Ruprecht 118

(MWSC 2402)

0.71 UTI

0.25

C_N

1.0

C_dens

1.0

C_C3

0.65

C_lit

1.0

C_dup

C3 classification AA

Number of members (P>50%) 25

Radius (P>50% members) 2.2 [arcmin]

C_N 0.25 Poorly populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.65 Moderately studied
C_dup 1.0 Unique

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

Overview

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Ruprecht 118 is a poorly populated, very dense 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 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.

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	–	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.	2021	246.145	-51.954	0.285	-3.152	-4.345	–
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	–

💡 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
Almeida et al.	2025	2.22	1.14	–	266	–	385	–	–
Hunt & Reffert	2024	–	–	–	–	–	538*	–	–
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.	2021	2.22	1.14	–	266	0.386	–	–	–
Kharchenko et al.	2016	0.97	0.45	–	871	–	–	–	–
Kharchenko et al.	2013	0.97	0.45	–	871	–	–	–	–
van den Bergh	2006	1.34	1.27	–	129	–	–	–	–
Dias et al.	2002	1.34	1.27	–	129	–	–	–	–

(*): Indicates that this parameter is assigned more than one value 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	–	0.09

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

Visualization

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