Theia 101

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C3
N_50
r_50
CB 21 46.5
Summary

Theia 101 is a sparse, very loose object of low C3 quality. It is located at a very close distance from the Sun, near the mid-plane. It was recently reported in the literature.

Warning: contains less than 25 stars with P>0.5 estimated.

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

Search object in SciX | Simbad

Positions

Reference RA DEC Plx pmRA pmDE Rv
Hunt & Reffert (2023) 323.573 53.072 2.075 3.158 -0.497 -25.22
Cavallo et al. (2024) 323.455 53.155 2.081
Hu & Soubiran (2025) 323.455 53.155
           
UCC 323.246 53.072 2.113 3.189 -0.419 -26.068
Galactocentric position Galactocentric position diagram

How are the galactocentric plots generated?

Search coordinates in CDS | Simbad

Estimated members

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Fundamental parameters

Reference Values
Hunt & Reffert (2023) AV50=0.74, diffAV50=0.98, MOD50=8.258, logAge50=8.129
Cavallo et al. (2024) AV50=0.73, dMod50=8.42, logAge50=8.79, [Fe/H]50=0.39
Hu & Soubiran (2025) MA22=-0.15, MA23f=-0.02, MZ23=0.04, MK24=-0.01, MF24=-0.03

Search coordinates in Bayestar19

Cluster region map