NGC 4609

(MWSC 2062; FoF 1129)

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0.92 UTI
0.86
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 394
Radius (P>50% members) 5.9 [arcmin]
  • CN 0.86 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
NGC 4609 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is very well-studied in the literature.
Relatively close Moderate extinction 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
πŸ” Search references for NGC 4609 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 190.574 -62.994 0.678 -4.9 -1.007 3.553
Li et al. 2025 190.582 -62.995 0.66 -4.87 -1.045 –
Wei et al. 2025 190.537 -62.989 0.679 -4.887 -0.985 –
Almeida et al. 2025 190.583 -62.983 – – – –
Hunt & Reffert 2024 190.567 -62.993 0.688 -4.892 -1.002 -4.072
Cavallo et al. 2024 190.561 -62.981 0.687 – – –
Hunt & Reffert 2023 190.567 -62.993 0.688 -4.892 -1.002 -4.072
Almeida et al. 2023 190.632 -62.993 – – – –
Cordoni et al. 2023 190.583 -62.983 0.669 -4.876 -1.029 –
Just et al. 2023 190.565 -62.987 – – – –
Tarricq et al. 2022 190.538 -62.99 0.69 -4.894 -1.009 –
Jaehnig et al. 2021 190.563 -62.997 0.692 -4.868 -1.05 –
Rain et al. 2021 190.582 -62.995 0.66 -4.87 -1.045 –
Dias et al. 2021 190.583 -62.983 0.669 -4.876 -1.029 –
Cantat-Gaudin et al. 2020 190.582 -62.995 0.66 -4.87 -1.045 –
SΓ‘nchez et al. 2020 190.575 -62.995 – -4.879 -1.059 –
Cantat-Gaudin & Anders 2020 190.582 -62.995 0.66 -4.87 -1.045 –
Liu & Pang 2019 190.589 -62.991 0.676 -4.877 -1.028 –
Bossini et al. 2019 190.582 -62.995 – – – –
Soubiran et al. 2018 190.582 -62.995 – – – -25.22
Cantat-Gaudin et al. 2018 190.582 -62.995 0.66 -4.87 -1.045 –
Loktin & Popova 2017 190.575 -62.995 – -8.164 -1.542 22.0
Kharchenko et al. 2016 190.565 -62.987 – – – –
Dias et al. 2014 190.575 -62.995 – -3.83 -1.56 –
Kharchenko et al. 2013 190.575 -62.99 – -7.57 -1.36 22.0
Gozha et al. 2012 190.575 -62.995 – – – –
Piskunov et al. 2008 190.565 -62.983 – – – –
Kharchenko et al. 2007 190.57 -62.99 – 0.14 – 22.0
van den Bergh 2006 190.575 -62.983 – – – –
Kharchenko et al. 2005 190.57 -62.99 – -8.92 -1.67 –
Kharchenko et al. 2003 190.56 -62.99 – -9.21 -2.69 –
Dias et al. 2002 190.575 -62.995 – -9.45 -6.52 -21.3
Dambis 1999 190.575 -62.995 – – – –

πŸ’‘ 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
Li et al. 2025 1.31 1.12 – 59 -0.046 – – –
Wei et al. 2025 2.23 1.29 – 178 0.250 960 0.42 –
Almeida et al. 2025 1.37 1.23 – 53 – 1055 – –
Hunt & Reffert 2024 – – – – – 1514* – –
Cavallo et al. 2024 1.29 1.22 – 107 -0.050 – – –
Hunt & Reffert 2023 1.38 1.04 0.91 66 – – – –
Almeida et al. 2023 1.37 1.23 – 76 0.097 943* 0.58 –
Cordoni et al. 2023 1.37 1.23 – 53 0.023 4890 0.46 0.00
Just et al. 2023 – – – 126 – 119 – –
Tarricq et al. 2022 1.38 – – 83 – – – –
Jaehnig et al. 2021 1.44* – – – – – – –
Rain et al. 2021 1.45 1.05 – 33 – – – 0
Dias et al. 2021 1.37 1.23 – 53 0.023 – – –
Cantat-Gaudin et al. 2020 1.42 0.88 – 81 – – – –
Cantat-Gaudin & Anders 2020 1.45 – – – – – – –
Liu & Pang 2019 – – – 35 -0.250 – – –
Bossini et al. 2019 1.50 1.07 – 33 0.050 – – –
Soubiran et al. 2018 1.45 – – – – – – –
Cantat-Gaudin et al. 2018 1.45 – – – – – – –
Loktin & Popova 2017 1.24 1.02 – 79 – – – –
Kharchenko et al. 2016 1.31 1.13 – 126 – – – –
Kharchenko et al. 2013 1.31 1.13 – 126 – – – –
Gozha et al. 2012 1.22 – – 50 0.050 87 – –
Piskunov et al. 2008 1.22 1.02 – 60 – – – –
van den Bergh 2006 1.22 1.02 – 78 – – – –
Kharchenko et al. 2005 1.22 1.02 – 60 – – – –
Kharchenko et al. 2003 1.22 1.02 – – – – – –
Dias et al. 2002 1.32 1.15 – 50 0.050 – – –
Dambis 1999 1.23 1.11 – 32 – – – –

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

Visualization
ℹ️
NGC 4609 UCC
NGC 4609 HUNT23
NGC 4609 CANTAT20
Galactocentric position diagram