Ruprecht 46

(MWSC 1418; OCL 637; ESO 561 08)

0.17 UTI

0.0

C_N

0.07

C_dens

0.25

C_C3

0.26

C_lit

1.0

C_dup

N_m (P>50%) 22

Core radius and density 1.9 [pc], 0.4 [pc^-2]

C3 classification CC

C_N 0.0 Sparse
C_dens 0.07 Very loose
C_C3 0.25 Low quality
C_lit 0.26 Poorly studied
C_dup 1.0 Unique

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

Overview

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Ruprecht 46 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate^* distance, above the mid-plane, affected by low extinction. It is catalogued as a low-mass, near-solar metallicity, old cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~3.17 kpc) differs significantly from the median photometric distance (~1.47 kpc).

Note: This object contains blue stragglers according to at least one source.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Low extinction Low mass Near-solar metallicity Old Contains BSS

Cantat-Gaudin & Anders (2020)
Density enhancement without meaningful CMD features; likely not a real cluster. More details in Appendix A of the article.

Bica et al. (2019)
Web updates in DAML02, some were later removed (2003 to 2010).

Ahumada & Lapasset (2007)
The red limit of the blue straggler area is (V-I)=0.78.

Dias et al. (2002)
Asterism (Carraro, G.; Patat, F. 1995, MNRAS 276, 563); cat V3.5 (Jan 2016)

Data

🔍 Search references for Ruprecht 46 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–	120.542	-19.454	0.315	-1.087	0.226	–
Just et al.	2023	120.541	-19.462	–	–	–	–
Bica et al.	2019	120.542	-19.461	–	–	–	–
Joshi et al.	2016	120.547	-19.465	–	–	–	–
Kharchenko et al.	2016	120.541	-19.462	–	–	–	–
Kharchenko et al.	2013	120.547	-19.465	–	-6.78	1.83	–
Ahumada & Lapasset	2007	120.55	-19.467	–	–	–	–
van den Bergh	2006	120.542	-19.465	–	–	–	–
Chen et al.	2003	120.533	-19.466	–	–	–	–
Lynga	1987	120.529	-19.48	–	–	–	–

💡 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–	1.47	0.93	–	1652	-0.150	23	–	62
Just et al.	2023	–	–	–	141	–	23	–	–
Joshi et al.	2016	1.47	1.64	–	141	–	–	–	–
Kharchenko et al.	2016	1.47	1.64	–	141	–	–	–	–
Kharchenko et al.	2013	1.47	1.64	–	141	–	–	–	–
Paunzen et al.	2010	–	–	–	–	-0.150	–	–	–
Ahumada & Lapasset	2007	–	0.22	–	3981	–	–	–	62
van den Bergh	2006	0.75	0.22	–	3981	–	–	–	–
Chen et al.	2003	0.75	0.22	–	3980	-0.040⁽¹⁾	–	–	–
Lynga	1987	–	–	–	3162	-0.200	–	–	–

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

Visualization

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