Alessi 44

(ASCC 106; MWSC 3164)

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0.53 UTI
0.0
CN
0.13
Cdens
0.5
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 18
Stellar density (N50/rad) 0.7 [N/pc2]
C3 classification BB
  • CN 0.0 Sparse
  • Cdens 0.13 Very loose
  • CC3 0.5 Intermediate 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 44 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, below the mid-plane, affected by moderate 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.

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

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Alessi 44 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 294.825 1.765 1.524 0.399 -2.272 -13.059
Li et al. 2025 295.325 1.592 1.496 0.463 -2.325 –
Almeida et al. 2025 295.286 1.494 – – – –
Alfonso et al. 2024 294.958 1.349 1.465 0.486 -2.438 –
Hunt & Reffert 2024 295.792 1.563 1.327 0.81 -2.493 -15.384
Cavallo et al. 2024 295.582 1.421 1.324 – – –
Hunt & Reffert 2023 295.792 1.563 1.327 0.81 -2.493 -15.384
Just et al. 2023 295.823 1.618 – – – –
Dias et al. 2021 295.286 1.494 1.505 0.491 -2.327 -9.767
Cantat-Gaudin et al. 2020 295.325 1.592 1.496 0.463 -2.325 –
Cantat-Gaudin & Anders 2020 295.325 1.592 1.496 0.463 -2.325 –
Soubiran et al. 2018 295.325 1.592 – – – -9.8
Bica et al. 2019 295.638 1.525 – – – –
Cantat-Gaudin et al. 2018 295.325 1.592 1.496 0.463 -2.325 –
Loktin & Popova 2017 295.635 1.523 – -1.232 -7.051 -62.2
Kharchenko et al. 2016 295.823 1.618 – – – –
Dias et al. 2014 295.638 1.523 – -0.5 -3.36 –
Kharchenko et al. 2013 295.83 1.62 – -1.9 -2.9 -62.2
Gozha et al. 2012 295.637 1.523 – – – –
Piskunov et al. 2008 295.777 1.596 – – – –
Kharchenko et al. 2007 295.78 1.6 – 0.66 – -62.2
Kharchenko et al. 2005 295.78 1.6 – -1.16 -2.74 –
Dias et al. 2002 295.637 1.523 – -1.16 -2.74 -62.2

💡 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– 0.66 1.07 0.58 244 0.043 324 – –
Li et al. 2025 0.68 0.74 – 75 0.056 – – –
Almeida et al. 2025 0.67 1.07 – 114 – 563 – –
Alfonso et al. 2024 0.68 0.71 – 218 0.030 – – –
Hunt & Reffert 2024 – – – – – 73(1) – –
Cavallo et al. 2024 0.76 1.19 – 145 0.500 – – –
Hunt & Reffert 2023 0.72 1.22 0.58 123 – – – –
Just et al. 2023 – – – 263 – 86 – –
Tarricq et al. 2022 0.67 – – 224 – – – –
Dias et al. 2021 0.67 1.07 – 114 0.029 – – –
Cantat-Gaudin et al. 2020 0.68 0.71 – 224 – – – –
Cantat-Gaudin & Anders 2020 0.66 – – – – – – –
Soubiran et al. 2018 0.66 – – – – – – –
Cantat-Gaudin et al. 2018 0.66 – – – – – – –
Loktin & Popova 2017 0.65 1.75 – 306 – – – –
Kharchenko et al. 2016 0.53 0.97 – 263 – – – –
Kharchenko et al. 2013 0.53 0.97 – 263 – – – –
Gozha et al. 2012 0.50 – – 263 – 603 – –
Piskunov et al. 2008 0.50 1.08 – 263 – – – –
Kharchenko et al. 2005 0.50 1.08 – 263 – – – –
Dias et al. 2002 0.50 1.08 – 263 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OC 0069 44.0 294.77 2.28 1.5 0.26 -2.23 -9.39 0.1

💡 Note: The % column shows the percentage of members that Alessi 44 shares with each listed object.

Visualization
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Alessi 44 UCC
Alessi 44 HUNT23
Alessi 44 CANTAT20
Galactocentric position diagram