SAI 24

(MWSC 249)

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0.91 UTI
0.8
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 224
Radius (P>50% members) 4.6 [arcmin]
  • CN 0.8 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 Very 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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SAI 24 is a rich, 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, very young cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is very well-studied in the literature.

Note: This object shares a significant percentage of members with 2 later reported entries. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Very young

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for SAI 24 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 – 44.826 60.571 0.448 -0.226 0.074 -49.279
Almeida et al. 2025 44.783 60.561 – – – –
Hunt & Reffert 2024 44.87 60.565 0.442 -0.239 0.052 -48.46
Celli et al. 2024 44.816 60.566 – – – –
Cavallo et al. 2024 44.772 60.572 0.448 – – –
Hunt & Reffert 2023 44.87 60.565 0.442 -0.239 0.052 -48.46
Almeida et al. 2023 44.792 60.56 – – – –
Just et al. 2023 44.852 60.548 – – – –
Dias et al. 2021 44.783 60.561 0.444 -0.225 0.106 –
Cantat-Gaudin et al. 2020 44.816 60.566 0.446 -0.201 0.114 –
Cantat-Gaudin & Anders 2020 44.816 60.566 0.446 -0.201 0.114 –
Soubiran et al. 2018 44.816 60.566 – – – -3.64
Cantat-Gaudin et al. 2018 44.816 60.566 0.446 -0.201 0.114 –
Kharchenko et al. 2016 44.852 60.548 – – – –
Dias et al. 2014 44.854 60.566 – -0.99 1.17 –
Kharchenko et al. 2013 44.865 60.55 – -1.42 -0.2 -40.0
Kharchenko et al. 2012 44.865 60.55 – -1.42 -0.2 -40.0
Glushkova et al. 2010 44.856 60.566 – – – –
Dias et al. 2002 44.854 60.566 – -0.99 1.17 -40.0

💡 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] Bfr BSS
Almeida et al. 2025 1.93 1.98 – 13 – 627 – –
Hunt & Reffert 2024 – – – – – 1173* – –
Celli et al. 2024 – – – 7 – 627 – –
Cavallo et al. 2024 1.89 1.99 – 5 -0.190 – – –
Hunt & Reffert 2023 2.04 1.99 1.67 5 – – – –
Almeida et al. 2023 1.93 2.03 – 12 -0.016 1072* 0.76 –
Just et al. 2023 – – – 16 – 16 – –
Dias et al. 2021 1.93 1.98 – 13 0.157 – – –
Cantat-Gaudin et al. 2020 2.25 1.85 – 7 – – – –
Cantat-Gaudin & Anders 2020 2.10 – – – – – – –
Soubiran et al. 2018 2.10 – – – – – – –
Cantat-Gaudin et al. 2018 2.10 – – – – – – –
Kharchenko et al. 2016 1.00 1.55 – 16 – – – –
Kharchenko et al. 2013 1.00 1.55 – 16 – – – –
Kharchenko et al. 2012 1.00 1.55 – 16 – – – –
Dias et al. 2002 1.00 1.55 – 16 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
Collinder 34 53.6 44.83 60.57 0.44 -0.35 0.04 -55.55 0.18
CWNU 4436 4.5 44.87 60.57 0.23 -0.48 0.1 – 0.04

💡 Note: The % column shows the percentage of members that SAI 24 shares with each listed object.

Visualization
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SAI 24 UCC
SAI 24 HUNT23
SAI 24 CANTAT20
Galactocentric position diagram