NGC 663

(MWSC 139; FoF 2129)

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1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 1037
Radius (P>50% members) 5.8 [arcmin]
  • 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 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
NGC 663 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, 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 3 later reported entries. See table with shared members information.

Relatively close Moderate extinction Massive Near-solar metallicity 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 663 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 26.592 61.211 0.34 -1.134 -0.316 -43.866
Wei et al. 2025 26.529 61.192 0.344 -1.154 -0.357 –
Almeida et al. 2025 26.572 61.216 – – – –
Hunt & Reffert 2024 26.535 61.198 0.345 -1.141 -0.34 -24.951
Celli et al. 2024 26.586 61.212 – – – –
Cavallo et al. 2024 26.553 61.193 0.345 – – –
Hunt & Reffert 2023 26.535 61.198 0.345 -1.141 -0.34 -24.951
Just et al. 2023 26.539 61.222 – – – –
Jaehnig et al. 2021 26.595 61.206 0.353 -1.121 -0.217 –
Rain et al. 2021 26.586 61.212 0.32 -1.11 -0.235 –
Dias et al. 2021 26.572 61.216 0.322 -1.109 -0.233 –
Cantat-Gaudin et al. 2020 26.586 61.212 0.32 -1.11 -0.235 –
Cantat-Gaudin & Anders 2020 26.586 61.212 0.32 -1.11 -0.235 –
Liu & Pang 2019 26.367 61.117 0.456 -1.067 -0.308 –
Cantat-Gaudin et al. 2018 26.586 61.212 0.32 -1.11 -0.235 –
Loktin & Popova 2017 26.535 61.235 – -0.737 -0.62 -31.6
Kharchenko et al. 2016 26.539 61.222 – – – –
Dias et al. 2014 26.538 61.235 – -2.52 -0.96 –
Kharchenko et al. 2013 26.55 61.225 – -0.98 -1.94 -31.6
Gozha et al. 2012 26.538 61.235 – – – –
Kharchenko et al. 2012 26.55 61.225 – -0.98 -1.94 -31.58
Piskunov et al. 2008 26.524 61.237 – – – –
Kharchenko et al. 2007 26.53 61.24 – 0.3 – -31.58
Piskunov et al. 2007 26.524 61.237 – – – –
van den Bergh 2006 26.55 61.233 – – – –
Kharchenko et al. 2005 26.53 61.24 – -2.91 -2.09 -30.98
Kharchenko et al. 2003 26.52 61.24 – -3.88 -0.57 –
Chen et al. 2003 26.579 61.17 – -1.49 -2.3 -32.0
Dias et al. 2002 26.538 61.235 – -1.49 -2.3 -33.09
Dambis 1999 26.537 61.235 – – – –

💡 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
Wei et al. 2025 3.08 1.95 – 35 0.500 6178 0.37 –
Almeida et al. 2025 2.35 2.27 – 25 – 3086 – –
Hunt & Reffert 2024 – – – – – 7830* – –
Celli et al. 2024 – – – 30 – 3821 – –
Cavallo et al. 2024 3.08 2.29 – 39 0.420 – – –
Hunt & Reffert 2023 2.66 2.24 2.04 27 – – – –
Just et al. 2023 – – – 32 – 703 – –
Jaehnig et al. 2021 2.79* – – – – – – –
Rain et al. 2021 2.87 2.48 – 25 – – – 0
Dias et al. 2021 2.35 2.27 – 25 -0.125 – – –
Cantat-Gaudin et al. 2020 2.95 2.18 – 30 – – – –
Cantat-Gaudin & Anders 2020 2.87 – – – – – – –
Liu & Pang 2019 – – – 1100 0.500 – – –
Cantat-Gaudin et al. 2018 2.87 – – – – – – –
Loktin & Popova 2017 1.97 2.40 – 17 – – – –
Kharchenko et al. 2016 2.10 2.17 – 32 – – – –
Kharchenko et al. 2013 2.10 2.17 – 32 – – – –
Gozha et al. 2012 2.42 – – 25 -0.700 3311 – –
Kharchenko et al. 2012 2.10 2.17 – 32 – – – –
Piskunov et al. 2008 1.95 2.42 – 14 – 5572* – –
Piskunov et al. 2007 1.95 2.42 – 14 – 923 – –
van den Bergh 2006 1.95 2.42 – 16 – – – –
Kharchenko et al. 2005 1.95 2.42 – 14 – – – –
Kharchenko et al. 2003 1.95 2.42 – – – – – –
Chen et al. 2003 1.95 – – 10 – – – –
Dias et al. 2002 2.42 2.48 – 25 – – – –
Dambis 1999 1.82 2.59 – 16 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
CWWDL 8405 1.0 26.32 61.78 0.37 -1.14 -0.36 – 0.06
CWNU 3524 0.1 26.09 60.99 0.36 -1.2 -0.55 – 0.26
Teutsch 188 0.1 25.96 60.99 0.27 -1.41 -0.24 – 0.17

💡 Note: The % column shows the percentage of members that NGC 663 shares with each listed object.

Visualization
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NGC 663 UCC
NGC 663 HUNT23
NGC 663 CANTAT20
Galactocentric position diagram