Ruprecht 102

(VDBH 128; NGC 4184; MWSC 2007; OCL 877; vdBergh-Hagen 128; ESO 130 10)

0.81 UTI

0.57

C_N

1.0

C_dens

0.75

C_C3

0.87

C_lit

1.0

C_dup

N₅₀ (P>50% members) 65

Stellar density (N₅₀/rad) 24.8 [N/pc²]

C3 classification AB

C_N 0.57 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.87 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Ruprecht 102 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near 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 metallicity parameters (see Parameters). It is well-studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Ruprecht 102 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–	183.392	-62.72	0.306	-4.113	0.3	-27.457
Li et al.	2025	183.393	-62.719	0.305	-4.109	0.293	–
Hu & Soubiran	2025	183.375	-62.718	–	–	–	–
Almeida et al.	2025	183.38	-62.713	–	–	–	–
Hunt & Reffert	2024	183.399	-62.716	0.306	-4.124	0.313	-31.911
Cavallo et al.	2024	183.375	-62.718	0.307	–	–	–
Hunt & Reffert	2023	183.399	-62.716	0.306	-4.124	0.313	-31.911
Just et al.	2023	183.381	-62.727	–	–	–	–
Dias et al.	2021	183.38	-62.713	0.313	-4.097	0.313	-30.713
Cantat-Gaudin et al.	2020	183.393	-62.719	0.305	-4.109	0.293	–
Cantat-Gaudin & Anders	2020	183.393	-62.719	0.305	-4.109	0.293	–
Soubiran et al.	2018	183.393	-62.719	–	–	–	-30.34
Bica et al.	2019	183.38	-62.702	–	–	–	–
Cantat-Gaudin et al.	2018	183.393	-62.719	0.305	-4.109	0.293	–
Kharchenko et al.	2016	183.381	-62.727	–	–	–	–
Dias et al.	2014	183.387	-62.717	–	-4.41	-0.65	–
Kharchenko et al.	2013	183.39	-62.73	–	-6.98	0.43	–
Dias et al.	2002	183.387	-62.717	–	-6.98	0.43	–

💡 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–	2.71	1.62	1.25	377	-0.097	286	–	–
Li et al.	2025	2.67	1.67	–	526	0.036	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.230⁽⁵⁾	–	–	–
Almeida et al.	2025	2.71	1.59	–	579	–	286	–	–
Hunt & Reffert	2024	–	–	–	–	–	543⁽¹⁾	–	–
Cavallo et al.	2024	2.17	2.04	–	603	-0.540	–	–	–
Hunt & Reffert	2023	2.96	1.68	1.25	317	–	–	–	–
Just et al.	2023	–	–	–	32	–	148	–	–
Dias et al.	2021	2.71	1.59	–	579	0.163	–	–	–
Cantat-Gaudin et al.	2020	3.13	1.55	–	437	–	–	–	–
Cantat-Gaudin & Anders	2020	3.00	–	–	–	–	–	–	–
Soubiran et al.	2018	3.00	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.00	–	–	–	–	–	–	–
Kharchenko et al.	2016	1.61	1.62	–	32	–	–	–	–
Kharchenko et al.	2013	1.61	1.62	–	32	–	–	–	–
Dias et al.	2002	1.61	1.62	–	32	–	–	–	–

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

Visualization

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