Alessi Teutsch 5

(ASCC 118; AT 5; Alessi 27; MWSC 3589)

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0.83 UTI
0.79
CN
1.0
Cdens
0.75
CC3
0.81
Clit
1.0
Cdup
N50 (P>50% members) 214
Stellar density (N50/rad) 23.8 [N/pc2]
C3 classification AB
  • CN 0.79 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.81 Well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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Alessi Teutsch 5 is a rich, very dense object of high C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption and age parameters (see Parameters). It is well-studied in the literature.

Note: This object shares a very small percentage of members with a later reported entry. See table with shared members information.

Liu et al. (2025)
Classified as primordial binary cluster 26 along with FSR_0369.

Palma et al. (2025)
Part of multiple system G81, along with HSC_816, FSR_0369, UBC_168 and HSC_789.

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

Piecka & Paunzen (2021)
Belongs cluster aggregate 'to' Agg08 along with BDSB30.

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 5 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– 332.152 61.103 1.115 -1.901 -3.272 -22.755
Almeida et al. 2025 332.274 61.096 – – – –
Alfonso et al. 2024 333.452 61.239 1.091 -1.391 -3.114 –
Hunt & Reffert 2024 332.043 61.052 1.126 -1.88 -3.329 -22.773
Celli et al. 2024 332.218 61.103 – – – –
Cavallo et al. 2024 332.085 61.065 1.123 – – –
Hunt & Reffert 2023 332.043 61.052 1.126 -1.88 -3.329 -22.773
He et al. 2022 333.275 61.36 1.114 -1.43 -3.086 –
Dias et al. 2021 332.274 61.096 1.127 -1.943 -3.205 –
Cantat-Gaudin et al. 2020 332.218 61.103 1.111 -1.895 -3.207 –
Cantat-Gaudin & Anders 2020 332.218 61.103 1.111 -1.895 -3.207 –
Dias et al. 2019 332.217 61.103 1.111 -1.895 -3.207 -5.04
Soubiran et al. 2018 332.218 61.103 – – – -21.04
Bica et al. 2019 332.108 61.03 – – – –
Cantat-Gaudin et al. 2018 332.218 61.103 1.111 -1.895 -3.207 –
Dias et al. 2018 – – – -2.36 -2.0 –
Dib et al. 2018 332.115 61.095 – – – –
Loktin & Popova 2017 332.115 61.028 – -1.017 -0.935 -42.0
Sampedro et al. 2017 332.113 61.028 -0.76 -2.51 – –
Dias et al. 2014 332.112 61.028 – -0.96 -2.81 –
Gozha et al. 2012 332.112 61.028 – – – –
Piskunov et al. 2008 332.087 61.096 – – – –
Kharchenko et al. 2007 332.1 61.1 – 0.21 – -42.0
Kharchenko et al. 2005 332.1 61.1 – -2.19 -4.03 -42.0
Dias et al. 2002 332.113 61.028 – -0.96 -2.81 -42.0

💡 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– 0.885 1.055 1.29 12 -0.141 269 – –
Liu et al. 2025 1.31 0.40 – 13 – – – –
Almeida et al. 2025 0.87 1.25 – 12 – 453 – –
Alfonso et al. 2024 0.86 1.02 – 14 -0.050 – – –
Hunt & Reffert 2024 – – – – – 222(1) – –
Celli et al. 2024 – – – 19 – 316 – –
Cavallo et al. 2024 0.89 1.41 – 5 -0.230 – – –
Hunt & Reffert 2023 0.87 0.91 1.29 6 – – – –
He et al. 2022 – 1.10 – 2 – – – –
Dias et al. 2021 0.87 1.25 – 12 -0.053 – – –
Cantat-Gaudin et al. 2020 0.91 1.02 – 19 – – – –
Kounkel et al. 2020 0.85 1.19 – 14 – – – –
Cantat-Gaudin & Anders 2020 0.88 – – – – – – –
Dias et al. 2019 0.80 1.26 – 13 -0.404 – – –
Soubiran et al. 2018 0.88 – – – – – – –
Cantat-Gaudin et al. 2018 0.88 – – – – – – –
Dib et al. 2018 1.03 – – 74 – – – –
Loktin & Popova 2017 1.08 1.09 – 26 – – – –
Gozha et al. 2012 0.90 – – 10 – 95 – –
Piskunov et al. 2008 0.90 0.95 – 10 – – – –
Kharchenko et al. 2005 0.90 0.95 – 10 – – – –
Dias et al. 2002 0.90 0.95 – 10 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
HSC 813 1.4 331.59 61.2 0.85 -1.5 -3.02 -10.39 0.18

💡 Note: The % column shows the percentage of members that Alessi Teutsch 5 shares with each listed object.

Visualization
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Alessi Teutsch 5 UCC
Alessi Teutsch 5 HUNT23
Alessi Teutsch 5 CANTAT20
Galactocentric position diagram