HSC 1991

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UTI:
UCC Trust Index

C_N C_dens C_C3 C_lit C_dup
0.25 0.12 0.25 0.25 1.0
C3
N_50
r_50
DB 25 148.3
Summary

HSC 1991 is a poorly populated, 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: 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.

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Positions

Reference RA DEC Plx pmRA pmDE Rv
Hunt & Reffert (2023) 105.128 -36.586 6.653 -3.163 -6.97 22.071
Cavallo et al. (2024) 106.05 -38.948 6.697 – – –
Hu & Soubiran (2025) 106.05 -38.948 – – – –
           
UCC 106.599 -39.228 6.583 -3.471 -6.797 28.258
Galactocentric position Galactocentric position diagram

How are the galactocentric plots generated?

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Estimated members

HSC 1991 UCC
HSC 1991 HUNT23

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Fundamental parameters

Reference Values
Hunt & Reffert (2023) AV50=0.054, diffAV50=0.369, MOD50=5.825, logAge50=8.127
Cavallo et al. (2024) AV50=0.3, dMod50=5.88, logAge50=9.15, [Fe/H]50=0.25
Hu & Soubiran (2025) MA23f=-0.17, MK24=-0.03, MF24=-0.45

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Cluster region map