Ruprecht 101

(FSR 1603; MWSC 2002)

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0.97 UTI
0.87
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 430
Radius (P>50% members) 3.7 [arcmin]
  • CN 0.87 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
Ruprecht 101 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.
Relatively close Moderate extinction Massive Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
πŸ” Search references for Ruprecht 101 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 182.399 -62.993 0.29 -9.512 0.486 -15.957
Li et al. 2025 182.398 -62.995 0.272 -9.521 0.479 –
Hu & Soubiran 2025 182.379 -62.993 – – – –
Almeida et al. 2025 182.41 -62.99 – – – –
Hunt & Reffert 2024 182.405 -62.99 0.294 -9.515 0.48 -10.964
Cavallo et al. 2024 182.379 -62.993 0.294 – – –
Hunt & Reffert 2023 182.405 -62.99 0.294 -9.515 0.48 -10.964
Just et al. 2023 182.383 -63.002 – – – –
Dias et al. 2021 182.41 -62.99 0.272 -9.519 0.474 -14.973
Cantat-Gaudin et al. 2020 182.398 -62.995 0.272 -9.521 0.479 –
SΓ‘nchez et al. 2020 182.408 -62.983 – -9.388 0.404 –
Cantat-Gaudin & Anders 2020 182.398 -62.995 0.272 -9.521 0.479 –
Soubiran et al. 2018 182.398 -62.995 – – – -14.31
Cantat-Gaudin et al. 2018 182.398 -62.995 0.272 -9.521 0.479 –
Kharchenko et al. 2016 182.383 -63.002 – – – –
Dias et al. 2014 182.408 -62.983 – -3.99 2.34 –
Kharchenko et al. 2013 182.392 -63.005 – -4.66 1.07 –
Froebrich et al. 2007 182.438 -62.997 – – – –
Dias et al. 2002 182.408 -62.983 – -3.99 2.34 –

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] Bfr BSS
Li et al. 2025 3.29 1.92 – 935 0.150 – – –
Hu & Soubiran 2025 – – – – -0.240* – – –
Almeida et al. 2025 2.85 1.87 – 1030 – 1599 – –
Hunt & Reffert 2024 – – – – – 4140* – –
Cavallo et al. 2024 2.27 2.04 – 1175 -0.060 – – –
Hunt & Reffert 2023 3.16 2.02 0.68 582 – – – –
Just et al. 2023 – – – 741 – 2188 – –
Dias et al. 2021 2.85 1.87 – 1030 0.024 – – –
Cantat-Gaudin et al. 2020 2.81 1.32 – 1047 – – – –
Cantat-Gaudin & Anders 2020 3.32 – – – – – – –
Soubiran et al. 2018 3.32 – – – – – – –
Cantat-Gaudin et al. 2018 3.32 – – – – – – –
Kharchenko et al. 2016 2.86 2.13 – 741 – – – –
Kharchenko et al. 2013 2.86 2.13 – 741 – – – –
Dias et al. 2002 2.32 1.61 – 1122 – – – –

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

Visualization
ℹ️
Ruprecht 101 UCC
Ruprecht 101 HUNT23
Ruprecht 101 CANTAT20
Galactocentric position diagram