Alessi Teutsch 3

(ASCC 42; MWSC 1373; AT 3; Alessi 30)

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0.91 UTI
0.76
CN
1.0
Cdens
1.0
CC3
0.9
Clit
1.0
Cdup
N50 (P>50% members) 115
Stellar density (N50/rad) 8.2 [N/pc2]
C3 classification AA
  • CN 0.76 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.9 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 3 is a rich, 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 parameter (see Parameters). It is very well-studied in the literature.

Palma et al. (2025)
Classified as optical pair P35, along with HSC_2154.

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: 1.00 (50th percentile).

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

Richer et al. (2021)
The expected number of WDs is 8.4, 0 WD candidates found, and 0 WD candidates found in the wide search.

Bica et al. (2019)
Web updates in DAML02, some were later removed (2003 to 2010). List of clusters and alike reported by B. Alessi. The Preliminary Amateur Open Cluster Catalog, Version 08/03/2003.

Data
🔍 Search references for Alessi Teutsch 3 in: SciX Simbad
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Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 118.295 -53.023 1.423 -5.389 8.937 9.545
Li et al. 2025 118.228 -53.022 1.417 -5.378 8.926 –
Wei et al. 2025 118.212 -53.025 1.43 -5.377 8.949 –
Almeida et al. 2025 118.237 -53.053 – – – –
Alfonso et al. 2024 118.167 -52.972 1.382 -5.309 8.906 –
Hunt & Reffert 2024 118.286 -53.001 1.421 -5.338 8.945 10.654
Cavallo et al. 2024 118.227 -53.048 1.422 – – –
Hunt & Reffert 2023 118.286 -53.001 1.421 -5.338 8.945 10.654
Almeida et al. 2023 118.25 -52.99 – – – –
Just et al. 2023 118.136 -52.992 – – – –
He et al. 2022 118.251 -53.032 1.426 -5.379 8.962 –
Tarricq et al. 2022 118.303 -53.011 1.428 -5.377 8.919 –
Richer et al. 2021 118.261 -53.058 1.39 -5.367 8.892 –
Dias et al. 2021 118.237 -53.053 1.423 -5.364 8.908 17.865
Cantat-Gaudin et al. 2020 118.228 -53.022 1.417 -5.378 8.926 –
Cantat-Gaudin & Anders 2020 118.228 -53.022 1.417 -5.378 8.926 –
Bossini et al. 2019 118.228 -53.022 – – – –
Soubiran et al. 2018 118.228 -53.022 – – – 16.59
Bica et al. 2019 118.253 -53.051 – – – –
Cantat-Gaudin et al. 2018 118.228 -53.022 1.417 -5.378 8.926 –
Dib et al. 2018 118.14 -52.995 – – – –
Loktin & Popova 2017 118.26 -53.044 – -1.918 8.792 15.0
Sampedro et al. 2017 118.254 -53.045 -4.42 5.63 – –
Joshi et al. 2016 118.14 -52.995 – – – –
Kharchenko et al. 2016 118.136 -52.992 – – – –
Dias et al. 2014 118.254 -53.045 – -4.23 5.11 –
Kharchenko et al. 2013 118.14 -52.995 – -3.67 8.21 –
Piskunov et al. 2008 118.215 -53.008 – – – –
Kharchenko et al. 2005 118.21 -53.01 – -3.76 8.25 –
Dias et al. 2002 118.254 -53.045 – -4.23 5.11 –

💡 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– 0.69 0.53 1.09 141 0.011 222 0.355 –
Li et al. 2025 0.70 0.60 – 104 0.059 – – –
Wei et al. 2025 0.86 0.77 – 54 0.000 270 0.29 –
Almeida et al. 2025 0.69 0.70 – 160 – 209 – –
Alfonso et al. 2024 0.69 0.47 – 107 0.011 – – –
Hunt & Reffert 2024 – – – – – 151(1) – –
Cavallo et al. 2024 0.71 0.74 – 115 0.210 – – –
Hunt & Reffert 2023 0.67 0.51 1.09 103 – – – –
Almeida et al. 2023 0.68 0.74 – 149 -0.039 235(1) 0.42 –
Just et al. 2023 – – – 141 – 28 – –
He et al. 2022 – 0.80 – 79 – – – –
Tarricq et al. 2022 0.68 – – 115 – – – –
Richer et al. 2021 – 0.53 – 400 – – – –
Dias et al. 2021 0.69 0.70 – 160 0.011 – – –
Cantat-Gaudin et al. 2020 0.69 0.47 – 105 – – – –
Kounkel et al. 2020 0.69 0.68 – 83 – – – –
Cantat-Gaudin & Anders 2020 0.69 – – – – – – –
Bossini et al. 2019 0.66 0.42 – 97 0.000 – – –
Soubiran et al. 2018 0.69 – – – – – – –
Cantat-Gaudin et al. 2018 0.69 – – – – – – –
Dib et al. 2018 0.79 – – 141 – – – –
Loktin & Popova 2017 0.88 0.75 – 618 – – – –
Joshi et al. 2016 0.79 0.53 – 141 – 617 – –
Kharchenko et al. 2016 0.79 0.53 – 141 – – – –
Kharchenko et al. 2013 0.79 0.53 – 141 – – – –
Piskunov et al. 2008 0.80 0.32 – 372 – – – –
Kharchenko et al. 2005 0.80 0.32 – 372 – – – –
Dias et al. 2002 0.80 0.32 – 372 – – – –

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

Visualization
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Alessi Teutsch 3 UCC
Alessi Teutsch 3 HUNT23
Alessi Teutsch 3 CANTAT20
Galactocentric position diagram