Ruprecht 123

(MWSC 2584)

0.37 UTI

0.0

C_N

0.09

C_dens

0.12

C_C3

0.82

C_lit

1.0

C_dup

C3 classification DC

Number of members (P>50%) 17

Radius (P>50% members) 11.0 [arcmin]

C_N 0.0 Sparse
C_dens 0.09 Very loose
C_C3 0.12 Very low quality
C_lit 0.82 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Ruprecht 123 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a relatively close 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 parameter (see Parameters). It is well-studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Ruprecht 123 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	–	260.798	-37.939	0.533	1.238	-0.572	-19.953
Li et al.	2025	260.781	-37.898	0.604	1.044	0.922	–
Almeida et al.	2025	260.781	-37.898	–	–	–	–
Hunt & Reffert	2024	260.86	-37.916	0.653	1.672	-2.056	-20.683
Cavallo et al.	2024	260.868	-37.905	0.654	–	–	–
He et al.	2023	260.855	-37.909	0.658	1.699	-2.034	–
Hunt & Reffert	2023	260.86	-37.916	0.653	1.672	-2.056	-20.683
Just et al.	2023	260.871	-37.925	–	–	–	–
Dias et al.	2021	260.781	-37.898	0.604	1.044	0.922	–
Sánchez et al.	2020	260.858	-37.9	–	1.233	-1.963	–
Monteiro & Dias	2019	260.88	-37.925	–	1.03	0.888	3.055
Kharchenko et al.	2016	260.871	-37.925	–	–	–	–
Dias et al.	2014	260.858	-37.9	–	-0.79	-3.15	–
Kharchenko et al.	2013	260.88	-37.925	–	0.65	-2.0	–
Kharchenko et al.	2003	260.85	-37.96	–	-2.49	-0.02	–
Dias et al.	2002	260.858	-37.9	–	-0.79	-3.15	–

💡 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	1.55	1.87	–	516	0.160	–	–	–
Almeida et al.	2025	1.51	1.91	–	481	–	76	–	–
Hunt & Reffert	2024	–	–	–	–	–	321*	–	–
Cavallo et al.	2024	1.47	1.64	–	129	0.280	–	–	–
He et al.	2023	1.45	2.00	–	32	–	–	–	–
Hunt & Reffert	2023	1.45	1.77	1.13	242	–	–	–	–
Just et al.	2023	–	–	–	126	–	60	–	–
Dias et al.	2021	1.51	1.91	–	481	0.188	–	–	–
Monteiro & Dias	2019	1.72	1.46	–	612	0.020	–	–	–
Kharchenko et al.	2016	0.93	0.58	–	126	–	–	–	–
Kharchenko et al.	2013	0.93	0.58	–	126	–	–	–	–
Kharchenko et al.	2003	0.71	0.62	–	–	–	–	–	–
Dias et al.	2002	0.71	0.62	–	–	–	–	–	–

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

Visualization

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