Ruprecht 105

(MWSC 2047; OCL 886; ESO 131 12; Slotegraaf 41; FoF 2153)

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0.91 UTI
0.56
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 62
Radius (P>50% members) 5.1 [arcmin]
  • CN 0.56 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 1.0 Very 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 105 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, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is very well-studied in the literature.
Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Ruprecht 105 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 188.704 -61.588 0.472 -6.007 0.0 -2.63
Li et al. 2025 188.694 -61.592 0.46 -5.986 -0.001 –
Almeida et al. 2025 188.721 -61.606 – – – –
Hunt & Reffert 2024 188.637 -61.595 0.465 -6.017 0.025 -2.742
Cavallo et al. 2024 188.712 -61.58 0.469 – – –
Hunt & Reffert 2023 188.637 -61.595 0.465 -6.017 0.025 -2.742
Almeida et al. 2023 188.708 -61.558 – – – –
Just et al. 2023 188.465 -61.571 – – – –
Dias et al. 2021 188.721 -61.606 0.459 -5.993 -0.006 -3.941
Cantat-Gaudin et al. 2020 188.694 -61.592 0.46 -5.986 -0.001 –
Cantat-Gaudin & Anders 2020 188.694 -61.592 0.46 -5.986 -0.001 –
Liu & Pang 2019 188.696 -61.58 0.466 -5.914 -0.066 –
Soubiran et al. 2018 188.694 -61.592 – – – -4.38
Bica et al. 2019 188.61 -61.575 – – – –
Cantat-Gaudin et al. 2018 188.694 -61.592 0.46 -5.986 -0.001 –
Kharchenko et al. 2016 188.465 -61.571 – – – –
Dias et al. 2014 188.558 -61.567 – -1.53 -0.68 –
Kharchenko et al. 2013 188.475 -61.575 – -8.5 -0.64 –
Piskunov et al. 2008 188.548 -61.563 – – – –
Kharchenko et al. 2005 188.56 -61.57 – -7.62 -0.61 –
Dias et al. 2002 188.558 -61.567 – -1.53 -0.68 –

💡 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 1.85 1.49 – 761 -0.039 – – –
Almeida et al. 2025 1.91 1.87 – 161 – 178 – –
Hunt & Reffert 2024 – – – – – 476* – –
Cavallo et al. 2024 1.91 1.81 – 339 0.150 – – –
Hunt & Reffert 2023 1.96 1.66 1.31 254 – – – –
Almeida et al. 2023 1.86 1.96 – 151 0.112 540* 0.55 –
Just et al. 2023 – – – 1259 – 121 – –
Dias et al. 2021 1.91 1.87 – 161 0.200 – – –
Cantat-Gaudin et al. 2020 2.05 1.50 – 389 – – – –
Cantat-Gaudin & Anders 2020 2.05 – – – – – – –
Liu & Pang 2019 – – – 955 -0.250 – – –
Soubiran et al. 2018 2.05 – – – – – – –
Cantat-Gaudin et al. 2018 2.05 – – – – – – –
Kharchenko et al. 2016 1.25 0.16 – 1259 – – – –
Kharchenko et al. 2013 1.25 0.16 – 1259 – – – –
Piskunov et al. 2008 0.95 0.16 – 1023 – – – –
Kharchenko et al. 2005 0.95 0.16 – 1023 – – – –
Dias et al. 2002 0.95 0.16 – 1023 – – – –

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

Visualization
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Ruprecht 105 UCC
Ruprecht 105 HUNT23
Ruprecht 105 CANTAT20
Galactocentric position diagram