NGC 654

(MWSC 137)

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1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
Nm (P>50%) 512
Core radius and density 1.0 [pc], 29 [pc-2]
C3 classification AA
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
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 near-solar metallicity, very young cluster, but with a large variance across recent sources for the metallicity and mass parameters (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.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1377, e_all=0.223.

Ahumada & Lapasset (2007)
The dereddened colour-magnitude diagram in (1960ApJ...132..696P) was examined.

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 99999– 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
Angelo et al. 2023 26.017 61.882 – -1.16 -0.32 –
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 –
Dib et al. 2018 25.995 61.9 – – – –
Loktin & Popova 2017 25.995 61.885 – 0.143 -0.81 -38.8
Sampedro et al. 2017 26.0 61.885 – -0.97 -0.93 –
Joshi et al. 2016 25.995 61.9 – – – –
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
Bukowiecki et al. 2011 26.008 61.89 – – – –
Piskunov et al. 2008 25.99 61.873 – – – –
Kharchenko et al. 2007 25.99 61.88 – 0.11 – -38.79
Ahumada & Lapasset 2007 26.0 61.883 – – – –
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 – – – –
Lynga 1987 26.02 61.891 – – – -31.0
Sulentic et al. 1973 25.983 61.892 – – – –

💡 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] Bfrac BSS
UCC 99999– 2.41 2.62 2.31 16 -0.130 784 – 0
Almeida et al. 2025 2.52 2.60 – 15 – 2207 – –
Hunt & Reffert 2024 2.81 2.84 2.31 19 – 3819(1) – –
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 – – – –
Angelo et al. 2023 2.14 3.25 – 20 -0.130 4(1) – –
Just et al. 2023 – – – 18 – 256 – –
Jaehnig et al. 2021 2.89(1) – – – – – – –
Rain et al. 2021 2.92 2.59 – 10 – – – 0
Dias et al. 2021 2.52 2.60 – 15 -0.100 – – –
Cantat-Gaudin et al. 2020 3.12 2.29 – 10 – – – –
Kounkel et al. 2020 2.83 2.51 – 35 – – – –
Cantat-Gaudin & Anders 2020 2.92 – – – – – – –
Cantat-Gaudin et al. 2018 2.92 – – – – – – –
Dib et al. 2018 1.79 – – 18 – – – –
Loktin & Popova 2017 2.06 2.73 – 14 – – – –
Joshi et al. 2016 1.79 2.37 – 18 – 126 – –
Kharchenko et al. 2016 1.79 2.37 – 18 – – – –
Kharchenko et al. 2013 1.79 2.37 – 18 – – – –
Bukowiecki et al. 2012 – – – – – 1311 – –
Gozha et al. 2012 2.41 – – 10 -0.680 126 – –
Kharchenko et al. 2012 2.05 2.43 – 50 – – – –
Bukowiecki et al. 2011 2.97(1) 2.30 – 16 – – – –
Paunzen et al. 2010 – – – – -0.680 – – –
Piskunov et al. 2008 2.04 2.74 – 20 – – – –
Ahumada & Lapasset 2007 – 2.74 – 14 – – – 0
van den Bergh 2006 2.04 2.74 – 14 – – – –
Kharchenko et al. 2005 2.04 2.74 – 20 – – – –
Kharchenko et al. 2003 2.04 2.68 – – – – – –
Chen et al. 2003 2.04 – – 10 – – – –
Dias et al. 2002 2.41 2.59 – 10 – – – –
Dambis 1999 2.45 2.95 – 13 – – – –
Lynga 1987 1.60 2.71 – 15 – – – –

(N): Indicates that there are N extra values assigned to this parameter 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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NGC 654 UCC
NGC 654 HUNT23
NGC 654 CANTAT20
Galactocentric position diagram