UPK 27

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UTI:
UCC Trust Index

C_N C_dens C_C3 C_lit C_dup
0.72 1.0 1.0 0.82 1.0
C3
N_50
r_50
AA 94 10.3
Summary

UPK 27 is a moderately populated, very dense object of very high C3 quality. It is located at a close distance from the Sun, above the mid-plane. It is well-studied in the literature.

This object shares a large percentage of members with a later reported entry.

Search object in SciX | Simbad

Positions

Reference RA DEC Plx pmRA pmDE Rv
Sim et al. (2019) 275.075 -5.147 – 2.36 -2.14 –
Cantat-Gaudin et al. (2020) 275.051 -5.167 1.088 2.381 -2.116 –
Dias et al. (2021) 275.062 -5.171 1.077 2.399 -2.124 -31.303
Tarricq et al. (2022) 275.063 -5.167 1.083 2.357 -2.191 –
He et al. (2022) 275.057 -5.127 1.09 2.352 -2.182 –
Hunt & Reffert (2023) 275.06 -5.146 1.081 2.379 -2.199 -29.822
Cavallo et al. (2024) 275.034 -5.194 1.08 – – –
Hunt & Reffert (2024) 275.06 -5.146 1.081 2.379 -2.199 -29.822
Alfonso et al. (2024) 275.049 -5.167 1.049 2.355 -2.208 –
Almeida et al. (2025) 275.062 -5.171 – – – –
Hu & Soubiran (2025) 275.034 -5.194 – – – –
           
UCC 275.045 -5.168 1.087 2.361 -2.202 -29.483
Galactocentric position Galactocentric position diagram

How are the galactocentric plots generated?

Search coordinates in CDS | Simbad

Estimated members

UPK 27 UCC
UPK 27 HUNT23
UPK 27 CANTAT20

Explore data in Colab

Fundamental parameters

Reference Values
Sim et al. (2019) d_pc=899, log(age)=9.35
Cantat-Gaudin et al. (2020) AVNN=2.27, DistPc=924.0, AgeNN=9.21
Dias et al. (2021) Av=3.522, Dist=910, logage=8.842, [Fe/H]=0.026
Tarricq et al. (2022) Dist=899, logAgeNN=9.22
He et al. (2022) A0=4.6, logAge=8.6
Hunt & Reffert (2023) AV50=4.086, diffAV50=2.657, MOD50=9.682, logAge50=8.846
Cavallo et al. (2024) AV50=4.08, dMod50=10.08, logAge50=8.83, [Fe/H]50=0.37
Hunt & Reffert (2024) MassJ=334.546, MassTot=335.421
Alfonso et al. (2024) AV=2.26989, MOD=9.82995, logAge=9.04120, Z=0.02597
Almeida et al. (2025) AV=3.522, Dist=910, logAge=8.842, MassRk=332.2
Hu & Soubiran (2025) MA22=0.25, MA23f=-0.13, MA23g=0.1, MK24=-0.07, MF24=-0.04

Search coordinates in Bayestar19

Cluster region map

Objects with shared members

Cluster % RA DEC Plx pmRA pmDE Rv UTI
UBC 348 100.0 275.04 -5.17 1.09 2.36 -2.2 -29.48 0.01