UPK 12

N_50

r_50

15.5

Summary

UPK 12 is a moderately populated, very dense object of very high C3 quality. It is located at a close distance from the Sun, below the mid-plane. It is well-studied in the literature.

This object shares a significant 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)	288.821	-22.141	–	0.58	-6.61	–
Cantat-Gaudin et al. (2020)	288.805	-22.143	1.541	0.579	-6.68	–
Dias et al. (2021)	288.827	-22.186	1.54	0.617	-6.672	-40.746
Tarricq et al. (2022)	288.907	-22.153	1.498	0.618	-6.631	–
He et al. (2022)	288.791	-22.165	1.527	0.605	-6.679	–
Hunt & Reffert (2023)	288.873	-22.078	1.5	0.604	-6.694	-0.255
Cavallo et al. (2024)	288.885	-21.801	1.502	–	–	–
Hunt & Reffert (2024)	288.873	-22.078	1.5	0.604	-6.694	-0.255
Alfonso et al. (2024)	288.816	-21.986	1.463	0.615	-6.715	–
Almeida et al. (2025)	288.827	-22.186	–	–	–	–

UCC	288.866	-22.142	1.514	0.613	-6.691	4.335

Galactocentric position

How are the galactocentric plots generated?

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Estimated members

1 2 3

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Fundamental parameters

Reference	Values
Sim et al. (2019)	`d_pc=644, log(age)=7.9`
Cantat-Gaudin et al. (2020)	`AVNN=0.22, DistPc=628.0, AgeNN=8.3`
Dias et al. (2021)	`Av=0.447, Dist=644, logage=8.121, [Fe/H]=0.017`
Tarricq et al. (2022)	`Dist=616, logAgeNN=8.34`
He et al. (2022)	`A0=0.5, logAge=8.15`
Hunt & Reffert (2023)	`AV50=0.247, diffAV50=0.839, MOD50=8.984, logAge50=8.279`
Cavallo et al. (2024)	`AV50=0.36, dMod50=9.1, logAge50=8.34, [Fe/H]50=0.41`
Hunt & Reffert (2024)	`MassJ=94.7367, MassTot=194.210`
Alfonso et al. (2024)	`AV=0.21994, MOD=8.98996, logAge=8.49581, Z=0.01702`
Almeida et al. (2025)	`AV=0.447, Dist=644, logAge=8.121, MassRk=128.0`

Search coordinates in Bayestar19

Cluster region map

Objects with shared members

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 98	67.7	288.85	-22.13	1.52	0.61	-6.68	4.97	0.0