Waterloo 7

(MWSC 1220)

0.85 UTI

0.51

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 52

Stellar density (N₅₀/rad) 8.8 [N/pc²]

C3 classification AB

C_N 0.51 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 1.0 Very well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Waterloo 7 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Distant Moderate extinction Near-solar metallicity Young Contains BSS

Cavallo et al. (2024)
Gold sample.

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

Data

🔍 Search references for Waterloo 7 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–	111.537	-15.093	0.275	-1.529	1.724	62.438
Li et al.	2025	111.532	-15.09	0.27	-1.514	1.695	–
Almeida et al.	2025	111.532	-15.088	–	–	–	–
Hunt & Reffert	2024	111.537	-15.092	0.264	-1.521	1.728	59.398
Cavallo et al.	2024	111.547	-15.089	0.263	–	–	–
Hunt & Reffert	2023	111.537	-15.092	0.264	-1.521	1.728	59.398
Just et al.	2023	111.526	-15.091	–	–	–	–
Rain et al.	2021	111.532	-15.09	0.27	-1.514	1.695	–
Dias et al.	2021	111.532	-15.088	0.267	-1.521	1.681	–
Cantat-Gaudin et al.	2020	111.532	-15.09	0.27	-1.514	1.695	–
Sánchez et al.	2020	111.533	-15.093	–	-1.875	1.684	–
Cantat-Gaudin & Anders	2020	111.532	-15.09	0.27	-1.514	1.695	–
Monteiro & Dias	2019	111.533	-15.093	–	-1.484	1.697	2.58
Bossini et al.	2019	111.532	-15.09	–	–	–	–
Soubiran et al.	2018	111.532	-15.09	–	–	–	65.91
Bica et al.	2019	111.541	-15.09	–	–	–	–
Cantat-Gaudin et al.	2018	111.532	-15.09	0.27	-1.514	1.695	–
Loktin & Popova	2017	111.54	-15.091	–	-2.705	0.737	83.0
Kharchenko et al.	2016	111.526	-15.091	–	–	–	–
Dias et al.	2014	111.533	-15.093	–	0.28	1.27	–
Kharchenko et al.	2013	111.532	-15.093	–	-1.79	2.63	83.0
Bukowiecki et al.	2011	111.529	-15.097	–	–	–	–
van den Bergh	2006	111.533	-15.093	–	–	–	–
Dias et al.	2002	111.533	-15.093	–	-1.79	2.63	–

💡 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–	3.265	1.3	0.95	67	0.025	368	–	1.0
Li et al.	2025	3.12	1.26	–	79	0.033	–	–	–
Almeida et al.	2025	2.84	1.41	–	67	–	201	–	–
Hunt & Reffert	2024	–	–	–	–	–	503⁽¹⁾	–	–
Cavallo et al.	2024	3.33	1.50	–	20	0.210	–	–	–
Hunt & Reffert	2023	3.20	1.10	0.95	192	–	–	–	–
Just et al.	2023	–	–	–	339	–	2366	–	–
Rain et al.	2021	3.35	1.27	–	58	–	–	–	1
Dias et al.	2021	2.84	1.41	–	67	-0.107	–	–	–
Cantat-Gaudin et al.	2020	3.56	1.48	–	30	–	–	–	–
Cantat-Gaudin & Anders	2020	3.35	–	–	–	–	–	–	–
Monteiro & Dias	2019	3.73	1.30	–	58	0.025	–	–	–
Bossini et al.	2019	3.68	1.32	–	45	0.000	–	–	–
Soubiran et al.	2018	3.35	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.35	–	–	–	–	–	–	–
Loktin & Popova	2017	4.23	0.57	–	93	–	–	–	–
Kharchenko et al.	2016	2.93	1.10	–	339	–	–	–	–
Kharchenko et al.	2013	2.93	1.10	–	339	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	232	–	–
Bukowiecki et al.	2011	2.20⁽¹⁾	0.81	–	28	–	–	–	–
van den Bergh	2006	2.80	1.30	–	–	–	–	–	–
Dias et al.	2002	2.80	1.30	–	–	–	–	–	–

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

Visualization

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