HSC 1999

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UTI:
UCC Trust Index

C_N C_dens C_C3 C_lit C_dup
0.52 1.0 0.75 0.33 1.0
C3
N_50
r_50
AB 55 2.6
Summary

HSC 1999 is a moderately populated, very dense object of high C3 quality. It is located at a moderate distance from the Sun, below the mid-plane. It was recently reported in the literature.

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

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Positions

Reference RA DEC Plx pmRA pmDE Rv
Hunt & Reffert (2023) 116.755 -33.198 0.25 -3.196 3.048 53.897
Cavallo et al. (2024) 116.782 -33.216 0.252 – – –
Hunt & Reffert (2024) 116.755 -33.198 0.25 -3.196 3.048 53.897
Hu & Soubiran (2025) 116.782 -33.216 – – – –
           
UCC 116.762 -33.207 0.253 -3.23 3.044 56.396
Galactocentric position Galactocentric position diagram

How are the galactocentric plots generated?

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Estimated members

HSC 1999 UCC
HSC 1999 HUNT23

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Fundamental parameters

Reference Values
Hunt & Reffert (2023) AV50=4.944, diffAV50=1.962, MOD50=12.611, logAge50=8.595
Cavallo et al. (2024) AV50=4.55, dMod50=12.79, logAge50=8.93, [Fe/H]50=-0.36
Hunt & Reffert (2024) MassJ=891.791, MassTot=913.601
Hu & Soubiran (2025) MA22=-0.29, MA23f=-0.41, MA23g=-0.32, MK24=-0.29, MF24=-0.1

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Cluster region map

Objects with shared members

Cluster % RA DEC Plx pmRA pmDE Rv UTI
CWNU 2978 100.0 116.76 -33.21 0.26 -3.22 3.05 56.69 0.16