Theia 277

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0.22 UTI
0.34
CN
0.28
Cdens
0.5
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members) 10.1 [arcmin]
  • CN 0.34 Poorly populated
  • Cdens 0.28 Loose
  • CC3 0.5 Intermediate quality
  • Clit 0.0 Rarely studied
  • Cdup 1.0 Unique

Overview

Theia 277 is a poorly populated, loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (Cdup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024): Gold sample.

Data

Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 116.282 -23.719 0.6 -3.172 2.801 31.835
Hunt & Reffert 2024 116.25 -23.681 0.592 -3.141 2.811 31.141
Cavallo et al. 2024 116.284 -23.711 0.598
Hunt & Reffert 2023 116.25 -23.681 0.592 -3.141 2.811 31.141

💡 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
Hunt & Reffert 2024 102*
Cavallo et al. 2024 1.59 0.50 83 -0.090
Hunt & Reffert 2023 1.58 0.17 0.40 179

💡 Note: The parameters are sometimes transformed from their original values to match the format of the columns shown here, see FAQ. The columns DAv, Bfr, BSS correspond to differential extinction, binary fraction, and blue stragglers, respectively. BSS values can be listed as fractions or integers.
(*): indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization

Galactocentric position diagram

💡 Note: How are the galactocentric plots generated? See FAQ.