NGC 2447

(Melotte 76; Collinder 160; MWSC 1324; M 93; OCL 649; FSR 1301; FoF 2085)

Click to load Aladin Lite
1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 1077
Stellar density (N50/rad) 91.1 [N/pc2]
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 2447 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is very well-studied in the literature.

Malhotra et al. (2026)
Lowest/Highest stellar mass in the catalogue with a mass-ratio estimate: 0.47/2.12 Msun

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Rain et al. (2021)
This cluster was include in (Dias et al., 2002A&A...389..871D, Cat. B/ocl) however, parameters log(t)=8.747, Av=0.105, [Fe/H]=0.00 were taken from Bossini et al. (2019A&A...623A.108B, Cat. J/A+A/623/A108).

Ahumada & Lapasset (2007)
Star 35=ADS 6339 is a binary (delta=0.5 mag, rho=0.7").

Data
🔍 Search references for NGC 2447 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 116.14 -23.851 0.99 -3.569 5.079 22.104
Malhotra et al. 2026 116.144 -23.856 – – – –
Otto et al. 2026 116.135 -23.849 – -3.55 5.07 23.5
Nizovkina et al. 2025 116.135 -23.849 – – – –
Li et al. 2025 116.141 -23.853 0.968 -3.551 5.068 –
Hu & Soubiran 2025 116.147 -23.853 – – – –
Wei et al. 2025 116.138 -23.854 0.994 -3.565 5.083 –
Almeida et al. 2025 116.157 -23.866 – – – –
Hunt & Reffert 2024 116.135 -23.849 0.996 -3.56 5.086 22.251
Cavallo et al. 2024 116.146 -23.853 0.993 – – –
He et al. 2023 116.265 -23.671 0.602 -3.181 2.802 33.96
Hunt & Reffert 2023 116.135 -23.849 0.996 -3.56 5.086 22.251
Cordoni et al. 2023 116.157 -23.866 0.975 -3.577 5.048 –
Just et al. 2023 116.139 -23.858 – – – –
He et al. 2022 116.143 -23.853 0.992 -3.561 5.087 –
Tarricq et al. 2022 116.139 -23.848 0.989 -3.567 5.077 –
Jadhav & Subramaniam 2021 116.141 -23.853 – – – –
Jaehnig et al. 2021 116.136 -23.853 1.0 -3.561 5.08 –
Netopil et al. 2022 116.126 -23.857 – – – 22.26
Rain et al. 2021 116.141 -23.853 0.968 -3.551 5.068 –
Dias et al. 2021 116.157 -23.866 0.975 -3.577 5.048 22.392
Spina et al. 2021 116.141 -23.851 0.973 -3.578 5.062 –
Cantat-Gaudin et al. 2020 116.141 -23.853 0.968 -3.551 5.068 –
Donor et al. 2020 116.145 -23.86 – -3.67 5.01 23.5
Cantat-Gaudin & Anders 2020 116.141 -23.853 0.968 -3.551 5.068 –
Liu & Pang 2019 116.144 -23.853 0.98 -3.579 5.051 –
Bossini et al. 2019 116.141 -23.853 – – – –
Soubiran et al. 2018 116.141 -23.853 – – – 21.99
Bica et al. 2019 116.121 -23.86 – – – –
Cantat-Gaudin et al. 2018 116.141 -23.853 0.968 -3.551 5.068 –
Dias et al. 2018 – – – -2.96 3.9 –
Dib et al. 2018 116.145 -23.86 – – – –
Loktin & Popova 2017 116.13 -23.857 – -3.784 3.571 21.3
Sampedro et al. 2017 116.125 -23.857 -3.11 3.3 – –
Joshi et al. 2016 116.145 -23.86 – – – –
Kharchenko et al. 2016 116.139 -23.858 – – – –
Netopil et al. 2016 116.125 -23.857 – – – –
Dias et al. 2014 116.125 -23.857 – -3.24 3.29 –
Kharchenko et al. 2013 116.145 -23.86 – -4.1 3.36 21.3
Gozha et al. 2012 116.125 -23.857 – – – –
Bukowiecki et al. 2011 116.138 -23.831 – – – –
Piskunov et al. 2008 116.146 -23.859 – – – –
Kharchenko et al. 2007 116.13 -23.86 – 0.32 – 21.31
Piskunov et al. 2007 116.146 -23.859 – – – –
Ahumada & Lapasset 2007 116.125 -23.85 – – – –
van den Bergh 2006 116.15 -23.867 – – – –
Kharchenko et al. 2005 116.14 -23.86 – -3.76 3.91 21.31
Kharchenko et al. 2003 116.14 -23.87 – -3.04 3.73 –
Chen et al. 2003 116.22 -23.877 – -1.98 5.42 21.7
Dias et al. 2002 116.125 -23.857 – -3.24 3.29 22.08
Lynga 1987 116.157 -23.876 – – – –
Sulentic et al. 1973 116.14 -23.878 – – – –

💡 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– 1.03 0.14 0.44 568 -0.080 1251 0.32 0
Malhotra et al. 2026 1.03 0.07 – 640 -0.050 – – –
Otto et al. 2026 – – – 575 -0.100(15) – – –
Nizovkina et al. 2025 0.93(4) 0.14(4) – 697(4) -0.180(4) – – –
Li et al. 2025 1.00 0.06 – 750 -0.067 – – –
Hu & Soubiran 2025 – – – – -0.230(5) – – –
Wei et al. 2025 0.87 0.04 – 759 0.000 1251 0.32 –
Almeida et al. 2025 1.00 0.12 – 668 – 1762 – –
Hunt & Reffert 2024 – – – – – 2488(1) – –
Cavallo et al. 2024 0.99 0.09 – 631 0.190 – – –
He et al. 2023 1.70 0.45 – 100 – – – –
Hunt & Reffert 2023 0.94 0.07 0.44 740 – – – –
Cordoni et al. 2023 1.00 0.12 – 668 -0.051 1694 0.32 0(1)
Just et al. 2023 – – – 479 – 925 – –
He et al. 2022 – 0.05 – 708 – – – –
Spina et al. 2022 – – – – -0.080 – – –
Tarricq et al. 2022 0.99 – – 617 – – – –
Jadhav & Subramaniam 2021 1.02 0.05 – 575 – 2817 – 0(1)
Jaehnig et al. 2021 1.00(1) – – – – – – –
Netopil et al. 2022 1.06(1) – – 562 -0.080(1) – – –
Rain et al. 2021 1.00 0.13 – 380 – – – 1
Dias et al. 2021 1.00 0.12 – 668 -0.051 – – –
Spina et al. 2021 1.03 – – 575 -0.084(20) – – –
Cantat-Gaudin et al. 2020 1.02 0.05 – 575 – – – –
Kounkel et al. 2020 0.99 0.24 – 407 – – – –
Donor et al. 2020 – – – – -0.080 – – –
Cantat-Gaudin & Anders 2020 1.00 – – – – – – –
Liu & Pang 2019 – – – 1150 -0.500 – – –
Bossini et al. 2019 1.04 0.10 – 558 0.000 – – –
Soubiran et al. 2018 1.00 – – – – – – –
Cantat-Gaudin et al. 2018 1.00 – – – – – – –
Dib et al. 2018 1.04 – – 479 – – – –
Loktin & Popova 2017 1.06 0.14 – 393 – – – –
Joshi et al. 2016 1.04 0.16 – 479 – 389 – –
Kharchenko et al. 2016 1.04 0.16 – 479 – – – –
Netopil et al. 2016 8.57 – – 410 -0.050(2) – – –
Heiter et al. 2014 – – – – -0.030 – – –
Kharchenko et al. 2013 1.04 0.16 – 479 -0.095 – – –
Bukowiecki et al. 2012 – – – – – 1255 – –
Gozha et al. 2012 1.04 – – 387 -0.100 389 – –
Bukowiecki et al. 2011 0.98(1) 0.13 – 398 – – – –
Paunzen et al. 2010 – – – – -0.100 – – –
Piskunov et al. 2008 1.04 0.16 – 575 – 723(1) – –
Piskunov et al. 2007 1.04 0.16 – 575 – 264 – –
Ahumada & Lapasset 2007 – 0.16 – 389 – – – 3
van den Bergh 2006 1.04 0.16 – 389 – – – –
Kharchenko et al. 2005 1.04 0.16 – 575 – – – –
Kharchenko et al. 2003 1.37 0.16 – – – – – –
Chen et al. 2003 1.04 – – 380 – – – –
Dias et al. 2002 1.04 0.15 – 387 -0.100 – – –
Lynga 1987 1.10 0.16 – 98 0.000 – – –

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization
ℹī¸
NGC 2447 UCC
NGC 2447 HUNT23
NGC 2447 CANTAT20
Galactocentric position diagram