UPK 5

0.76 UTI

0.67

C_N

1.0

C_dens

0.75

C_C3

0.69

C_lit

1.0

C_dup

N₅₀ (P>50% members) 84

Stellar density (N₅₀/rad) 5.3 [N/pc²]

C3 classification AB

C_N 0.67 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.69 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

ℹ️

UPK 5 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption and metallicity parameters (see Parameters). It is moderately studied in the literature.

Close Low extinction Near-solar metallicity Young

Almeida et al. (2025)
Mass determination: good fit. Isochrone match: good fit.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UPK 5 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	273.246	-18.358	1.771	0.671	-8.437	-6.368
Li et al.	2025	273.304	-18.308	1.786	0.659	-8.387	–
Wei et al.	2025	273.264	-18.358	1.773	0.691	-8.459	–
Almeida et al.	2025	273.323	-18.299	–	–	–	–
Alfonso et al.	2024	273.206	-18.371	1.731	0.679	-8.464	–
Hunt & Reffert	2024	273.21	-18.326	1.764	0.682	-8.447	-3.455
Cavallo et al.	2024	273.173	-18.499	1.764	–	–	–
Hunt & Reffert	2023	273.21	-18.326	1.764	0.682	-8.447	-3.455
Tarricq et al.	2022	273.279	-18.248	1.768	0.684	-8.449	–
Dias et al.	2021	273.323	-18.299	1.773	0.654	-8.374	7.814
Cantat-Gaudin et al.	2020	273.304	-18.308	1.786	0.659	-8.387	–
Cantat-Gaudin & Anders	2020	273.304	-18.308	1.784	0.638	-8.359	–
Sim et al.	2019	273.311	-18.274	–	0.74	-8.38	–

💡 Note: The UCC values are estimated from its identified members.

Reference	Year	Dist [kpc]	Av [mag]	DAv [mag]	Age [Myr]	[Fe/H] [dex]	Mass [Msun]	B_frac	BSS
UCC	99999–	0.55	0.715	0.94	95	0.000	156	0.27	–
Li et al.	2025	0.56	0.70	–	95	-0.048	–	–	–
Wei et al.	2025	0.75	0.95	–	68	0.000	192	0.27	–
Almeida et al.	2025	0.55	0.73	–	95	–	156	–	–
Alfonso et al.	2024	0.59	0.27	–	224	0.025	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	146⁽¹⁾	–	–
Cavallo et al.	2024	0.54	1.33	–	62	-0.280	–	–	–
Hunt & Reffert	2023	0.53	0.63	0.94	83	–	–	–	–
Tarricq et al.	2022	0.58	–	–	200	–	–	–	–
Dias et al.	2021	0.55	0.73	–	95	0.024	–	–	–
Cantat-Gaudin et al.	2020	0.59	0.27	–	195	–	–	–	–
Cantat-Gaudin & Anders	2020	0.55	–	–	–	–	–	–	–
Sim et al.	2019	0.55	–	–	100	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization

ℹ️

1 2 3