Alessi Teutsch 9

(ASCC 10; MWSC 275; AT 9)

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0.93 UTI
0.72
CN
0.95
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 94
Stellar density (N50/rad) 4.8 [N/pc2]
C3 classification AA
  • CN 0.72 Moderately populated
  • Cdens 0.95 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 9 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a close distance, below 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 metallicity parameters (see Parameters). It is very well-studied in the literature.

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Alessi Teutsch 9 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 51.827 34.88 1.506 -1.78 -1.426 -18.531
Li et al. 2025 51.87 34.981 1.459 -1.737 -1.368 –
Almeida et al. 2025 51.874 35.011 – – – –
Alfonso et al. 2024 51.784 34.847 1.45 -1.816 -1.47 –
Zhang et al. 2024 51.863 34.886 – – – –
Hunt & Reffert 2024 51.863 34.886 1.507 -1.853 -1.359 -16.806
Cavallo et al. 2024 51.033 35.538 1.51 – – –
Hunt & Reffert 2023 51.863 34.886 1.507 -1.853 -1.359 -16.806
Almeida et al. 2023 51.906 35.011 – – – –
Just et al. 2023 51.756 35.028 – – – –
He et al. 2022 51.858 34.897 1.518 -1.779 -1.43 –
Tarricq et al. 2022 51.807 34.945 1.491 -1.839 -1.396 –
Dias et al. 2021 51.874 35.011 1.465 -1.704 -1.348 -10.87
Cantat-Gaudin et al. 2020 51.87 34.981 1.459 -1.737 -1.368 –
Cantat-Gaudin & Anders 2020 51.87 34.981 1.459 -1.737 -1.368 –
Bossini et al. 2019 51.87 34.981 – – – –
Soubiran et al. 2018 51.87 34.981 – – – -15.67
Bica et al. 2019 51.864 34.947 – – – –
Cantat-Gaudin et al. 2018 51.87 34.981 1.459 -1.737 -1.368 –
Kharchenko et al. 2016 51.756 35.028 – – – –
Dias et al. 2014 51.862 34.953 – 1.17 -2.05 –
Kharchenko et al. 2013 51.765 35.03 – -2.9 -1.6 –
Kharchenko et al. 2012 51.765 35.03 – -2.9 -1.6 –
Piskunov et al. 2008 51.739 35.034 – – – –
Kharchenko et al. 2005 51.75 35.04 – -3.08 -1.01 –
Dias et al. 2002 51.862 34.953 – -3.08 -1.01 –

💡 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– 0.67 0.63 1.09 376 0.004 180 0.45 –
Li et al. 2025 0.63 0.69 – 385 -0.041 – – –
Almeida et al. 2025 0.64 0.82 – 151 – 146 – –
Alfonso et al. 2024 0.66 0.63 – 368 0.109 – – –
Zhang et al. 2024 – – – – -0.016(1) – – –
Hunt & Reffert 2024 – – – – – 153(1) – –
Cavallo et al. 2024 0.67 0.89 – 95 0.300 – – –
Hunt & Reffert 2023 0.63 0.70 1.09 78 – – – –
Almeida et al. 2023 0.64 0.79 – 196 0.004 229(1) 0.45 –
Just et al. 2023 – – – 521 – 207 – –
He et al. 2022 – 0.75 – 79 – – – –
Tarricq et al. 2022 0.65 – – 263 – – – –
Dias et al. 2021 0.64 0.82 – 151 0.109 – – –
Cantat-Gaudin et al. 2020 0.66 0.63 – 263 – – – –
Cantat-Gaudin & Anders 2020 0.67 – – – – – – –
Bossini et al. 2019 0.61 0.44 – 397 0.000 – – –
Soubiran et al. 2018 0.67 – – – – – – –
Cantat-Gaudin et al. 2018 0.67 – – – – – – –
Kharchenko et al. 2016 0.70 0.31 – 521 – – – –
Kharchenko et al. 2013 0.70 0.31 – 521 – – – –
Kharchenko et al. 2012 0.70 0.31 – 521 – – – –
Piskunov et al. 2008 0.70 0.31 – 447 – – – –
Kharchenko et al. 2005 0.70 0.31 – 447 – – – –
Dias et al. 2002 0.70 0.31 – 447 – – – –

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

Visualization
ℹī¸
Alessi Teutsch 9 UCC
Alessi Teutsch 9 HUNT23
Alessi Teutsch 9 CANTAT20
Galactocentric position diagram