Alessi 37

(ASCC 124; MWSC 3663; LISC 3390)

Click to load Aladin Lite
0.83 UTI
0.76
CN
0.39
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
Nm (P>50%) 129
Core radius and density 2.8 [pc], 2.0 [pc-2]
C3 classification AA
  • CN 0.76 Rich
  • Cdens 0.39 Loose
  • 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, loose 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.

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1351, e_all=0.0845.

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
ℹī¸
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 0.54 1.15 158 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 0.69 0.41 1.15 125 – 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
ℹī¸
Alessi 37 UCC
Alessi 37 HUNT23
Alessi 37 CANTAT20
Galactocentric position diagram