VDBH 221

(vdB-Hagen 221; vdBergh-Hagen 221; BH 221; MWSC 2563; ESO 454 06)

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0.92 UTI
0.84
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 340
Radius (P>50% members) 8.6 [arcmin]
  • CN 0.84 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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VDBH 221 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is very well-studied in the literature.

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

Close Low extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for VDBH 221 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 – 259.625 -32.369 0.895 1.958 -1.571 5.712
Almeida et al. 2025 259.649 -32.312 – – – –
Hunt & Reffert 2024 259.594 -32.39 0.894 1.97 -1.572 0.267
Celli et al. 2024 259.641 -32.334 – – – –
Cavallo et al. 2024 259.627 -32.36 0.905 – – –
Hunt & Reffert 2023 259.594 -32.39 0.894 1.97 -1.572 0.267
Just et al. 2023 259.655 -32.33 – – – –
He et al. 2022 259.6 -32.374 0.912 1.981 -1.61 –
Dias et al. 2021 259.649 -32.312 0.887 2.007 -1.586 –
Cantat-Gaudin et al. 2020 259.641 -32.334 0.884 2.0 -1.568 –
Cantat-Gaudin & Anders 2020 259.641 -32.334 0.884 2.0 -1.568 –
Soubiran et al. 2018 259.641 -32.334 – – – -4.79
Bica et al. 2019 259.657 -32.322 – – – –
Cantat-Gaudin et al. 2018 259.641 -32.334 0.884 2.0 -1.568 –
Kharchenko et al. 2016 259.655 -32.33 – – – –
Dias et al. 2014 259.663 -32.317 – -2.22 -3.37 –
Kharchenko et al. 2013 259.665 -32.33 – 2.35 -4.0 6.3
Gozha et al. 2012 259.662 -32.317 – – – –
Piskunov et al. 2008 259.653 -32.344 – – – –
Kharchenko et al. 2007 259.66 -32.32 – 0.23 – 6.33
Piskunov et al. 2007 259.653 -32.344 – – – –
Kharchenko et al. 2005 259.66 -32.34 – 2.84 -3.1 6.33
Kharchenko et al. 2003 259.59 -32.39 – 5.1 -3.71 –
Dias et al. 2002 259.663 -32.317 – -2.22 -3.37 8.86

💡 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 1.05 1.04 – 12 – 549 – –
Hunt & Reffert 2024 – – – – – 857* – –
Celli et al. 2024 – – – 11 – 516 – –
Cavallo et al. 2024 0.93 1.33 – 7 -0.200 – – –
Hunt & Reffert 2023 1.06 1.11 2.22 5 – – – –
Just et al. 2023 – – – 63 – 64 – –
He et al. 2022 – 1.50 – 6 – – – –
Dias et al. 2021 1.05 1.04 – 12 0.002 – – –
Cantat-Gaudin et al. 2020 1.21 1.09 – 11 – – – –
Cantat-Gaudin & Anders 2020 1.10 – – – – – – –
Soubiran et al. 2018 1.10 – – – – – – –
Cantat-Gaudin et al. 2018 1.10 – – – – – – –
Kharchenko et al. 2016 0.81 0.62 – 63 – – – –
Kharchenko et al. 2013 0.81 0.62 – 63 – – – –
Gozha et al. 2012 0.83 – – 102 – 162 – –
Piskunov et al. 2008 0.75 0.62 – 102 – 135* – –
Piskunov et al. 2007 0.75 0.62 – 102 – 32 – –
Kharchenko et al. 2005 0.75 0.62 – 102 – – – –
Kharchenko et al. 2003 0.83 0.62 – – – – – –
Dias et al. 2002 0.75 0.62 – 102 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OC 0691 10.9 259.63 -32.38 0.96 1.86 -1.62 -2.14 0.0

💡 Note: The % column shows the percentage of members that VDBH 221 shares with each listed object.

Visualization
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VDBH 221 UCC
VDBH 221 HUNT23
VDBH 221 CANTAT20
Galactocentric position diagram