Ruprecht 46

(MWSC 1418; OCL 637; ESO 561 08)

0.23 UTI

0.0

C_N

0.14

C_dens

0.25

C_C3

0.38

C_lit

1.0

C_dup

C3 classification CC

Number of members (P>50%) 22

Radius (P>50% members) 6.0 [arcmin]

C_N 0.0 Sparse
C_dens 0.14 Very loose
C_C3 0.25 Low quality
C_lit 0.38 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 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, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~3.17 kpc) differs significantly from the median photometric distance (~1.11 kpc).

⚠️ 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 Intermediate age

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

Dias et al. (2002)
Asterism (Carraro, G.; Patat, F. 1995, MNRAS 276, 563)

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	–	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	–	–	–	–
Kharchenko et al.	2016	120.541	-19.462	–	–	–	–
Kharchenko et al.	2013	120.547	-19.465	–	-6.78	1.83	–
van den Bergh	2006	120.542	-19.465	–	–	–	–
Chen et al.	2003	120.533	-19.466	–	–	–	–

💡 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
Just et al.	2023	–	–	–	141	–	23	–	–
Kharchenko et al.	2016	1.47	1.62	–	141	–	–	–	–
Kharchenko et al.	2013	1.47	1.62	–	141	–	–	–	–
van den Bergh	2006	0.75	0.22	–	3981	–	–	–	–
Chen et al.	2003	0.75	0.22	–	3980	-0.040*	–	–	–

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

Visualization

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