ASCC 12

(MWSC 427; FoF 2323)

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0.90 UTI
0.76
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 114
Stellar density (N50/rad) 11.5 [N/pc2]
C3 classification AB
  • CN 0.76 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 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¸
ASCC 12 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 low extinction. It is catalogued as a near-solar metallicity, intermediate-age 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.

Richer et al. (2021)
The expected number of WDs is 4.5, 0 WD candidates found, and 0 WD candidates found in the wide search.

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 2 along with HXHWL_18, and as tidal capture (resonant trapping binary) 46 along with COIN-Gaia_39, and of multiple system 2 along with COIN-Gaia_10, COIN-Gaia_39, HSC_1308 and HXHWL_18.

Palma et al. (2025)
Part of multiple system G110, along with COIN-Gaia_39, HXHWL_18 and HSC_1308.

Cavallo et al. (2024)
Gold sample.

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

Data
🔍 Search references for ASCC 12 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 72.396 41.743 0.944 -0.684 -2.943 -26.177
Liu et al. 2025 72.42 41.71 0.95 -0.68 -2.92 -26.14
Li et al. 2025 72.4 41.744 0.941 -0.634 -2.794 –
Almeida et al. 2025 72.433 41.784 – – – –
Zhang et al. 2024 72.421 41.714 – – – –
Hunt & Reffert 2024 72.421 41.714 0.955 -0.676 -2.916 -26.145
Cavallo et al. 2024 72.499 41.708 0.952 – – –
Hunt & Reffert 2023 72.421 41.714 0.955 -0.676 -2.916 -26.145
Almeida et al. 2023 72.46 41.803 – – – –
Just et al. 2023 72.471 41.719 – – – –
He et al. 2022 72.431 41.718 0.955 -0.684 -2.948 –
Tarricq et al. 2022 72.346 41.728 0.929 -0.619 -2.928 –
Richer et al. 2021 72.424 41.797 0.994 -0.577 -2.778 –
Dias et al. 2021 72.433 41.784 0.936 -0.616 -2.81 -69.436
Cantat-Gaudin et al. 2020 72.4 41.744 0.941 -0.634 -2.794 –
Zhong et al. 2020 72.4 41.744 – -0.634 -2.794 -10.626
Cantat-Gaudin & Anders 2020 72.4 41.744 0.941 -0.634 -2.794 –
Liu & Pang 2019 72.374 41.72 0.938 -0.586 -2.858 –
Bica et al. 2019 72.434 41.733 – – – –
Cantat-Gaudin et al. 2018 72.4 41.744 0.941 -0.634 -2.794 –
Kharchenko et al. 2016 72.471 41.719 – – – –
Dias et al. 2014 72.479 41.73 – -0.45 -1.97 –
Kharchenko et al. 2013 72.481 41.719 – -1.83 -2.1 –
Kharchenko et al. 2012 72.481 41.719 – -1.83 -2.1 –
Piskunov et al. 2008 72.472 41.731 – – – –
Kharchenko et al. 2005 72.48 41.73 – -0.62 -1.86 –
Dias et al. 2002 72.479 41.73 – -1.83 -2.1 –

💡 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– 1.005 0.7 0.83 263 -0.114 346 0.45 –
Liu et al. 2025 1.65 0.33 – 105 – – – –
Li et al. 2025 1.00 0.88 – 379 -0.156 – – –
Almeida et al. 2025 1.01 1.09 – 227 – 334 – –
Zhang et al. 2024 – – – – -0.151(1) – – –
Hunt & Reffert 2024 – – – – – 374(1) – –
Cavallo et al. 2024 1.06 0.99 – 339 0.000 – – –
Hunt & Reffert 2023 1.00 0.71 0.83 297 – – – –
Almeida et al. 2023 1.01 1.01 – 313 -0.112 359(1) 0.45 –
Just et al. 2023 – – – 427 – 14 – –
He et al. 2022 – 1.10 – 63 – – – –
Tarricq et al. 2022 1.02 – – 95 – – – –
Richer et al. 2021 – 0.74 – 93 – – – –
Dias et al. 2021 1.01 1.09 – 227 -0.114 – – –
Cantat-Gaudin et al. 2020 1.05 0.70 – 93 – – – –
Zhong et al. 2020 0.60 0.46 – 8630 -0.152 – – –
Cantat-Gaudin & Anders 2020 1.03 – – – – – – –
Liu & Pang 2019 – – – 129 0.500 – – –
Cantat-Gaudin et al. 2018 1.03 – – – – – – –
Kharchenko et al. 2016 0.60 0.46 – 427 – – – –
Kharchenko et al. 2013 0.60 0.46 – 427 – – – –
Kharchenko et al. 2012 0.60 0.46 – 427 – – – –
Piskunov et al. 2008 0.50 0.46 – 263 – – – –
Kharchenko et al. 2005 0.50 0.46 – 263 – – – –
Dias et al. 2002 0.50 0.46 – 263 – – – –

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

Visualization
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ASCC 12 UCC
ASCC 12 HUNT23
ASCC 12 CANTAT20
Galactocentric position diagram