Ruprecht 169

0.18 UTI

0.31

C_N

0.48

C_dens

0.12

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 31

Stellar density (N₅₀/rad) 2.4 [N/pc²]

C3 classification DC

C_N 0.31 Poorly populated
C_dens 0.48 Loose
C_C3 0.12 Very low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Ruprecht 169 is a poorly populated, 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 an old cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 12 years.

(*): The parallax distance estimate (~2.82 kpc) differs significantly from the median photometric distance (~1.39 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 169 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	99999–	269.857	-24.792	0.355	-1.32	-2.553	25.592
Dias et al.	2014	269.842	-24.767	–	-1.34	-2.6	–
Dias et al.	2002	269.842	-24.767	–	-1.34	-2.6	–

💡 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]	B_frac	BSS
UCC	99999–	1.39	2.05	–	1000	–	–	–	–
Dias et al.	2002	1.39	2.05	–	1000	–	–	–	–

Visualization

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