Waterloo 2

(MWSC 551)

0.24 UTI

0.0

C_N

0.06

C_dens

0.25

C_C3

0.45

C_lit

1.0

C_dup

N₅₀ (P>50% members) 19

Stellar density (N₅₀/rad) 0.3 [N/pc²]

C3 classification CC

C_N 0.0 Sparse
C_dens 0.06 Very loose
C_C3 0.25 Low quality
C_lit 0.45 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Waterloo 2 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate^* distance, above the mid-plane, affected by low extinction. It is catalogued as a low-mass, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~3.42 kpc) differs significantly from the median photometric distance (~0.55 kpc).

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Close Low extinction Low mass Intermediate age

Data

🔍 Search references for Waterloo 2 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–	81.979	40.344	0.293	0.225	-2.602	29.315
Just et al.	2023	81.997	40.353	–	–	–	–
Loktin & Popova	2017	81.99	40.353	–	-0.438	-0.39	–
Kharchenko et al.	2016	81.997	40.353	–	–	–	–
Dias et al.	2014	82.004	40.372	–	0.68	-0.69	–
Kharchenko et al.	2013	82.008	40.352	–	-1.32	-1.27	–
Kharchenko et al.	2012	82.008	40.352	–	-1.32	-1.27	–
van den Bergh	2006	82.004	40.372	–	–	–	–
Dias et al.	2002	82.004	40.372	–	0.68	-0.69	–

💡 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–	0.55	0.53	–	214	–	7	–	–
Just et al.	2023	–	–	–	214	–	7	–	–
Loktin & Popova	2017	2.00	1.12	–	5	–	–	–	–
Kharchenko et al.	2016	0.55	0.53	–	214	–	–	–	–
Kharchenko et al.	2013	0.55	0.53	–	214	–	–	–	–
Kharchenko et al.	2012	0.55	0.53	–	214	–	–	–	–
van den Bergh	2006	0.57	0.53	–	–	–	–	–	–
Dias et al.	2002	0.55	0.53	–	214	–	–	–	–

Visualization

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