Ruprecht 97

(VDBH 124; MWSC 1987; OCL 867; vdBergh-Hagen 124; ESO 130 03)

0.88 UTI

0.76

C_N

0.91

C_dens

1.0

C_C3

0.87

C_lit

1.0

C_dup

N_m (P>50%) 121

Core radius and density 1.8 [pc], 4.5 [pc^-2]

C3 classification AA

C_N 0.76 Rich
C_dens 0.91 Very dense
C_C3 1.0 Very high quality
C_lit 0.87 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Ruprecht 97 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 near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is well-studied in the literature.

Distant Moderate extinction Near-solar metallicity Intermediate age

Almeida et al. (2025)
Mass determination: intermediate 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=0.0937, e_all=0.0969.

Data

🔍 Search references for Ruprecht 97 in: SciX Simbad

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Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	179.373	-62.71	0.252	-6.503	0.489	-11.456
Otto et al.	2026	179.366	-62.71	–	-6.49	0.43	0.2
Almeida et al.	2025	179.369	-62.708	–	–	–	–
Hunt & Reffert	2024	179.366	-62.71	0.259	-6.511	0.526	5.362
Cavallo et al.	2024	179.372	-62.704	0.259	–	–	–
Hunt & Reffert	2023	179.366	-62.71	0.259	-6.511	0.526	5.362
Just et al.	2023	179.338	-62.707	–	–	–	–
Dias et al.	2021	179.369	-62.708	0.197	-6.49	0.434	–
Spina et al.	2021	179.373	-62.707	0.193	-6.495	0.443	–
Cantat-Gaudin et al.	2020	179.369	-62.708	0.199	-6.486	0.435	–
Cantat-Gaudin & Anders	2020	179.369	-62.708	0.199	-6.486	0.435	–
Soubiran et al.	2018	179.369	-62.708	–	–	–	5.36
Bica et al.	2019	179.367	-62.706	–	–	–	–
Cantat-Gaudin et al.	2018	179.369	-62.708	0.199	-6.486	0.435	–
Dias et al.	2018	–	–	–	-6.69	-0.02	–
Dib et al.	2018	179.347	-62.71	–	–	–	–
Loktin & Popova	2017	179.37	-62.717	–	-3.792	-5.751	-14.9
Sampedro et al.	2017	179.367	-62.717	–	-3.79	-0.97	–
Joshi et al.	2016	179.347	-62.71	–	–	–	–
Kharchenko et al.	2016	179.338	-62.707	–	–	–	–
Dias et al.	2014	179.367	-62.717	–	-3.89	-1.11	–
Kharchenko et al.	2013	179.347	-62.71	–	-3.89	-2.47	-14.9
Gozha et al.	2012	179.367	-62.717	–	–	–	–
van den Bergh	2006	179.325	-62.65	–	–	–	–
Dias et al.	2002	179.367	-62.717	–	-3.89	-1.11	-14.9
Lynga	1987	179.33	-62.641	–	–	–	–
van den Bergh & Hagen	1975	178.8	-62.417	–	–	–	–

💡 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]	B_frac	BSS
UCC	99999–	3.21	1.065	0.75	220	-0.030	207	–	–
Otto et al.	2026	–	–	–	178	0.080⁽¹⁵⁾	–	–	–
Almeida et al.	2025	3.21	1.71	–	171	–	207	–	–
Hunt & Reffert	2024	3.57	1.42	0.75	166	–	688⁽¹⁾	–	–
Cavallo et al.	2024	3.18	1.89	–	204	-0.150	–	–	–
Hunt & Reffert	2023	3.57	1.43	0.75	166	–	–	–	–
Just et al.	2023	–	–	–	447	–	53	–	–
Spina et al.	2022	–	–	–	–	0.102	–	–	–
Dias et al.	2021	3.21	1.71	–	171	0.011	–	–	–
Spina et al.	2021	4.99	–	–	178	0.097⁽²⁰⁾	–	–	–
Cantat-Gaudin et al.	2020	3.89	1.40	–	178	–	–	–	–
Kounkel et al.	2020	4.09	1.40	–	417	–	–	–	–
Cantat-Gaudin & Anders	2020	4.40	–	–	–	–	–	–	–
Soubiran et al.	2018	4.40	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	4.40	–	–	–	–	–	–	–
Dib et al.	2018	1.54	–	–	447	–	–	–	–
Loktin & Popova	2017	1.33	0.71	–	228	–	–	–	–
Joshi et al.	2016	1.54	0.66	–	447	–	–	–	–
Kharchenko et al.	2016	1.54	0.66	–	447	–	–	–	–
Kharchenko et al.	2013	1.54	0.66	–	447	-0.590	–	–	–
Gozha et al.	2012	1.36	–	–	220	-0.220	–	–	–
Paunzen et al.	2010	–	–	–	–	-0.220	–	–	–
van den Bergh	2006	1.36	0.73	–	219	–	–	–	–
Dias et al.	2002	1.36	0.72	–	220	-0.030	–	–	–
Lynga	1987	4.00	0.63	–	1000	–	–	–	–

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

Visualization

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