Ruprecht 98

(VDBH 125; MWSC 1988; OCL 868; vdBergh-Hagen 125; ESO 094 09; OCSN 260)

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0.90 UTI
0.76
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 129
Radius (P>50% members) 31.5 [arcmin]
  • CN 0.76 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 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 98 is a rich, very dense object of high C3 quality. Its parallax locates it at a very close distance, near 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 parameter (see Parameters). It is very well-studied in the literature.
Very close Low extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Ruprecht 98 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 179.715 -64.603 2.098 -4.138 -8.61 -5.702
Li et al. 2025 179.715 -64.581 2.044 -4.114 -8.632 –
Wei et al. 2025 179.723 -64.581 2.103 -4.119 -8.604 –
Almeida et al. 2025 179.842 -64.505 – – – –
Alfonso et al. 2024 179.564 -64.451 2.054 -4.251 -8.52 –
Hunt & Reffert 2024 179.711 -64.613 2.078 -4.304 -8.476 -7.599
Cavallo et al. 2024 179.068 -64.413 2.081 – – –
Hunt & Reffert 2023 179.711 -64.613 2.078 -4.304 -8.476 -7.599
Almeida et al. 2023 179.899 -64.474 – – – –
Qin et al. 2023 179.77 -64.6 2.11 -4.0 -8.66 -5.75
Just et al. 2023 179.707 -64.584 – – – –
He et al. 2022 179.892 -64.6 2.103 -4.116 -8.648 –
Tarricq et al. 2022 179.639 -64.598 2.105 -4.108 -8.64 –
Jaehnig et al. 2021 179.681 -64.609 2.068 -4.209 -8.724 –
Rain et al. 2021 179.715 -64.581 2.044 -4.114 -8.632 –
Dias et al. 2021 179.842 -64.505 2.057 -4.094 -8.645 -4.3
Cantat-Gaudin et al. 2020 179.715 -64.581 2.044 -4.114 -8.632 –
Cantat-Gaudin & Anders 2020 179.715 -64.581 2.044 -4.114 -8.632 –
Bossini et al. 2019 179.715 -64.581 – – – –
Soubiran et al. 2018 179.715 -64.581 – – – -5.09
Bica et al. 2019 179.68 -64.575 – – – –
Cantat-Gaudin et al. 2018 179.715 -64.581 2.044 -4.114 -8.632 –
Loktin & Popova 2017 179.67 -64.583 – -10.352 -3.691 -7.6
Kharchenko et al. 2016 179.707 -64.584 – – – –
Dias et al. 2014 179.667 -64.583 – -5.24 -1.32 –
Kharchenko et al. 2013 179.715 -64.588 – -5.43 -9.02 -7.6
Gozha et al. 2012 179.667 -64.583 – – – –
Piskunov et al. 2008 179.658 -64.573 – – – –
Kharchenko et al. 2007 179.67 -64.58 – 0.35 – -7.6
Piskunov et al. 2007 179.658 -64.573 – – – –
van den Bergh 2006 179.65 -64.558 – – – –
Kharchenko et al. 2005 179.67 -64.58 – -5.08 -9.55 –
Kharchenko et al. 2003 179.61 -64.54 – -4.77 -10.95 –
Dias et al. 2002 179.667 -64.583 – -7.25 -7.1 -7.6

💡 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 0.45 0.48 – 826 -0.150 – – –
Wei et al. 2025 0.48 0.81 – 316 0.000 203 0.44 –
Almeida et al. 2025 0.48 0.70 – 467 – 161 – –
Alfonso et al. 2024 0.51 0.36 – 836 -0.048 – – –
Hunt & Reffert 2024 – – – – – 118* – –
Cavallo et al. 2024 0.47 0.82 – 331 0.090 – – –
Hunt & Reffert 2023 0.45 0.56 1.40 244 – – – –
Almeida et al. 2023 0.46 0.77 – 514 -0.127 259* 0.53 –
Qin et al. 2023 0.57 0.53 – 708 – – – –
Just et al. 2023 – – – 631 – 32 – –
He et al. 2022 – 0.85 – 355 – – – –
Tarricq et al. 2022 0.50 – – 501 – – – –
Jaehnig et al. 2021 0.48* – – – – – – –
Rain et al. 2021 0.48 0.50 – 316 – – – 0
Dias et al. 2021 0.48 0.70 – 467 -0.049 – – –
Cantat-Gaudin et al. 2020 0.51 0.36 – 490 – – – –
Cantat-Gaudin & Anders 2020 0.48 – – – – – – –
Bossini et al. 2019 0.47 0.50 – 570 0.000 – – –
Soubiran et al. 2018 0.48 – – – – – – –
Cantat-Gaudin et al. 2018 0.48 – – – – – – –
Loktin & Popova 2017 0.64 0.51 – 313 – – – –
Kharchenko et al. 2016 0.61 0.50 – 631 – – – –
Kharchenko et al. 2013 0.61 0.50 – 631 – – – –
Gozha et al. 2012 0.49 – – 322 – 263 – –
Piskunov et al. 2008 0.61 0.50 – 603 – 194* – –
Piskunov et al. 2007 0.61 0.50 – 603 – 84 – –
van den Bergh 2006 0.49 0.50 – 324 – – – –
Kharchenko et al. 2005 0.61 0.50 – 603 – – – –
Kharchenko et al. 2003 0.49 0.62 – – – – – –
Dias et al. 2002 0.49 0.50 – 322 – – – –

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

Visualization
ℹī¸
Ruprecht 98 UCC
Ruprecht 98 HUNT23
Ruprecht 98 CANTAT20
Galactocentric position diagram