VDBH 23

(vdB-Hagen 23; vdBergh-Hagen 23; BH 23; OCSN 146)

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0.95 UTI
0.77
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 152
Radius (P>50% members) 21.5 [arcmin]
  • CN 0.77 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 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
VDBH 23 is a rich, very dense object of very high C3 quality. Its parallax locates it at a very close distance, near 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 absorption parameter (see Parameters). It is very well-studied in the literature.
Very close Low extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for VDBH 23 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 123.438 -36.317 2.272 -7.096 7.367 22.439
Li et al. 2025 123.449 -36.329 2.257 -7.101 7.35 –
Almeida et al. 2025 123.507 -36.242 – – – –
Alfonso et al. 2024 123.289 -35.729 2.272 -7.186 7.352 –
Hunt & Reffert 2024 123.448 -36.356 2.296 -7.183 7.317 21.61
Celli et al. 2024 123.449 -36.329 – – – –
Cavallo et al. 2024 123.31 -35.228 2.297 – – –
Hunt & Reffert 2023 123.448 -36.356 2.296 -7.183 7.317 21.61
Almeida et al. 2023 123.53 -36.262 – – – –
Qin et al. 2023 123.42 -36.18 2.26 -7.14 7.18 23.97
He et al. 2022 123.854 -35.608 2.229 -7.129 7.132 –
Dias et al. 2021 123.507 -36.242 2.239 -7.11 7.341 24.745
Cantat-Gaudin et al. 2020 123.449 -36.329 2.257 -7.101 7.35 –
Cantat-Gaudin & Anders 2020 123.449 -36.329 2.257 -7.101 7.35 –
Soubiran et al. 2018 123.449 -36.329 – – – 22.83
Cantat-Gaudin et al. 2018 123.449 -36.329 2.257 -7.101 7.35 –
Loktin & Popova 2017 123.6 -36.382 – -5.105 4.613 17.4
Dias et al. 2014 123.6 -36.383 – -3.8 -0.76 –
Gozha et al. 2012 123.6 -36.383 – – – –
Piskunov et al. 2008 123.516 -36.355 – – – –
Kharchenko et al. 2007 123.6 -36.38 – 0.32 – 17.4
van den Bergh 2006 123.6 -36.4 – – – –
Kharchenko et al. 2005 123.52 -36.36 – -7.47 7.12 17.4
Kharchenko et al. 2003 123.49 -36.34 – -7.65 6.8 –
Dias et al. 2002 123.6 -36.383 – -7.4 5.1 18.0

💡 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
Li et al. 2025 0.41 0.17 – 21 -0.027 – – –
Almeida et al. 2025 0.44 0.23 – 25 – 98 – –
Alfonso et al. 2024 0.46 0.00 – 23 -0.054 – – –
Hunt & Reffert 2024 – – – – – 92* – –
Celli et al. 2024 – – – 29 – 79 – –
Cavallo et al. 2024 0.44 0.60 – 8 -0.250 – – –
Hunt & Reffert 2023 0.42 0.11 0.52 9 – – – –
Almeida et al. 2023 0.43 0.14 – 28 -0.013 181* 0.54 –
Qin et al. 2023 0.49 0.22 – 18 – – – –
He et al. 2022 – 0.10 – 18 – – – –
Dias et al. 2021 0.44 0.23 – 25 -0.054 – – –
Cantat-Gaudin et al. 2020 0.46 0.00 – 29 – – – –
Cantat-Gaudin & Anders 2020 0.44 – – – – – – –
Soubiran et al. 2018 0.44 – – – – – – –
Cantat-Gaudin et al. 2018 0.44 – – – – – – –
Loktin & Popova 2017 0.59 0.23 – 410 – – – –
Gozha et al. 2012 0.44 – – 251 – 55 – –
Piskunov et al. 2008 0.44 0.16 – 14 – – – –
van den Bergh 2006 0.44 0.19 – 13 – – – –
Kharchenko et al. 2005 0.44 0.16 – 14 – – – –
Kharchenko et al. 2003 0.41 0.03 – – – – – –
Dias et al. 2002 0.48 0.19 – 251 – – – –

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

Visualization
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VDBH 23 UCC
VDBH 23 HUNT23
VDBH 23 CANTAT20
Galactocentric position diagram