NGC 659

(MWSC 138)

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0.96 UTI
0.8
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 221
Radius (P>50% members) 3.1 [arcmin]
  • CN 0.8 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 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
NGC 659 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, 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.
Relatively close Moderate extinction Massive Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for NGC 659 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 – 26.097 60.678 0.301 -0.833 -0.299 -41.518
Almeida et al. 2025 26.103 60.677 – – – –
Hunt & Reffert 2024 26.086 60.672 0.301 -0.838 -0.324 -48.222
Celli et al. 2024 26.108 60.679 – – – –
Cavallo et al. 2024 26.093 60.675 0.302 – – –
Hunt & Reffert 2023 26.086 60.672 0.301 -0.838 -0.324 -48.222
Almeida et al. 2023 26.102 60.671 – – – –
Just et al. 2023 26.082 60.667 – – – –
Jaehnig et al. 2021 26.104 60.679 0.318 -0.802 -0.261 –
Rain et al. 2021 26.108 60.679 0.287 -0.796 -0.257 –
Dias et al. 2021 26.103 60.677 0.286 -0.792 -0.26 -57.228
Cantat-Gaudin et al. 2020 26.108 60.679 0.287 -0.796 -0.257 –
Cantat-Gaudin & Anders 2020 26.108 60.679 0.287 -0.796 -0.257 –
Dias et al. 2019 26.1 60.673 0.272 -0.799 -0.276 77.81
Cantat-Gaudin et al. 2018 26.108 60.679 0.287 -0.796 -0.257 –
Loktin & Popova 2017 26.1 60.673 – 0.042 -0.103 –
Kharchenko et al. 2016 26.082 60.667 – – – –
Dias et al. 2014 26.1 60.673 – -1.43 -0.31 –
Kharchenko et al. 2013 26.092 60.67 – -0.46 -0.63 –
Kharchenko et al. 2012 26.092 60.67 – -0.46 -0.63 –
Piskunov et al. 2008 26.087 60.669 – – – –
van den Bergh 2006 26.1 60.667 – – – –
Kharchenko et al. 2005 26.1 60.67 – -2.97 -0.55 –
Dias et al. 2002 26.1 60.673 – -2.67 1.07 –

💡 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 2.60 2.16 – 22 – 558 – –
Hunt & Reffert 2024 – – – – – 1892* – –
Celli et al. 2024 – – – 16 – 1487 – –
Cavallo et al. 2024 3.28 2.10 – 41 0.600 – – –
Hunt & Reffert 2023 2.92 2.12 1.58 42 – – – –
Almeida et al. 2023 2.63 2.17 – 24 -0.083 1094* 0.54 –
Just et al. 2023 – – – 58 – 290 – –
Jaehnig et al. 2021 3.13* – – – – – – –
Rain et al. 2021 3.17 2.02 – 35 – – – 0
Dias et al. 2021 2.60 2.16 – 22 -0.046 – – –
Cantat-Gaudin et al. 2020 3.31 1.86 – 15 – – – –
Cantat-Gaudin & Anders 2020 3.17 – – – – – – –
Dias et al. 2019 3.02 1.71 – 27 -0.524 – – –
Cantat-Gaudin et al. 2018 3.17 – – – – – – –
Loktin & Popova 2017 1.98 2.00 – 36 – – – –
Kharchenko et al. 2016 2.30 2.02 – 58 – – – –
Kharchenko et al. 2013 2.30 2.02 – 58 – – – –
Kharchenko et al. 2012 2.30 2.02 – 58 – – – –
Piskunov et al. 2008 1.94 2.02 – 63 – – – –
van den Bergh 2006 1.94 2.02 – 35 – – – –
Kharchenko et al. 2005 1.94 2.02 – 63 – – – –
Dias et al. 2002 1.94 2.02 – 35 – – – –

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

Visualization
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NGC 659 UCC
NGC 659 HUNT23
NGC 659 CANTAT20
Galactocentric position diagram