UPK 549

N_50

r_50

222

9.7

Summary

UPK 549 is a rich, very dense object of high C3 quality. It is located at a relatively close distance from the Sun, near the mid-plane. It is moderately 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)	146.503	-52.497	–	-1.69	-0.43	–
Cantat-Gaudin et al. (2020)	146.49	-52.49	0.96	-1.676	-0.439	–
Dias et al. (2021)	146.496	-52.483	0.964	-1.663	-0.447	-4.075
Tarricq et al. (2022)	146.5	-52.49	0.981	-1.663	-0.408	–
He et al. (2022)	146.482	-52.481	0.978	-1.661	-0.409	–
Hunt & Reffert (2023)	146.483	-52.482	0.973	-1.649	-0.42	-5.823
Cavallo et al. (2024)	146.483	-52.477	0.972	–	–	–
Hunt & Reffert (2024)	146.483	-52.482	0.973	-1.649	-0.42	-5.823
Almeida et al. (2025)	146.496	-52.483	–	–	–	–
Hu & Soubiran (2025)	146.483	-52.477	–	–	–	–

UCC	146.464	-52.49	0.978	-1.65	-0.413	-4.495

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=1010, log(age)=9.05`
Cantat-Gaudin et al. (2020)	`AVNN=0.8, DistPc=1014.0, AgeNN=8.97`
Dias et al. (2021)	`Av=1.363, Dist=996, logage=8.989, [Fe/H]=0.123`
Tarricq et al. (2022)	`Dist=991, logAgeNN=8.99`
He et al. (2022)	`A0=1.5, logAge=8.9`
Hunt & Reffert (2023)	`AV50=1.425, diffAV50=1.648, MOD50=9.968, logAge50=8.566`
Cavallo et al. (2024)	`AV50=1.42, dMod50=9.97, logAge50=8.89, [Fe/H]50=0.17`
Hunt & Reffert (2024)	`MassJ=778.205, MassTot=814.802`
Almeida et al. (2025)	`AV=1.363, Dist=996, logAge=8.989, MassRk=488.0`
Hu & Soubiran (2025)	`MA22=-0.01, MA23f=-0.15, MA23g=-0.1, MZ23=-0.07, MK24=-0.13, MF24=-0.16`

Search coordinates in Bayestar19

Cluster region map

Objects with shared members

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 256	99.1	146.46	-52.49	0.98	-1.65	-0.41	-4.5	0.02
FoF 2236	90.1	146.46	-52.49	0.98	-1.65	-0.41	-4.43	0.0