VDBH 121

(vdB-Hagen 121; vdBergh-Hagen 121; MWSC 1960; BH 121)

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0.70 UTI
0.9
CN
1.0
Cdens
1.0
CC3
0.79
Clit
0.78
Cdup
C3 classification AA
Number of members (P>50%) 492
Radius (P>50% members) 6.7 [arcmin]
  • CN 0.9 Very rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.79 Well-studied
  • Cdup 0.78 Very likely unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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VDBH 121 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, very young cluster (see Parameters). It is well-studied in the literature.

Note: This is very likely a unique object, which shares a small percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Moderate extinction Massive Near-solar metallicity Very young

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

Data
🔍 Search references for VDBH 121 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 – 174.695 -63.401 0.398 -6.012 0.65 0.021
Almeida et al. 2025 174.663 -63.377 – – – –
Celli et al. 2024 174.661 -63.387 – – – –
Just et al. 2023 174.518 -63.335 – – – –
Dias et al. 2021 174.663 -63.377 0.389 -6.011 0.637 –
Cantat-Gaudin et al. 2020 174.661 -63.387 0.387 -6.0 0.63 –
Cantat-Gaudin & Anders 2020 174.661 -63.387 0.387 -6.0 0.63 –
Cantat-Gaudin et al. 2018 174.661 -63.387 0.387 -6.0 0.63 –
Kharchenko et al. 2016 174.518 -63.335 – – – –
Kharchenko et al. 2013 174.525 -63.338 – -5.86 0.52 -3.8
Piskunov et al. 2008 174.521 -63.329 – – – –
Kharchenko et al. 2007 174.52 -63.33 – 0.25 – -3.76
Piskunov et al. 2007 174.521 -63.329 – – – –
Kharchenko et al. 2005 174.52 -63.33 – -5.12 1.05 -3.76
Kharchenko et al. 2003 174.55 -63.35 – -6.09 0.97 –

💡 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 2.25 1.28 – 7 – 1285 – –
Celli et al. 2024 – – – 3 – 1252 – –
Just et al. 2023 – – – 4 – 1337 – –
Dias et al. 2021 2.25 1.28 – 7 -0.089 – – –
Cantat-Gaudin et al. 2020 2.41 1.11 – 3 – – – –
Cantat-Gaudin & Anders 2020 2.40 – – – – – – –
Cantat-Gaudin et al. 2018 2.40 – – – – – – –
Kharchenko et al. 2016 2.94 1.55 – 4 – – – –
Kharchenko et al. 2013 2.94 1.55 – 4 – – – –
Piskunov et al. 2008 2.73 0.90 – 4 – 7311* – –
Piskunov et al. 2007 2.73 0.90 – 4 – 1476 – –
Kharchenko et al. 2005 2.73 0.90 – 4 – – – –
Kharchenko et al. 2003 1.25 0.78 – – – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
IC 2948 38.6 174.88 -63.46 0.4 -5.95 0.65 -11.68 0.02
IC 2944 21.5 174.56 -63.37 0.39 -6.09 0.66 0.02 0.95
VVV 005 7.5 174.74 -63.47 0.4 -5.95 0.51 -45.44 0.0
CWWDL 864 2.4 174.28 -63.27 0.39 -6.15 0.9 4.55 0.23

💡 Note: The % column shows the percentage of members that VDBH 121 shares with each listed object.

Visualization
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VDBH 121 UCC
VDBH 121 CANTAT20
Galactocentric position diagram