Ruprecht 165

(OCL 881; ESO 172 01; MWSC 2036)

0.04 UTI

0.0

C_N

0.07

C_dens

0.12

C_C3

0.0

C_lit

1.0

C_dup

C3 classification DC

Number of members (P>50%) 18

Radius (P>50% members) 7.0 [arcmin]

C_N 0.0 Sparse
C_dens 0.07 Very loose
C_C3 0.12 Very low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

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

Overview

ℹ️

Ruprecht 165 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, above the mid-plane, affected by moderate extinction. It is catalogued as an old cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 7 years.

(*): The parallax distance estimate (~3.44 kpc) differs significantly from the median photometric distance (~2.08 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 Old

Data

🔍 Search references for Ruprecht 165 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	–	187.136	-56.407	0.29	-7.712	1.995	–
Bica et al.	2019	187.136	-56.41	–	–	–	–
Dias et al.	2014	187.146	-56.433	–	-14.33	-2.01	–
Dias et al.	2002	187.146	-56.433	–	-14.37	-2.2	–

💡 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
Dias et al.	2002	2.08	2.00	–	1303	–	–	–	–

Visualization

ℹ️