Ruprecht 118

(MWSC 2402)

0.54 UTI

0.25

C_N

0.43

C_dens

1.0

C_C3

0.52

C_lit

1.0

C_dup

N_m (P>50%) 25

Core radius and density 1.1 [pc], 2.2 [pc^-2]

C3 classification AA

C_N 0.25 Poorly populated
C_dens 0.43 Loose
C_C3 1.0 Very high quality
C_lit 0.52 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Ruprecht 118 is a poorly populated, loose object of very high C3 quality. Its parallax locates it at a moderate^* distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age, metallicity, and mass parameters (see Parameters). It is moderately studied in the literature.

(*): The parallax distance estimate (~2.98 kpc) differs significantly from the median photometric distance (~1.74 kpc).

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

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Almeida et al. (2025)
Mass determination: good fit. Isochrone match: good fit.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.98 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.98 (50th percentile).

Data

🔍 Search references for Ruprecht 118 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–	246.114	-51.924	0.336	-3.174	-4.341	-58.541
Almeida et al.	2025	246.145	-51.954	–	–	–	–
Hunt & Reffert	2024	246.123	-51.918	0.356	-3.168	-4.316	-58.131
Cavallo et al.	2024	246.123	-51.913	0.355	–	–	–
Hunt & Reffert	2023	246.123	-51.918	0.356	-3.168	-4.316	-58.131
Just et al.	2023	246.167	-51.94	–	–	–	–
Dias et al.	2022	246.131	-51.941	0.358	-3.166	-4.333	–
Richer et al.	2021	246.164	-51.942	0.325	-3.114	-4.328	–
Dias et al.	2021	246.145	-51.954	0.285	-3.152	-4.345	–
Dias et al.	2018	–	–	–	-1.9	-3.44	–
Dib et al.	2018	246.18	-51.94	–	–	–	–
Sampedro et al.	2017	246.15	-51.967	–	-0.05	-3.54	–
Joshi et al.	2016	246.18	-51.94	–	–	–	–
Kharchenko et al.	2016	246.167	-51.94	–	–	–	–
Dias et al.	2014	246.15	-51.967	–	-0.51	-3.59	–
Kharchenko et al.	2013	246.18	-51.94	–	-2.49	-4.09	–
van den Bergh	2006	246.15	-51.967	–	–	–	–
Dias et al.	2002	246.15	-51.967	–	-0.33	-3.94	–
Lynga	1987	246.132	-51.966	–	–	–	–

💡 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–	1.74	1.29	1.35	212	0.136	385	–	–
Almeida et al.	2025	2.22	1.14	–	266	–	385	–	–
Hunt & Reffert	2024	2.52	1.32	1.35	131	–	538⁽¹⁾	–	–
Cavallo et al.	2024	2.14	1.90	–	47	-0.530	–	–	–
Hunt & Reffert	2023	2.52	1.32	1.35	131	–	–	–	–
Just et al.	2023	–	–	–	871	–	17	–	–
Dias et al.	2022	2.52⁽¹⁾	1.44⁽¹⁾	–	159⁽¹⁾	0.136⁽¹⁾	–	–	–
Richer et al.	2021	–	1.60	–	–	–	–	–	–
Dias et al.	2021	2.22	1.14	–	266	0.386	–	–	–
Dib et al.	2018	0.97	–	–	871	–	–	–	–
Joshi et al.	2016	0.97	0.46	–	871	–	–	–	–
Kharchenko et al.	2016	0.97	0.46	–	871	–	–	–	–
Kharchenko et al.	2013	0.97	0.46	–	871	–	–	–	–
van den Bergh	2006	1.34	1.29	–	129	–	–	–	–
Dias et al.	2002	1.34	1.29	–	129	–	–	–	–
Lynga	1987	–	–	–	126	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 313	76.0	246.11	-51.92	0.32	-3.15	-4.34	–	0.07

💡 Note: The % column shows the percentage of members that Ruprecht 118 shares with each listed object.

Visualization

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