Alessi 59

(MWSC 1004; DSH J0652.3+0211)

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0.76 UTI
0.39
CN
1.0
Cdens
0.75
CC3
0.82
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 39
Radius (P>50% members) 1.6 [arcmin]
  • CN 0.39 Poorly populated
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.82 Well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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Alessi 59 is a poorly populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is well-studied in the literature.
Distant Moderate extinction Near-solar metallicity Young

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

Data
🔍 Search references for Alessi 59 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 – 103.072 2.194 0.237 -0.525 0.166 –
Almeida et al. 2025 103.071 2.197 – – – –
Hunt & Reffert 2024 103.075 2.197 0.218 -0.547 0.005 68.644
Celli et al. 2024 103.078 2.191 – – – –
Just et al. 2023 103.081 2.192 – – – –
Dias et al. 2021 103.071 2.197 0.199 -0.604 0.22 –
Cantat-Gaudin et al. 2020 103.078 2.196 0.227 -0.54 0.283 –
Cantat-Gaudin & Anders 2020 103.078 2.196 0.227 -0.54 0.283 –
Bica et al. 2019 103.075 2.191 – – – –
Cantat-Gaudin et al. 2018 103.078 2.196 0.227 -0.54 0.283 –
Loktin & Popova 2017 103.08 2.191 – 0.08 -0.986 –
Kharchenko et al. 2016 103.081 2.192 – – – –
Dias et al. 2014 103.079 2.191 – -2.17 0.48 –
Kharchenko et al. 2013 103.087 2.19 – 0.85 -2.37 –
Kronberger et al. 2006 103.078 2.191 – – – –
Dias et al. 2002 103.079 2.191 – 0.85 -2.37 –

💡 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] Bfr BSS
Almeida et al. 2025 4.39 1.62 – 569 – 155 – –
Hunt & Reffert 2024 – – – – – 174* – –
Celli et al. 2024 – – – 10 – 201 – –
Just et al. 2023 – – – 10 – 548 – –
Dias et al. 2021 4.39 1.62 – 569 -0.094 – – –
Cantat-Gaudin & Anders 2020 3.90 – – – – – – –
Cantat-Gaudin et al. 2018 3.90 – – – – – – –
Loktin & Popova 2017 4.24 1.31 – 174 – – – –
Kharchenko et al. 2016 3.51 2.39 – 10 – – – –
Kharchenko et al. 2013 3.51 2.39 – 10 – – – –
Dias et al. 2002 3.50 1.83 – 40 – – – –

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization
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Alessi 59 UCC
Alessi 59 CANTAT20
Galactocentric position diagram