Alessi Teutsch 8

(ASCC 68; MWSC 1993; AT 8; FoF 2239)

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0.97 UTI
0.83
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 317
Stellar density (N50/rad) 22.9 [N/pc2]
C3 classification AA
  • CN 0.83 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¸
Alessi Teutsch 8 is a 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 near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Alessi Teutsch 8 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 180.663 -60.939 0.985 -6.642 1.666 -18.849
Li et al. 2025 180.649 -60.935 0.967 -6.625 1.63 –
Wei et al. 2025 180.635 -60.935 0.99 -6.645 1.681 –
Almeida et al. 2025 180.649 -60.948 – – – –
Hunt & Reffert 2024 180.703 -60.953 0.989 -6.645 1.672 -23.68
Cavallo et al. 2024 180.672 -60.955 0.989 – – –
Hunt & Reffert 2023 180.703 -60.953 0.989 -6.645 1.672 -23.68
Just et al. 2023 180.703 -60.917 – – – –
He et al. 2022 180.662 -60.938 0.991 -6.64 1.681 –
Tarricq et al. 2022 180.671 -60.902 0.982 -6.647 1.667 –
Dias et al. 2021 180.649 -60.948 0.971 -6.629 1.636 -15.38
Cantat-Gaudin et al. 2020 180.649 -60.935 0.967 -6.625 1.63 –
Cantat-Gaudin & Anders 2020 180.649 -60.935 0.967 -6.625 1.63 –
Liu & Pang 2019 180.66 -60.94 0.972 -6.611 1.627 –
Soubiran et al. 2018 180.649 -60.935 – – – -15.35
Bica et al. 2019 180.73 -60.928 – – – –
Cantat-Gaudin et al. 2018 180.649 -60.935 0.967 -6.625 1.63 –
Loktin & Popova 2017 180.735 -60.924 – -3.579 -1.817 –
Kharchenko et al. 2016 180.703 -60.917 – – – –
Dias et al. 2014 180.729 -60.925 – -4.71 -0.11 –
Kharchenko et al. 2013 180.712 -60.92 – -4.63 3.0 –
Piskunov et al. 2008 180.733 -60.919 – – – –
Kharchenko et al. 2005 180.73 -60.92 – -4.81 3.71 –
Dias et al. 2002 180.729 -60.925 – -4.71 -0.11 –

💡 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– 0.96 0.485 0.78 190 0.250 864 0.33 –
Li et al. 2025 0.95 0.49 – 305 0.050 – – –
Wei et al. 2025 1.74 0.94 – 100 0.500 847 0.33 –
Almeida et al. 2025 0.97 0.63 – 190 – 882 – –
Hunt & Reffert 2024 – – – – – 1184(1) – –
Cavallo et al. 2024 0.98 0.47 – 372 0.400 – – –
Hunt & Reffert 2023 0.95 0.48 0.78 134 – – – –
Just et al. 2023 – – – 398 – 251 – –
He et al. 2022 – 0.85 – 79 – – – –
Tarricq et al. 2022 0.96 – – 115 – – – –
Dias et al. 2021 0.97 0.63 – 190 0.154 – – –
Cantat-Gaudin et al. 2020 0.99 0.49 – 117 – – – –
Cantat-Gaudin & Anders 2020 1.00 – – – – – – –
Liu & Pang 2019 – – – 93 0.250 – – –
Soubiran et al. 2018 1.00 – – – – – – –
Cantat-Gaudin et al. 2018 1.00 – – – – – – –
Loktin & Popova 2017 0.77 0.61 – 184 – – – –
Kharchenko et al. 2016 0.92 0.29 – 398 – – – –
Kharchenko et al. 2013 0.92 0.29 – 398 – – – –
Piskunov et al. 2008 0.65 0.31 – 447 – – – –
Kharchenko et al. 2005 0.65 0.31 – 447 – – – –
Dias et al. 2002 0.65 0.31 – 447 – – – –

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

Visualization
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Alessi Teutsch 8 UCC
Alessi Teutsch 8 HUNT23
Alessi Teutsch 8 CANTAT20
Galactocentric position diagram