Ruprecht 100

(MWSC 1995)

0.89 UTI

0.77

C_N

1.0

C_dens

1.0

C_C3

0.84

C_lit

1.0

C_dup

N₅₀ (P>50% members) 146

Stellar density (N₅₀/rad) 11.7 [N/pc²]

C3 classification AA

C_N 0.77 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.84 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

Ruprecht 100 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is well-studied in the literature.

Relatively close Moderate extinction Massive Near-solar metallicity Intermediate age

Piecka & Paunzen (2021)
Belongs to cluster aggregate 'Agg54' along with Ruprecht 101.

Cavallo et al. (2024)
Gold sample.

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

Data

🔍 Search references for Ruprecht 100 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	181.54	-62.625	0.28	-8.278	0.929	-11.556
Li et al.	2025	181.52	-62.624	0.253	-8.255	0.898	–
Hu & Soubiran	2025	181.545	-62.634	–	–	–	–
Almeida et al.	2025	181.506	-62.628	–	–	–	–
Hunt & Reffert	2024	181.521	-62.623	0.279	-8.247	0.956	-20.528
Cavallo et al.	2024	181.545	-62.634	0.28	–	–	–
Hunt & Reffert	2023	181.521	-62.623	0.279	-8.247	0.956	-20.528
Just et al.	2023	181.43	-62.614	–	–	–	–
Dias et al.	2021	181.506	-62.628	0.253	-8.254	0.906	-11.048
Cantat-Gaudin et al.	2020	181.52	-62.624	0.253	-8.255	0.898	–
Sánchez et al.	2020	181.471	-62.617	–	-8.226	1.101	–
Cantat-Gaudin & Anders	2020	181.52	-62.624	0.253	-8.255	0.898	–
Soubiran et al.	2018	181.52	-62.624	–	–	–	-10.88
Cantat-Gaudin et al.	2018	181.52	-62.624	0.253	-8.255	0.898	–
Kharchenko et al.	2016	181.43	-62.614	–	–	–	–
Dias et al.	2014	181.471	-62.617	–	-3.41	-1.19	–
Kharchenko et al.	2013	181.44	-62.617	–	-7.22	1.13	–
Dias et al.	2002	181.471	-62.617	–	-3.41	-1.19	–

💡 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–	2.78	1.74	2.1	398	-0.031	1127	–	–
Li et al.	2025	2.75	1.33	–	731	-0.031	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.350⁽⁵⁾	–	–	–
Almeida et al.	2025	2.78	1.47	–	560	–	346	–	–
Hunt & Reffert	2024	–	–	–	–	–	1504⁽¹⁾	–	–
Cavallo et al.	2024	2.74	1.86	–	537	0.020	–	–	–
Hunt & Reffert	2023	3.19	1.86	2.10	232	–	–	–	–
Just et al.	2023	–	–	–	398	–	1127	–	–
Dias et al.	2021	2.78	1.47	–	560	0.062	–	–	–
Cantat-Gaudin et al.	2020	3.37	1.56	–	204	–	–	–	–
Cantat-Gaudin & Anders	2020	3.55	–	–	–	–	–	–	–
Soubiran et al.	2018	3.55	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.55	–	–	–	–	–	–	–
Kharchenko et al.	2016	2.59	2.26	–	398	–	–	–	–
Kharchenko et al.	2013	2.59	2.26	–	398	–	–	–	–
Dias et al.	2002	2.44	1.74	–	316	-0.200	–	–	–

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

Visualization

ℹ️

1 2 3