Ruprecht 85

(VDBH83; FSR 1520; MWSC 1746; OCL 799; vdBergh-Hagen 83; ESO 167 15)

0.94 UTI

0.85

C_N

1.0

C_dens

1.0

C_C3

0.94

C_lit

1.0

C_dup

N_m (P>50%) 373

Core radius and density 1.5 [pc], 8.5 [pc^-2]

C3 classification AA

C_N 0.85 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.94 Very 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 85 is a rich, very dense object of very high C3 quality. Its parallax locates it at a large 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 age and mass parameters (see Parameters). It is very well-studied in the literature.

Distant Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.85 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.85 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1444, e_all=0.0737.

Data

🔍 Search references for Ruprecht 85 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–	150.36	-55.111	0.182	-4.419	3.241	23.451
Otto et al.	2026	150.362	-55.109	–	-4.44	3.24	21.8
Almeida et al.	2025	150.352	-55.111	–	–	–	–
Hunt & Reffert	2024	150.362	-55.109	0.182	-4.422	3.24	39.883
Cavallo et al.	2024	150.347	-55.11	0.181	–	–	–
Hunt & Reffert	2023	150.362	-55.109	0.182	-4.422	3.24	39.883
Just et al.	2023	150.415	-55.011	–	–	–	–
Dias et al.	2021	150.352	-55.111	0.172	-4.422	3.243	31.488
Spina et al.	2021	150.363	-55.111	0.177	-4.424	3.239	–
Cantat-Gaudin et al.	2020	150.36	-55.109	0.169	-4.443	3.241	–
Cantat-Gaudin & Anders	2020	150.36	-55.109	0.169	-4.443	3.241	–
Soubiran et al.	2018	150.36	-55.109	–	–	–	22.93
Bica et al.	2019	150.356	-55.115	–	–	–	–
Cantat-Gaudin et al.	2018	150.36	-55.109	0.169	-4.443	3.241	–
Dias et al.	2018	–	–	–	-3.24	1.96	–
Dib et al.	2018	150.42	-55.015	–	–	–	–
Sampedro et al.	2017	150.358	-55.117	–	-5.94	-0.48	–
Joshi et al.	2016	150.42	-55.015	–	–	–	–
Kharchenko et al.	2016	150.415	-55.011	–	–	–	–
Dias et al.	2014	150.358	-55.117	–	-6.75	-0.84	–
Kharchenko et al.	2013	150.42	-55.015	–	-4.8	4.45	–
Bukowiecki et al.	2011	150.35	-55.107	–	–	–	–
Piskunov et al.	2008	150.381	-55.013	–	–	–	–
Froebrich et al.	2007	150.367	-55.117	–	–	–	–
Kharchenko et al.	2005	150.39	-55.02	–	-3.68	4.78	–
Kharchenko et al.	2003	150.42	-55.01	–	-5.05	5.57	–
Dias et al.	2002	150.358	-55.117	–	-6.75	-0.84	–
Lynga	1987	150.426	-55.045	–	–	–	–
van den Bergh & Hagen	1975	149.975	-54.8	–	–	–	–

💡 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–	4.305	2.24	2.42	424	-0.237	947	–	–
Otto et al.	2026	–	–	–	204	-0.240⁽¹⁵⁾	–	–	–
Almeida et al.	2025	4.33	3.08	–	223	–	1638	–	–
Hunt & Reffert	2024	4.84	3.31	2.42	149	–	4853⁽¹⁾	–	–
Cavallo et al.	2024	4.49	3.53	–	182	-0.120	–	–	–
Hunt & Reffert	2023	4.84	3.31	2.42	149	–	–	–	–
Just et al.	2023	–	–	–	501	–	28	–	–
Spina et al.	2022	–	–	–	–	-0.237	–	–	–
Dias et al.	2021	4.33	3.08	–	223	0.010	–	–	–
Spina et al.	2021	4.92	–	–	204	-0.238⁽²⁰⁾	–	–	–
Cantat-Gaudin et al.	2020	4.81	2.61	–	204	–	–	–	–
Kounkel et al.	2020	4.28	2.76	–	347	–	–	–	–
Cantat-Gaudin & Anders	2020	5.04	–	–	–	–	–	–	–
Soubiran et al.	2018	5.04	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	5.04	–	–	–	–	–	–	–
Dib et al.	2018	1.29	–	–	501	–	–	–	–
Joshi et al.	2016	1.29	0.53	–	501	–	112	–	–
Kharchenko et al.	2016	1.29	0.53	–	501	–	–	–	–
Kharchenko et al.	2013	1.29	0.53	–	501	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	947	–	–
Bukowiecki et al.	2011	3.70⁽¹⁾	2.24	–	501	–	–	–	–
Piskunov et al.	2008	1.40	0.66	–	501	–	–	–	–
Kharchenko et al.	2005	1.40	0.66	–	501	–	–	–	–
Kharchenko et al.	2003	0.83	0.79	–	–	–	–	–	–
Dias et al.	2002	1.40	0.66	–	501	–	–	–	–

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

Visualization

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