Ruprecht 68

(VDBH 49; MWSC 1547; OCL 729; vdBergh-Hagen 49; ESO 371 12; FSR 1384; FoF 592)

0.95 UTI

1.0

C_N

1.0

C_dens

1.0

C_C3

0.87

C_lit

1.0

C_dup

N_m (P>50%) 663

Core radius and density 2.6 [pc], 9.5 [pc^-2]

C3 classification AA

C_N 1.0 Very rich
C_dens 1.0 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 68 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is well-studied in the literature.

Relatively close Moderate extinction Massive Near-solar metallicity Old

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

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=0.0703, e_all=0.1166.

Data

🔍 Search references for Ruprecht 68 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–	131.146	-35.9	0.329	-2.619	5.652	50.578
Li et al.	2025	131.147	-35.9	0.301	-2.619	5.61	–
Hu & Soubiran	2025	131.152	-35.898	–	–	–	–
Almeida et al.	2025	131.155	-35.901	–	–	–	–
Hunt & Reffert	2024	131.138	-35.898	0.335	-2.608	5.662	52.162
Cavallo et al.	2024	131.152	-35.898	0.334	–	–	–
Hunt & Reffert	2023	131.138	-35.898	0.335	-2.608	5.662	52.162
Almeida et al.	2023	131.15	-35.906	–	–	–	–
Just et al.	2023	131.142	-35.882	–	–	–	–
Jadhav & Subramaniam	2021	131.147	-35.9	–	–	–	–
Dias et al.	2021	131.155	-35.901	0.301	-2.618	5.591	51.023
Cantat-Gaudin et al.	2020	131.147	-35.9	0.301	-2.619	5.61	–
Sánchez et al.	2020	131.146	-35.9	–	-2.635	5.576	–
Cantat-Gaudin & Anders	2020	131.147	-35.9	0.301	-2.619	5.61	–
Liu & Pang	2019	131.157	-35.901	0.309	-2.612	5.59	–
Soubiran et al.	2018	131.147	-35.9	–	–	–	50.62
Bica et al.	2019	131.151	-35.903	–	–	–	–
Cantat-Gaudin et al.	2018	131.147	-35.9	0.301	-2.619	5.61	–
Dias et al.	2018	–	–	–	-3.45	4.24	–
Sampedro et al.	2017	131.146	-35.9	–	-5.58	2.28	–
Kharchenko et al.	2016	131.142	-35.882	–	–	–	–
Dias et al.	2014	131.146	-35.9	–	-5.78	2.6	–
Kharchenko et al.	2013	131.148	-35.885	–	-8.19	8.66	–
Bukowiecki et al.	2011	131.133	-35.905	–	–	–	–
Glushkova et al.	2010	131.144	-35.9	–	–	–	–
Dias et al.	2002	131.146	-35.9	–	-5.78	2.6	–
Lynga	1987	131.12	-35.936	–	–	–	–
van den Bergh & Hagen	1975	130.625	-35.75	–	–	–	–

💡 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–	2.705	1.06	0.38	1820	-0.121	2356	0.59	0
Li et al.	2025	2.78	1.34	–	1871	-0.240	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.140⁽⁵⁾	–	–	–
Almeida et al.	2025	2.54	1.02	–	2307	–	1836	–	–
Hunt & Reffert	2024	2.70	1.00	0.38	1628	–	2877⁽¹⁾	–	–
Cavallo et al.	2024	2.55	1.22	–	1820	0.030	–	–	–
Hunt & Reffert	2023	2.70	1.00	0.38	1629	–	–	–	–
Almeida et al.	2023	2.71	1.42	–	1754	-0.102	1117⁽¹⁾	0.59	–
Just et al.	2023	–	–	–	2239	–	158	–	–
Jadhav & Subramaniam	2021	3.03	1.09	–	1820	–	3993	–	0⁽¹⁾
Dias et al.	2021	2.54	1.02	–	2307	0.130	–	–	–
Cantat-Gaudin et al.	2020	3.03	1.09	–	1820	–	–	–	–
Kounkel et al.	2020	2.75	1.06	–	2042	–	–	–	–
Cantat-Gaudin & Anders	2020	3.03	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	2510	-0.250	–	–	–
Soubiran et al.	2018	3.03	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.03	–	–	–	–	–	–	–
Kharchenko et al.	2016	2.18	1.05	–	2239	–	–	–	–
Kharchenko et al.	2013	2.18	1.05	–	2239	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	4227	–	–
Bukowiecki et al.	2011	3.02⁽¹⁾	0.60	–	1585	–	–	–	–
Glushkova et al.	2010	1.99	1.23	–	1413	–	–	–	–
Dias et al.	2002	1.99	1.23	–	1413	–	–	–	–

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

Visualization

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