UBC 17 b

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0.71 UTI
0.78
CN
1.0
Cdens
1.0
CC3
0.38
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 179
Radius (P>50% members) 16.8 [arcmin]
  • CN 0.78 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.38 Poorly 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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UBC 17 b is a rich, very dense object of very high C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It is poorly studied in the literature.

Note: This object shares a large percentage of members with 3 later reported entries. See table with shared members information.

Very close Low extinction Near-solar metallicity Very young

Data
🔍 Search references for UBC 17 b 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 – 83.165 -1.709 2.396 0.07 -0.218 25.619
Li et al. 2025 83.195 -1.585 2.376 0.078 -0.163 –
Alfonso et al. 2024 83.2 -1.72 2.36 0.045 -0.209 –
Celli et al. 2024 83.195 -1.585 – – – –
Cantat-Gaudin et al. 2020 83.195 -1.585 2.376 0.078 -0.163 –
Cantat-Gaudin & Anders 2020 83.195 -1.585 2.376 0.078 -0.163 –
Castro-Ginard et al. 2018 83.355 -1.548 2.363 0.055 -0.167 33.19

💡 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 0.39 0.28 – 12 -0.033 – – –
Alfonso et al. 2024 0.39 0.05 – 10 -0.035 – – –
Celli et al. 2024 – – – 12 – 174 – –
Cantat-Gaudin et al. 2020 0.41 0.05 – 11 – – – –
Cantat-Gaudin & Anders 2020 0.42 – – – – – – –
Cluster % RA DEC Plx pmRA pmDE Rv UTI
Gulliver 6 100.0 83.34 -1.63 2.41 -0.07 -0.24 28.06 0.68
OCSN 194 100.0 83.32 -1.64 2.42 -0.06 -0.25 28.06 0.02
Theia 13 54.7 83.14 -1.76 2.4 0.08 -0.22 25.77 0.0

💡 Note: The % column shows the percentage of members that UBC 17 b shares with each listed object.

Visualization
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UBC 17 b UCC
UBC 17 b CANTAT20
Galactocentric position diagram