Ruprecht 100

(MWSC 1995)

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0.95 UTI
0.77
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 146
Radius (P>50% members) 3.4 [arcmin]
  • CN 0.77 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 100 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 and mass parameters (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 100 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 181.54 -62.625 0.28 -8.278 0.929 -11.556
Li et al. 2025 181.52 -62.624 0.253 -8.255 0.898 –
Hu & Soubiran 2025 181.545 -62.634 – – – –
Almeida et al. 2025 181.506 -62.628 – – – –
Hunt & Reffert 2024 181.521 -62.623 0.279 -8.247 0.956 -20.528
Cavallo et al. 2024 181.545 -62.634 0.28 – – –
Hunt & Reffert 2023 181.521 -62.623 0.279 -8.247 0.956 -20.528
Just et al. 2023 181.43 -62.614 – – – –
Dias et al. 2021 181.506 -62.628 0.253 -8.254 0.906 -11.048
Cantat-Gaudin et al. 2020 181.52 -62.624 0.253 -8.255 0.898 –
SΓ‘nchez et al. 2020 181.471 -62.617 – -8.226 1.101 –
Cantat-Gaudin & Anders 2020 181.52 -62.624 0.253 -8.255 0.898 –
Soubiran et al. 2018 181.52 -62.624 – – – -10.88
Cantat-Gaudin et al. 2018 181.52 -62.624 0.253 -8.255 0.898 –
Kharchenko et al. 2016 181.43 -62.614 – – – –
Dias et al. 2014 181.471 -62.617 – -3.41 -1.19 –
Kharchenko et al. 2013 181.44 -62.617 – -7.22 1.13 –
Dias et al. 2002 181.471 -62.617 – -3.41 -1.19 –

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 2.75 1.33 – 731 -0.031 – – –
Hu & Soubiran 2025 – – – – -0.350* – – –
Almeida et al. 2025 2.78 1.47 – 560 – 346 – –
Hunt & Reffert 2024 – – – – – 1504* – –
Cavallo et al. 2024 2.74 1.86 – 537 0.020 – – –
Hunt & Reffert 2023 3.19 1.86 2.10 232 – – – –
Just et al. 2023 – – – 398 – 1127 – –
Dias et al. 2021 2.78 1.47 – 560 0.062 – – –
Cantat-Gaudin et al. 2020 3.37 1.56 – 204 – – – –
Cantat-Gaudin & Anders 2020 3.55 – – – – – – –
Soubiran et al. 2018 3.55 – – – – – – –
Cantat-Gaudin et al. 2018 3.55 – – – – – – –
Kharchenko et al. 2016 2.59 2.26 – 398 – – – –
Kharchenko et al. 2013 2.59 2.26 – 398 – – – –
Dias et al. 2002 2.44 1.74 – 316 -0.200 – – –

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

Visualization
ℹ️
Ruprecht 100 UCC
Ruprecht 100 HUNT23
Ruprecht 100 CANTAT20
Galactocentric position diagram