Theia 2166

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UTI:
UCC Trust Index

C_N C_dens C_C3 C_lit C_dup
0.28 0.86 0.75 0.33 0.11
C3
N_50
r_50
BA 28 5.0
Summary

Theia 2166 is a poorly populated, dense object of high C3 quality. It is located at a relatively close distance from the Sun, near the mid-plane. It was recently reported in the literature.

Warning: This is likely a duplicate object, which shares a large percentage of members with at least one previously reported entry.

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Positions

Reference RA DEC Plx pmRA pmDE Rv
Hunt & Reffert (2023) 216.985 -61.364 0.57 -4.443 -1.948 -40.28
Cavallo et al. (2024) 217.086 -61.36 0.571 – – –
Hunt & Reffert (2024) 216.985 -61.364 0.57 -4.443 -1.948 -40.28
Hu & Soubiran (2025) 217.086 -61.359 – – – –
           
UCC 217.025 -61.352 0.572 -4.395 -1.923 -39.935
Galactocentric position Galactocentric position diagram

How are the galactocentric plots generated?

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Estimated members

Theia 2166 UCC
Theia 2166 HUNT23

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Fundamental parameters

Reference Values
Hunt & Reffert (2023) AV50=1.585, diffAV50=0.638, MOD50=11.097, logAge50=8.845
Cavallo et al. (2024) AV50=1.72, dMod50=10.81, logAge50=8.95, [Fe/H]50=-0.3
Hunt & Reffert (2024) MassJ=161.437, MassTot=169.996
Hu & Soubiran (2025) MA22=-0.27, MA23f=-0.14, MA23g=-0.08, MZ23=-0.21, MK24=-0.11, MF24=-0.21

Search coordinates in Bayestar19

Cluster region map

Objects with shared members

Cluster % RA DEC Plx pmRA pmDE Rv UTI
CWNU 1448 89.3 217.1 -61.35 0.57 -4.39 -1.92 -39.93 0.32