Ruprecht 61

0.82 UTI

0.8

C_N

1.0

C_dens

0.75

C_C3

0.79

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 229

Radius (P>50% members) 2.8 [arcmin]

C_N 0.8 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.79 Well-studied
C_dup 1.0 Unique

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

Overview

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Ruprecht 61 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, old cluster (see Parameters). It is well-studied in the literature.

Note: This object shares a small percentage of members with a later reported entry. See table with shared members information.

Distant Moderate extinction Near-solar metallicity Old

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Ruprecht 61 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	–	126.329	-34.143	0.26	-2.534	3.811	44.799
Li et al.	2025	126.327	-34.135	0.271	-2.556	3.866	–
Hu & Soubiran	2025	126.328	-34.144	–	–	–	–
Almeida et al.	2025	126.321	-34.142	–	–	–	–
Hunt & Reffert	2024	126.323	-34.145	0.256	-2.528	3.808	42.951
Cavallo et al.	2024	126.328	-34.144	0.257	–	–	–
Hunt & Reffert	2023	126.323	-34.145	0.256	-2.528	3.808	42.951
Dias et al.	2021	126.321	-34.142	0.279	-2.53	3.826	–
Cantat-Gaudin et al.	2020	126.327	-34.135	0.271	-2.556	3.866	–
Cantat-Gaudin & Anders	2020	126.327	-34.135	0.271	-2.556	3.866	–
Soubiran et al.	2018	126.327	-34.135	–	–	–	42.7
Cantat-Gaudin et al.	2018	126.327	-34.135	0.271	-2.556	3.866	–
Dias et al.	2014	126.321	-34.15	–	-2.04	2.51	–
Gozha et al.	2012	126.321	-34.15	–	–	–	–
Dias et al.	2002	126.321	-34.15	–	-1.42	3.67	–

💡 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	3.53	1.18	–	943	-0.021	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.220*	–	–	–
Almeida et al.	2025	2.97	1.11	–	1191	–	181	–	–
Hunt & Reffert	2024	–	–	–	–	–	843*	–	–
Cavallo et al.	2024	3.22	1.52	–	1023	-0.090	–	–	–
Hunt & Reffert	2023	3.31	1.07	0.82	800	–	–	–	–
Dias et al.	2021	2.97	1.11	–	1191	-0.132	–	–	–
Cantat-Gaudin & Anders	2020	3.33	–	–	–	–	–	–	–
Soubiran et al.	2018	3.33	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.33	–	–	–	–	–	–	–
Gozha et al.	2012	3.90	–	–	1288	-0.400	–	–	–
Dias et al.	2002	3.90	0.93	–	1288	-0.380	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
HSC 2036	10.9	126.35	-34.14	0.32	-2.54	3.77	–	0.0

💡 Note: The % column shows the percentage of members that Ruprecht 61 shares with each listed object.

Visualization

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