NGC 654

(MWSC 137)

1.0 UTI

1.0

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

C3 classification AA

Number of members (P>50%) 512

Radius (P>50% members) 2.6 [arcmin]

C_N 1.0 Very rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 1.0 Very well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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NGC 654 is a very 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, very young cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is very well-studied in the literature.

Note: This object shares a very small percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Massive Near-solar metallicity Very young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for NGC 654 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	–	26.005	61.886	0.323	-1.137	-0.32	-30.49
Almeida et al.	2025	26.007	61.879	–	–	–	–
Hunt & Reffert	2024	26.001	61.888	0.325	-1.147	-0.325	-20.61
Celli et al.	2024	26.008	61.883	–	–	–	–
Cavallo et al.	2024	25.98	61.868	0.324	–	–	–
Hunt & Reffert	2023	26.001	61.888	0.325	-1.147	-0.325	-20.61
Just et al.	2023	25.984	61.897	–	–	–	–
Jaehnig et al.	2021	26.011	61.886	0.344	-1.093	-0.266	–
Rain et al.	2021	26.008	61.883	0.313	-1.086	-0.265	–
Dias et al.	2021	26.007	61.879	0.315	-1.105	-0.26	–
Cantat-Gaudin et al.	2020	26.008	61.883	0.313	-1.086	-0.265	–
Cantat-Gaudin & Anders	2020	26.008	61.883	0.313	-1.086	-0.265	–
Cantat-Gaudin et al.	2018	26.008	61.883	0.313	-1.086	-0.265	–
Loktin & Popova	2017	25.995	61.885	–	0.143	-0.81	-38.8
Kharchenko et al.	2016	25.984	61.897	–	–	–	–
Dias et al.	2014	26.0	61.885	–	-0.96	-1.51	–
Kharchenko et al.	2013	25.995	61.9	–	0.9	-3.36	-38.8
Gozha et al.	2012	26.0	61.885	–	–	–	–
Kharchenko et al.	2012	25.995	61.9	–	0.92	-3.09	-38.79
Piskunov et al.	2008	25.99	61.873	–	–	–	–
Kharchenko et al.	2007	25.99	61.88	–	0.11	–	-38.79
van den Bergh	2006	26.0	61.883	–	–	–	–
Kharchenko et al.	2005	25.99	61.88	–	-1.34	0.49	-38.79
Kharchenko et al.	2003	25.96	61.85	–	-0.84	0.78	–
Chen et al.	2003	26.019	61.84	–	-1.34	-0.72	-33.8
Dias et al.	2002	26.0	61.885	–	-1.34	-0.72	-34.2
Dambis	1999	26.0	61.885	–	–	–	–

💡 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]	Bfr	BSS
Almeida et al.	2025	2.52	2.60	–	15	–	2207	–	–
Hunt & Reffert	2024	–	–	–	–	–	3819*	–	–
Celli et al.	2024	–	–	–	10	–	2548	–	–
Cavallo et al.	2024	3.13	2.62	–	25	0.760	–	–	–
Hunt & Reffert	2023	2.81	2.84	2.31	19	–	–	–	–
Just et al.	2023	–	–	–	18	–	256	–	–
Jaehnig et al.	2021	2.89*	–	–	–	–	–	–	–
Rain et al.	2021	2.92	2.54	–	10	–	–	–	0
Dias et al.	2021	2.52	2.60	–	15	-0.100	–	–	–
Cantat-Gaudin et al.	2020	3.12	2.29	–	10	–	–	–	–
Cantat-Gaudin & Anders	2020	2.92	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.92	–	–	–	–	–	–	–
Loktin & Popova	2017	2.06	2.68	–	14	–	–	–	–
Kharchenko et al.	2016	1.79	2.33	–	18	–	–	–	–
Kharchenko et al.	2013	1.79	2.33	–	18	–	–	–	–
Gozha et al.	2012	2.41	–	–	10	-0.680	126	–	–
Kharchenko et al.	2012	2.05	2.39	–	50	–	–	–	–
Piskunov et al.	2008	2.04	2.70	–	20	–	–	–	–
van den Bergh	2006	2.04	2.70	–	14	–	–	–	–
Kharchenko et al.	2005	2.04	2.70	–	20	–	–	–	–
Kharchenko et al.	2003	2.04	2.63	–	–	–	–	–	–
Chen et al.	2003	2.04	–	–	10	–	–	–	–
Dias et al.	2002	2.41	2.54	–	10	–	–	–	–
Dambis	1999	2.45	2.90	–	13	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 8405	2.0	26.32	61.78	0.37	-1.14	-0.36	–	0.06

💡 Note: The % column shows the percentage of members that NGC 654 shares with each listed object.

Visualization

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