joshi et al. 2016 1.49 1.31 – 141 – 2188 – –
Kharchenko et al. 2016 1.49 1.31 – 141 – – – –
Kharchenko et al. 2013 1.49 1.31 – 141 -0.102 – – –
Piskunov et al. 2008 2.10 0.63 – 309 – – – –
Kharchenko et al. 2005 2.10 0.63 – 309 – – – –
Kharchenko et al. 2003 1.25 0.32 – – – – – –

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

Visualization
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Ruprecht 151 UCC
Ruprecht 151 HUNT23
Ruprecht 151 CANTAT20
Galactocentric position diagram