NGC 744

(Collinder 22; MWSC 153; FSR 0574; FoF 669)

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0.91 UTI
0.81
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
Nm (P>50%) 261
Core radius and density 1.5 [pc], 9.8 [pc-2]
C3 classification AB
  • CN 0.81 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 MOCAMOCA πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
NGC 744 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a 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.

Palma et al. (2025)
Classified as optical pair P555, along with Stock_4.

Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: good fit. Silver 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=0.1517, e_all=0.0975.

Ahumada & Lapasset (2007)
Star 7 has a spectrum A05 (1965ApJS...12..215H).

Data
πŸ” Search references for NGC 744 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 29.651 55.471 0.733 -1.865 -1.871 -25.861
Li et al. 2025 29.652 55.473 0.729 -1.864 -1.79 –
Yang et al. 2025 29.642 55.481 – – – –
Almeida et al. 2025 29.66 55.475 – – – –
Zhang et al. 2024 29.642 55.481 – – – –
Hunt & Reffert 2024 29.642 55.481 0.721 -1.869 -1.883 -27.237
Cavallo et al. 2024 29.638 55.474 0.724 – – –
Hunt & Reffert 2023 29.642 55.481 0.721 -1.869 -1.883 -27.237
Almeida et al. 2023 29.655 55.48 – – – –
Just et al. 2023 29.634 55.475 – – – –
Tarricq et al. 2022 29.645 55.459 0.714 -1.837 -1.885 –
Jaehnig et al. 2021 29.663 55.471 0.761 -1.876 -1.737 –
Rain et al. 2021 29.652 55.473 0.729 -1.864 -1.79 –
Richer et al. 2021 29.663 55.469 0.73 -1.871 -1.738 –
Dias et al. 2021 29.66 55.475 0.732 -1.885 -1.804 –
Cantat-Gaudin et al. 2020 29.652 55.473 0.729 -1.864 -1.79 –
SΓ‘nchez et al. 2020 29.637 55.473 – -1.735 -1.431 –
Zhong et al. 2020 29.652 55.473 – -1.864 -1.79 -39.11
Cantat-Gaudin & Anders 2020 29.652 55.473 0.729 -1.864 -1.79 –
Liu & Pang 2019 29.656 55.485 0.729 -1.872 -1.763 –
Soubiran et al. 2018 29.652 55.473 – – – -25.47
Bica et al. 2019 29.669 55.478 – – – –
Cantat-Gaudin et al. 2018 29.652 55.473 0.729 -1.864 -1.79 –
Dias et al. 2018 – – – -1.66 -1.67 –
Dib et al. 2018 29.644 55.478 – – – –
Loktin & Popova 2017 29.64 55.473 – 0.021 -1.35 –
Sampedro et al. 2017 29.637 55.473 – -2.69 -2.36 –
Joshi et al. 2016 29.644 55.478 – – – –
Kharchenko et al. 2016 29.634 55.475 – – – –
Dias et al. 2014 29.637 55.473 – -2.97 -2.01 –
Kharchenko et al. 2013 29.644 55.478 – -0.3 -3.92 –
Kharchenko et al. 2012 29.644 55.478 – -0.81 -4.01 –
Bukowiecki et al. 2011 29.7 55.462 – – – –
Piskunov et al. 2008 29.626 55.464 – – – –
Piskunov et al. 2007 29.626 55.464 – – – –
Ahumada & Lapasset 2007 29.625 55.467 – – – –
van den Bergh 2006 29.65 55.467 – – – –
Kharchenko et al. 2005 29.64 55.47 – -2.85 -3.15 –
Kharchenko et al. 2003 29.65 55.47 – -1.8 -3.81 –
Dias et al. 2002 29.637 55.473 – -1.34 1.15 –
Dambis 1999 29.65 55.467 – – – –
Lynga 1987 29.614 55.476 – – – –
Sulentic et al. 1973 29.645 55.471 – – – –

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] Bfrac BSS
UCC 99999– 1.32 1.2 1.81 237 -0.154 280 0.53 0
Li et al. 2025 1.17 0.85 – 646 -0.247 – – –
Yang et al. 2025 – – – 347 -0.210(3) – – –
Almeida et al. 2025 1.26 1.12 – 182 – 244 – –
Zhang et al. 2024 – – – – -0.142(1) – – –
Hunt & Reffert 2024 1.30 0.91 1.81 344 – 832(1) – –
Cavallo et al. 2024 1.44 1.22 – 257 0.180 – – –
Hunt & Reffert 2023 1.30 0.91 1.81 344 – – – –
Almeida et al. 2023 1.26 1.27 – 220 -0.046 315(1) 0.53 –
Just et al. 2023 – – – 237 – 601 – –
Tarricq et al. 2022 1.33 – – 162 – – – –
Jaehnig et al. 2021 1.31(1) – – – – – – –
Rain et al. 2021 1.32 1.20 – 174 – – – 0
Richer et al. 2021 – 0.99 – – – – – –
Dias et al. 2021 1.26 1.12 – 182 0.019 – – –
Cantat-Gaudin et al. 2020 1.37 0.84 – 135 – – – –
Kounkel et al. 2020 1.33 1.14 – 347 – – – –
Zhong et al. 2020 1.32(1) 1.20 – 8375 -0.166 – – –
Cantat-Gaudin & Anders 2020 1.32 – – – – – – –
Liu & Pang 2019 – – – 479 -0.500 – – –
Soubiran et al. 2018 1.32 – – – – – – –
Cantat-Gaudin et al. 2018 1.32 – – – – – – –
Dib et al. 2018 1.38 – – 237 – – – –
Loktin & Popova 2017 1.25 1.20 – 176 – – – –
Joshi et al. 2016 1.38 1.20 – 237 – 219 – –
Kharchenko et al. 2016 1.38 1.20 – 237 – – – –
Kharchenko et al. 2013 1.38 1.20 – 237 – – – –
Bukowiecki et al. 2012 – – – – – 424 – –
Kharchenko et al. 2012 1.38 1.20 – 237 – – – –
Bukowiecki et al. 2011 1.45(1) 1.23 – 112 – – – –
Piskunov et al. 2008 1.21 1.20 – 257 – 56(1) – –
Piskunov et al. 2007 1.21 1.20 – 257 – 15 – –
Ahumada & Lapasset 2007 – 1.20 – 178 – – – 1
van den Bergh 2006 1.21 1.20 – 178 – – – –
Kharchenko et al. 2005 1.21 1.20 – 257 – – – –
Kharchenko et al. 2003 1.20 1.20 – – – – – –
Dias et al. 2002 1.21 1.21 – 177 – – – –
Dambis 1999 1.04 1.58 – 126 – – – –
Lynga 1987 1.50 1.20 – 39 – – – –

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

Visualization
ℹ️
NGC 744 UCC
NGC 744 HUNT23
NGC 744 CANTAT20
Galactocentric position diagram