Ruprecht 93

(NGC 3519; MWSC 1885; OCL 844; ESO 128 30; FoF 1062)

0.91 UTI

0.8

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 224

Stellar density (N₅₀/rad) 23.9 [N/pc²]

C3 classification AB

C_N 0.8 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 1.0 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 93 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate 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 mass parameter (see Parameters). It is very well-studied in the literature.

Relatively close Low extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Dias et al. (2002)
Spiral arm (Cheon, S. et al. 2010, JKAS, arXiv:1007.2686)

Data

🔍 Search references for Ruprecht 93 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–	166.042	-61.375	0.447	-6.426	3.132	-27.77
Li et al.	2025	166.037	-61.372	0.436	-6.411	3.104	–
Almeida et al.	2025	166.043	-61.375	–	–	–	–
Hunt & Reffert	2024	166.05	-61.377	0.447	-6.427	3.131	-27.73
Cavallo et al.	2024	166.028	-61.377	0.447	–	–	–
Hunt & Reffert	2023	166.05	-61.377	0.447	-6.427	3.131	-27.73
Almeida et al.	2023	166.047	-61.372	–	–	–	–
Just et al.	2023	166.042	-61.366	–	–	–	–
Dias et al.	2021	166.043	-61.375	0.437	-6.422	3.115	-24.55
Cantat-Gaudin et al.	2020	166.037	-61.372	0.436	-6.411	3.104	–
Cantat-Gaudin & Anders	2020	166.037	-61.372	0.436	-6.411	3.104	–
Liu & Pang	2019	166.072	-61.397	0.447	-6.462	2.843	–
Bossini et al.	2019	166.037	-61.372	–	–	–	–
Soubiran et al.	2018	166.037	-61.372	–	–	–	-24.4
Bica et al.	2019	166.018	-61.358	–	–	–	–
Cantat-Gaudin et al.	2018	166.037	-61.372	0.436	-6.411	3.104	–
Loktin & Popova	2017	166.05	-61.373	–	-3.191	-2.615	5.1
Kharchenko et al.	2016	166.042	-61.366	–	–	–	–
Kharchenko et al.	2013	166.05	-61.37	–	-5.08	0.85	5.1
Piskunov et al.	2008	166.084	-61.361	–	–	–	–
van den Bergh	2006	166.1	-61.367	–	–	–	–
Kharchenko et al.	2005	166.09	-61.37	–	-3.89	0.39	–
Kharchenko et al.	2003	166.08	-61.36	–	-3.05	-0.02	–

💡 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–	1.945	0.71	0.47	384	0.019	418	0.52	–
Li et al.	2025	1.87	0.67	–	511	-0.155	–	–	–
Almeida et al.	2025	2.00	0.90	–	281	–	335	–	–
Hunt & Reffert	2024	–	–	–	–	–	1209⁽¹⁾	–	–
Cavallo et al.	2024	1.89	1.05	–	316	-0.100	–	–	–
Hunt & Reffert	2023	2.05	0.38	0.47	480	–	–	–	–
Almeida et al.	2023	2.02	0.89	–	318	0.019	502⁽¹⁾	0.52	–
Just et al.	2023	–	–	–	569	–	110	–	–
Dias et al.	2021	2.00	0.90	–	281	0.028	–	–	–
Cantat-Gaudin et al.	2020	2.15	0.70	–	245	–	–	–	–
Cantat-Gaudin & Anders	2020	2.15	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	562	0.250	–	–	–
Bossini et al.	2019	2.16	0.64	–	330	0.010	–	–	–
Soubiran et al.	2018	2.15	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.15	–	–	–	–	–	–	–
Loktin & Popova	2017	1.46	0.70	–	160	–	–	–	–
Kharchenko et al.	2016	1.62	0.52	–	569	–	–	–	–
Kharchenko et al.	2013	1.62	0.52	–	569	0.153	–	–	–
Piskunov et al.	2008	1.44	0.71	–	437	–	–	–	–
van den Bergh	2006	1.44	0.71	–	155	–	–	–	–
Kharchenko et al.	2005	1.44	0.71	–	437	–	–	–	–
Kharchenko et al.	2003	1.43	0.71	–	–	–	–	–	–

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

Visualization

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