Waterloo 1

(MWSC 359)

0.87 UTI

0.58

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 67

Stellar density (N₅₀/rad) 6.6 [N/pc²]

C3 classification AB

C_N 0.58 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 1 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 and metallicity parameters (see Parameters). It is very well-studied in the literature.

Distant Moderate extinction Near-solar metallicity Young

Cavallo et al. (2024)
Gold sample.

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

Data

🔍 Search references for Waterloo 1 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–	64.665	52.864	0.219	0.454	-0.748	-53.996
Almeida et al.	2025	64.712	52.865	–	–	–	–
Hunt & Reffert	2024	64.653	52.864	0.233	0.492	-0.782	-9.126
Celli et al.	2024	64.682	52.863	–	–	–	–
Cavallo et al.	2024	65.007	52.951	0.233	–	–	–
Hunt & Reffert	2023	64.653	52.864	0.233	0.492	-0.782	-9.126
Just et al.	2023	64.646	52.859	–	–	–	–
Dias et al.	2021	64.712	52.865	0.2	0.49	-0.686	–
Cantat-Gaudin et al.	2020	64.682	52.863	0.214	0.492	-0.689	–
Zhong et al.	2020	64.682	52.863	–	0.492	-0.689	-40.268
Cantat-Gaudin & Anders	2020	64.682	52.863	0.214	0.492	-0.689	–
Soubiran et al.	2018	64.682	52.863	–	–	–	-32.97
Cantat-Gaudin et al.	2018	64.682	52.863	0.214	0.492	-0.689	–
Loktin & Popova	2017	64.65	52.859	–	-1.721	2.801	–
Kharchenko et al.	2016	64.646	52.859	–	–	–	–
Dias et al.	2014	64.65	52.858	–	-0.94	-1.4	–
Kharchenko et al.	2013	64.657	52.86	–	-2.79	3.27	–
Kharchenko et al.	2012	64.657	52.86	–	-2.79	3.27	–
Bukowiecki et al.	2011	64.721	52.873	–	–	–	–
van den Bergh	2006	64.887	52.978	–	–	–	–

💡 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–	4.12	2.62	2.07	20	-0.085	697	–	–
Almeida et al.	2025	3.71	2.62	–	9	–	518	–	–
Hunt & Reffert	2024	–	–	–	–	–	697⁽¹⁾	–	–
Celli et al.	2024	–	–	–	17	–	634	–	–
Cavallo et al.	2024	3.73	2.33	–	91	0.700	–	–	–
Hunt & Reffert	2023	3.75	2.61	2.07	20	–	–	–	–
Just et al.	2023	–	–	–	398	–	1327	–	–
Dias et al.	2021	3.71	2.62	–	9	-0.254	–	–	–
Cantat-Gaudin et al.	2020	4.68	2.60	–	17	–	–	–	–
Zhong et al.	2020	0.00	0.00	–	0	-0.085	–	–	–
Cantat-Gaudin & Anders	2020	4.12	–	–	–	–	–	–	–
Soubiran et al.	2018	4.12	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	4.12	–	–	–	–	–	–	–
Loktin & Popova	2017	1.43	1.95	–	42	–	–	–	–
Kharchenko et al.	2016	4.40	2.82	–	398	–	–	–	–
Kharchenko et al.	2013	4.40	2.82	–	398	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	824	–	–
Kharchenko et al.	2012	4.40	2.82	–	398	–	–	–	–
Bukowiecki et al.	2011	5.45⁽¹⁾	3.47	–	7	–	–	–	–
van den Bergh	2006	4.40	2.79	–	–	–	–	–	–

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

Visualization

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