UPK 436

0.46 UTI

0.74

C_N

0.14

C_dens

0.75

C_C3

0.32

C_lit

1.0

C_dup

N_m (P>50%) 99

Core radius and density 3.6 [pc], 0.7 [pc^-2]

C3 classification AB

C_N 0.74 Moderately populated
C_dens 0.14 Very loose
C_C3 0.75 High quality
C_lit 0.32 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UPK 436 is a moderately populated, very loose object of high C3 quality. Its parallax locates it at a close distance, below 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 age and metallicity parameters (see Parameters). It is poorly studied in the literature.

Close Low extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for UPK 436 in: SciX Simbad

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Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	100.211	-8.091	1.18	-4.093	0.636	23.968
Li et al.	2025	100.18	-8.126	1.157	-4.119	0.635	–
Almeida et al.	2025	100.18	-8.166	–	–	–	–
Alfonso et al.	2024	100.28	-8.156	1.151	-4.098	0.654	–
Hunt & Reffert	2024	100.328	-7.998	1.183	-4.131	0.649	18.709
Celli et al.	2024	100.18	-8.126	–	–	–	–
Cavallo et al.	2024	100.113	-8.126	1.186	–	–	–
Hunt & Reffert	2023	100.328	-7.998	1.183	-4.131	0.649	18.709
Almeida et al.	2023	100.179	-8.178	–	–	–	–
Dias et al.	2021	100.18	-8.166	1.168	-4.159	0.645	24.886
Cantat-Gaudin et al.	2020	100.18	-8.126	1.157	-4.119	0.635	–
Cantat-Gaudin & Anders	2020	100.2	-8.097	1.167	-4.17	0.607	–
Sim et al.	2019	100.231	-8.128	–	-4.1	0.66	–

💡 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–	0.82	0.38	0.84	26	-0.003	286	0.69	–
Li et al.	2025	0.72	0.38	–	27	-0.259	–	–	–
Almeida et al.	2025	0.82	0.48	–	62	–	244	–	–
Alfonso et al.	2024	0.85	0.23	–	20	0.049	–	–	–
Hunt & Reffert	2024	0.80	0.21	0.84	15	–	117⁽¹⁾	–	–
Celli et al.	2024	–	–	–	26	–	337	–	–
Cavallo et al.	2024	0.87	0.48	–	9	-0.020	–	–	–
Hunt & Reffert	2023	0.80	0.21	0.84	15	–	–	–	–
Almeida et al.	2023	0.81	0.47	–	53	-0.003	328⁽¹⁾	0.69	–
Dias et al.	2021	0.82	0.48	–	62	0.049	–	–	–
Cantat-Gaudin et al.	2020	0.85	0.23	–	26	–	–	–	–
Cantat-Gaudin & Anders	2020	0.84	–	–	–	–	–	–	–
Sim et al.	2019	0.84	–	–	20	–	–	–	–

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

Visualization

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