Ruprecht 22

(MWSC 1240)

0.16 UTI

0.0

C_N

0.04

C_dens

0.12

C_C3

0.31

C_lit

1.0

C_dup

C3 classification DC

Number of members (P>50%) 18

Radius (P>50% members) 7.8 [arcmin]

C_N 0.0 Sparse
C_dens 0.04 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 22 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, below the mid-plane, affected by low extinction. It is catalogued as a low-mass, old cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~4.18 kpc) differs significantly from the median photometric distance (~1.61 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 Old

Data

🔍 Search references for Ruprecht 22 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	–	112.343	-29.209	0.239	-2.423	2.666	56.25
Just et al.	2023	112.319	-29.18	–	–	–	–
Loktin & Popova	2017	112.335	-29.155	–	-1.355	2.532	–
Kharchenko et al.	2016	112.319	-29.18	–	–	–	–
Dias et al.	2014	112.325	-29.183	–	-2.52	3.49	–
Kharchenko et al.	2013	112.324	-29.183	–	0.24	2.82	–

💡 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	–	–	–	1072	–	32	–	–
Loktin & Popova	2017	3.18	0.19	–	1047	–	–	–	–
Kharchenko et al.	2016	1.61	0.64	–	1072	–	–	–	–
Kharchenko et al.	2013	1.61	0.64	–	1072	–	–	–	–

Visualization

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