Ruprecht 34

(Berkeley 38; MWSC 1330; OCL 628; ESO 560 10)

0.85 UTI

0.75

C_N

1.0

C_dens

0.5

C_C3

1.0

C_lit

1.0

C_dup

C3 classification BB

Number of members (P>50%) 100

Radius (P>50% members) 2.3 [arcmin]

C_N 0.75 Rich
C_dens 1.0 Very dense
C_C3 0.5 Intermediate quality
C_lit 1.0 Very well-studied
C_dup 1.0 Unique

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

Overview

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Ruprecht 34 is a rich, very dense object of intermediate C3 quality. Its parallax locates it at a moderate distance, above 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 age and mass parameters (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: good fit. Isochrone match: good fit.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Ruprecht 34 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	–	116.483	-20.386	0.351	-2.15	1.031	46.392
Li et al.	2025	116.478	-20.386	0.357	-2.129	1.044	–
Almeida et al.	2025	116.472	-20.388	–	–	–	–
Hunt & Reffert	2024	116.482	-20.385	0.35	-2.176	1.042	46.375
Cavallo et al.	2024	116.479	-20.388	0.351	–	–	–
Hunt & Reffert	2023	116.482	-20.385	0.35	-2.176	1.042	46.375
Almeida et al.	2023	116.475	-20.389	–	–	–	–
Just et al.	2023	116.481	-20.383	–	–	–	–
Dias et al.	2021	116.472	-20.388	0.391	-2.145	1.05	46.496
Cantat-Gaudin et al.	2020	116.478	-20.386	0.357	-2.129	1.044	–
Sánchez et al.	2020	116.483	-20.39	–	-2.294	0.935	–
Cantat-Gaudin & Anders	2020	116.478	-20.386	0.357	-2.129	1.044	–
Bossini et al.	2019	116.478	-20.386	–	–	–	–
Soubiran et al.	2018	116.478	-20.386	–	–	–	46.44
Bica et al.	2019	116.46	-20.365	–	–	–	–
Cantat-Gaudin et al.	2018	116.478	-20.386	0.357	-2.129	1.044	–
Kharchenko et al.	2016	116.481	-20.383	–	–	–	–
Dias et al.	2014	116.483	-20.39	–	-3.01	0.82	–
Kharchenko et al.	2013	116.487	-20.385	–	-4.87	0.6	–
Piskunov et al.	2008	116.471	-20.383	–	–	–	–
Kharchenko et al.	2005	116.47	-20.38	–	-2.73	-2.1	–
Kharchenko et al.	2003	116.47	-20.39	–	-3.04	-2.33	–
Dias et al.	2002	116.483	-20.39	–	-3.01	0.82	–

💡 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	2.53	1.02	–	224	-0.144	–	–	–
Almeida et al.	2025	2.52	0.98	–	408	–	306	–	–
Hunt & Reffert	2024	–	–	–	–	–	340*	–	–
Cavallo et al.	2024	2.49	0.80	–	324	0.130	–	–	–
Hunt & Reffert	2023	2.52	0.80	0.89	395	–	–	–	–
Almeida et al.	2023	2.49	1.10	–	219	-0.095	374*	0.48	–
Just et al.	2023	–	–	–	1259	–	21	–	–
Dias et al.	2021	2.52	0.98	–	408	-0.100	–	–	–
Cantat-Gaudin et al.	2020	2.52	0.49	–	457	–	–	–	–
Cantat-Gaudin & Anders	2020	2.59	–	–	–	–	–	–	–
Bossini et al.	2019	2.31	0.36	–	733	0.000	–	–	–
Soubiran et al.	2018	2.59	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.59	–	–	–	–	–	–	–
Kharchenko et al.	2016	0.89	0.45	–	1259	–	–	–	–
Kharchenko et al.	2013	0.89	0.45	–	1259	–	–	–	–
Piskunov et al.	2008	0.80	0.31	–	794	–	–	–	–
Kharchenko et al.	2005	0.80	0.31	–	794	–	–	–	–
Kharchenko et al.	2003	1.00	0.31	–	–	–	–	–	–
Dias et al.	2002	2.63	0.00	–	1000	–	–	–	–

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

Visualization

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