Ruprecht 51

(MWSC 1425)

0.16 UTI

0.0

C_N

0.06

C_dens

0.12

C_C3

0.31

C_lit

1.0

C_dup

C3 classification DC

Number of members (P>50%) 17

Radius (P>50% members) 6.9 [arcmin]

C_N 0.0 Sparse
C_dens 0.06 Very loose
C_C3 0.12 Very low quality
C_lit 0.31 Poorly studied
C_dup 1.0 Unique

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

Overview

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Ruprecht 51 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~3.69 kpc) differs significantly from the median photometric distance (~2.53 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 Moderate extinction Near-solar metallicity Intermediate age

Data

🔍 Search references for Ruprecht 51 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	–	120.925	-30.702	0.271	-2.756	2.553	–
Just et al.	2023	120.892	-30.657	–	–	–	–
Kharchenko et al.	2016	120.892	-30.657	–	–	–	–
Dias et al.	2014	120.904	-30.65	–	-2.81	0.16	–
Kharchenko et al.	2013	120.897	-30.66	–	2.22	1.95	–
Dias et al.	2002	120.904	-30.65	–	-2.81	0.16	–

💡 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	–	–	–	589	–	105	–	–
Kharchenko et al.	2016	2.53	1.74	–	589	–	–	–	–
Kharchenko et al.	2013	2.53	1.74	–	589	–	–	–	–
Dias et al.	2002	2.51	0.59	–	1000	0.040	–	–	–

Visualization

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