Ruprecht 56

(MWSC 1452; OCL 730; ESO 312 01)

0.27 UTI

0.0

C_N

0.01

C_dens

0.38

C_C3

0.48

C_lit

1.0

C_dup

N_m (P>50%) 19

Core radius and density 8.3 [pc], 0.03 [pc^-2]

C3 classification CB

C_N 0.0 Sparse
C_dens 0.01 Very loose
C_C3 0.38 Low quality
C_lit 0.48 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Ruprecht 56 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, below the mid-plane, affected by low extinction. It is catalogued as a low-mass, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~5.98 kpc) differs significantly from the median photometric distance (~0.43 kpc).

Very close Low extinction Low mass Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.09 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.09 (50th percentile).

Data

🔍 Search references for Ruprecht 56 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–	123.023	-40.514	0.167	-2.42	3.281	55.011
Hunt & Reffert	2024	122.958	-40.496	0.151	-2.427	3.262	94.417
Cavallo et al.	2024	122.895	-40.514	0.156	–	–	–
Hunt & Reffert	2023	122.958	-40.496	0.151	-2.427	3.262	94.417
Just et al.	2023	123.16	-40.482	–	–	–	–
Bica et al.	2019	123.14	-40.464	–	–	–	–
Dib et al.	2018	123.165	-40.485	–	–	–	–
Sampedro et al.	2017	123.138	-40.467	–	-2.72	4.78	–
Joshi et al.	2016	123.165	-40.485	–	–	–	–
Kharchenko et al.	2016	123.16	-40.482	–	–	–	–
Dias et al.	2014	123.138	-40.467	–	-2.48	4.58	–
Kharchenko et al.	2013	123.165	-40.485	–	-9.4	4.8	–
Piskunov et al.	2008	123.129	-40.47	–	–	–	–
Piskunov et al.	2007	123.129	-40.47	–	–	–	–
Kharchenko et al.	2005	123.13	-40.47	–	-9.71	5.75	–
Kharchenko et al.	2003	123.16	-40.49	–	-9.84	5.97	–
Dias et al.	2002	123.138	-40.467	–	-2.48	4.58	–
Lynga	1987	123.14	-40.464	–	–	–	–

💡 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–	0.43	0.38	1.73	501	0.060	17	–	–
Hunt & Reffert	2024	5.86	2.93	1.73	121	–	403⁽¹⁾	–	–
Cavallo et al.	2024	3.82	2.97	–	135	0.060	–	–	–
Hunt & Reffert	2023	5.86	2.93	1.73	121	–	–	–	–
Just et al.	2023	–	–	–	556	–	10	–	–
Dib et al.	2018	0.43	–	–	556	–	–	–	–
Joshi et al.	2016	0.43	0.38	–	556	–	87	–	–
Kharchenko et al.	2016	0.43	0.38	–	556	–	–	–	–
Kharchenko et al.	2013	0.43	0.38	–	556	–	–	–	–
Piskunov et al.	2008	0.41	0.38	–	501	–	17⁽¹⁾	–	–
Piskunov et al.	2007	0.41	0.38	–	501	–	4	–	–
Kharchenko et al.	2005	0.41	0.38	–	501	–	–	–	–
Kharchenko et al.	2003	0.83	0.32	–	–	–	–	–	–
Dias et al.	2002	0.41	0.38	–	501	–	–	–	–

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

Visualization

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