Ruprecht 2

(MWSC 956)

0.18 UTI

0.0

C_N

0.01

C_dens

0.38

C_C3

0.25

C_lit

1.0

C_dup

C3 classification BC

Number of members (P>50%) 14

Radius (P>50% members) 7.5 [arcmin]

C_N 0.0 Sparse
C_dens 0.01 Very loose
C_C3 0.38 Low quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

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

Overview

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Ruprecht 2 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, well below the mid-plane, affected by moderate extinction. It is catalogued as an intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~8.07 kpc) differs significantly from the median photometric distance (~3.16 kpc).

Note: This object shares a very small percentage of members with a later reported entry. See table with shared members information.

⚠️ 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.

Distant Moderate extinction Intermediate age

Data

🔍 Search references for Ruprecht 2 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	–	100.296	-29.51	0.124	-0.47	1.794	69.323
Just et al.	2023	100.249	-29.549	–	–	–	–
Loktin & Popova	2017	100.26	-29.549	–	0.225	0.72	–
Kharchenko et al.	2016	100.249	-29.549	–	–	–	–
Kharchenko et al.	2013	100.254	-29.55	–	-1.31	7.73	–

💡 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	–	–	–	881	–	381	–	–
Loktin & Popova	2017	2.90	0.82	–	794	–	–	–	–
Kharchenko et al.	2016	3.16	1.94	–	881	–	–	–	–
Kharchenko et al.	2013	3.16	1.94	–	881	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Ruprecht 3	4.0	100.48	-29.47	0.15	-0.87	1.54	–	0.05

💡 Note: The % column shows the percentage of members that Ruprecht 2 shares with each listed object.

Visualization

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