UBC 279

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0.65 UTI
0.76
CN
1.0
Cdens
0.75
CC3
0.38
Clit
1.0
Cdup
Radius (P>50% members) 9.7 [arcmin]
  • CN 0.76 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.38 Poorly studied
  • Cdup 1.0 Unique

Overview

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UBC 279 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is poorly 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 Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

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Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 173.515 -66.098 0.629 -7.285 2.068 -13.091
Li et al. 2025 173.443 -66.087 0.621 -7.296 2.034 –
Hunt & Reffert 2024 173.484 -66.111 0.631 -7.301 2.083 -13.146
Cavallo et al. 2024 173.367 -66.087 0.633 – – –
Hunt & Reffert 2023 173.484 -66.111 0.631 -7.301 2.083 -13.146
Cantat-Gaudin et al. 2020 173.443 -66.087 0.621 -7.296 2.034 –
Castro-Ginard et al. 2020 173.437 -66.089 0.62 -7.283 2.041 –

💡 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 1.38 0.78 – 426 -0.052 – – –
Hunt & Reffert 2024 – – – – – 731* – –
Cavallo et al. 2024 1.51 0.82 – 479 0.340 – – –
Hunt & Reffert 2023 1.51 0.77 1.02 248 – – – –
Cantat-Gaudin et al. 2020 1.61 0.77 – 295 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
CWWDL 13313 67.5 173.44 -66.09 0.63 -7.29 2.09 -14.56 0.01
OC 0570 6.1 172.55 -66.08 0.63 -7.22 2.21 -12.67 0.14

💡 Note: The % column shows the percentage of members that UBC 279 shares with each listed object.

Visualization

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