UPK 45

N_50

r_50

11.5

Summary

UPK 45 is a moderately populated, very dense object of 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 large percentage of members with 2 later reported entries.

Search object in SciX | Simbad

Positions

Reference	RA	DEC	Plx	pmRA	pmDE	Rv
Sim et al. (2019)	291.569	-0.098	–	-0.62	-2.16	–
Cantat-Gaudin et al. (2020)	291.696	0.212	1.109	-0.697	-2.138	–
Dias et al. (2021)	291.688	0.199	1.111	-0.698	-2.088	–
He et al. (2022)	291.692	0.247	1.121	-0.607	-2.121	–
Hunt & Reffert (2023)	291.7	0.226	1.104	-0.579	-2.17	1.286
Cavallo et al. (2024)	291.686	0.03	1.114	–	–	–
Hunt & Reffert (2024)	291.7	0.226	1.104	-0.579	-2.17	1.286
Alfonso et al. (2024)	291.679	0.036	1.074	-0.608	-2.162	–
Almeida et al. (2025)	291.688	0.199	–	–	–	–

UCC	291.708	0.2	1.128	-0.618	-2.158	4.108

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=862, log(age)=7.9`
Cantat-Gaudin et al. (2020)	`AVNN=0.83, DistPc=897.0, AgeNN=8.02`
Dias et al. (2021)	`Av=1.259, Dist=852, logage=7.98, [Fe/H]=-0.03`
Tarricq et al. (2022)	`Dist=875, logAgeNN=8.05`
He et al. (2022)	`A0=1.35, logAge=7.55`
Hunt & Reffert (2023)	`AV50=0.755, diffAV50=0.572, MOD50=9.637, logAge50=7.943`
Cavallo et al. (2024)	`AV50=1.17, dMod50=9.64, logAge50=7.89, [Fe/H]50=-0.12`
Hunt & Reffert (2024)	`MassJ=168.030, MassTot=280.936`
Alfonso et al. (2024)	`AV=0.82994, MOD=9.75964, logAge=7.66950, Z=-0.0297`
Almeida et al. (2025)	`AV=1.259, Dist=852, logAge=7.98, MassRk=163.4`

Search coordinates in Bayestar19

Cluster region map

Objects with shared members

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 116	94.8	291.7	0.2	1.12	-0.62	-2.15	4.19	0.02
CWWDL 14314	62.3	291.7	0.22	1.13	-0.65	-2.15	4.58	0.0