Alessi 37

(ASCC 124; MWSC 3663; LISC 3390)

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0.95 UTI
0.76
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 129
Stellar density (N50/rad) 11.2 [N/pc2]
C3 classification AA
  • CN 0.76 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 37 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, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Yan et al. (2026)
Number of WDs: expected from single-star evolution N=5, with probability of formation through binary evolution >=0.5 N=1.

Almeida et al. (2025)
Mass determination: good 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 11.6, 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.

Data
🔍 Search references for Alessi 37 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– 341.958 46.314 1.413 0.352 -1.659 -15.267
Yan et al. 2026 341.971 46.29 1.384 0.335 -1.643 –
Li et al. 2025 341.961 46.342 1.384 0.351 -1.569 –
Wei et al. 2025 341.916 46.366 1.421 0.354 -1.673 –
Almeida et al. 2025 342.019 46.328 – – – –
Alfonso et al. 2024 -18.107 46.39 1.354 0.333 -1.705 –
Zhang et al. 2024 341.971 46.29 – – – –
Hunt & Reffert 2024 341.971 46.29 1.384 0.335 -1.643 -13.91
Cavallo et al. 2024 341.898 46.506 1.381 – – –
Hunt & Reffert 2023 341.971 46.29 1.384 0.335 -1.643 -13.91
Almeida et al. 2023 341.94 46.341 – – – –
Just et al. 2023 341.888 46.306 – – – –
He et al. 2022 341.937 46.308 1.414 0.354 -1.677 –
Tarricq et al. 2022 341.968 46.33 1.411 0.34 -1.669 –
Richer et al. 2021 341.959 46.322 1.373 0.32 -1.577 –
Dias et al. 2021 342.019 46.328 1.375 0.355 -1.579 -10.602
Cantat-Gaudin et al. 2020 341.961 46.342 1.384 0.351 -1.569 –
Zhong et al. 2020 341.961 46.342 – 0.351 -1.569 -16.543
Cantat-Gaudin & Anders 2020 341.961 46.342 1.384 0.351 -1.569 –
Bossini et al. 2019 341.942 46.337 – – – –
Soubiran et al. 2018 341.961 46.342 – – – -10.48
Bica et al. 2019 342.025 46.252 – – – –
Cantat-Gaudin et al. 2018 341.961 46.342 1.384 0.351 -1.569 –
Dias et al. 2018 – – – -3.19 -2.75 –
Dib et al. 2018 341.895 46.31 – – – –
Loktin & Popova 2017 342.03 46.252 – -0.82 -2.75 –
Sampedro et al. 2017 342.033 46.252 -0.3 -3.46 – –
Joshi et al. 2016 341.895 46.31 – – – –
Kharchenko et al. 2016 341.888 46.306 – – – –
Dias et al. 2014 342.033 46.252 – -0.82 -2.75 –
Kharchenko et al. 2013 341.895 46.31 – 0.14 -0.78 –
Kharchenko et al. 2012 341.895 46.31 – 0.41 -0.78 –
Piskunov et al. 2008 342.026 46.252 – – – –
Piskunov et al. 2007 342.026 46.252 – – – –
Kharchenko et al. 2005 342.03 46.25 – 1.34 -2.41 –
Dias et al. 2002 342.033 46.252 – -0.82 -2.75 –

💡 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– 0.7 0.55 1.15 170 0.029 251 0.355 –
Yan et al. 2026 – – – 138 – – – –
Li et al. 2025 0.71 0.54 – 233 0.062 – – –
Wei et al. 2025 1.09 1.07 – 44 0.000 463 0.19 –
Almeida et al. 2025 0.71 0.68 – 232 – 331 – –
Alfonso et al. 2024 0.70 0.47 – 182 0.061 – – –
Zhang et al. 2024 – – – – -0.065(1) – – –
Hunt & Reffert 2024 – – – – – 331(1) – –
Cavallo et al. 2024 0.73 0.58 – 204 0.340 – – –
Hunt & Reffert 2023 0.69 0.41 1.15 125 – – – –
Almeida et al. 2023 0.70 0.65 – 261 -0.009 309(1) 0.52 –
Deng & Li 2023 0.51 0.54 – 400 -0.234 – – –
Just et al. 2023 – – – 157 – 38 – –
He et al. 2022 – 0.80 – 79 – – – –
Tarricq et al. 2022 0.68 – – 145 – – – –
Richer et al. 2021 – 0.59 – 300 – – – –
Dias et al. 2021 0.71 0.68 – 232 0.063 – – –
Cantat-Gaudin et al. 2020 0.70 0.47 – 138 – – – –
Kounkel et al. 2020 0.70 0.64 – 158 – – – –
Zhong et al. 2020 0.71(1) 0.47 – 8480 0.057 – – –
Cantat-Gaudin & Anders 2020 0.71 – – – – – – –
Bossini et al. 2019 0.69 0.53 – 112 0.000 – – –
Soubiran et al. 2018 0.71 – – – – – – –
Cantat-Gaudin et al. 2018 0.71 – – – – – – –
Dib et al. 2018 0.70 – – 157 – – – –
Loktin & Popova 2017 0.51 0.47 – 302 – – – –
Joshi et al. 2016 0.70 0.56 – 157 – 74 – –
Kharchenko et al. 2016 0.70 0.56 – 157 – – – –
Kharchenko et al. 2013 0.70 0.56 – 157 – – – –
Kharchenko et al. 2012 0.70 0.56 – 155 – – – –
Piskunov et al. 2008 0.60 0.47 – 302 – 193(1) – –
Piskunov et al. 2007 0.60 0.47 – 302 – 51 – –
Kharchenko et al. 2005 0.60 0.47 – 302 – – – –
Dias et al. 2002 0.60 0.47 – 302 – – – –

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

Visualization
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Alessi 37 UCC
Alessi 37 HUNT23
Alessi 37 CANTAT20
Galactocentric position diagram