UPK 350

(OCSN 305)

0.69 UTI

0.62

C_N

0.42

C_dens

1.0

C_C3

0.7

C_lit

1.0

C_dup

N₅₀ (P>50% members) 74

Stellar density (N₅₀/rad) 2.1 [N/pc²]

C3 classification AA

C_N 0.62 Moderately populated
C_dens 0.42 Loose
C_C3 1.0 Very high quality
C_lit 0.7 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UPK 350 is a moderately populated, loose object of very high C3 quality. Its parallax locates it at a very close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the absorption and age parameters (see Parameters). It is moderately studied in the literature.

Very close Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

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

Hunt & Reffert (2024)
Classified as a moving group.

Data

🔍 Search references for UPK 350 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–	101.719	48.688	2.301	-4.882	-6.331	1.547
Li et al.	2025	101.689	48.688	2.238	-4.845	-6.346	–
Almeida et al.	2025	101.742	48.684	–	–	–	–
Alfonso et al.	2024	101.635	48.954	2.27	-4.838	-6.322	–
Zhang et al.	2024	101.748	48.332	–	–	–	–
Cavallo et al.	2024	101.84	48.547	2.309	–	–	–
Hunt & Reffert	2023	101.747	48.332	2.318	-4.851	-6.343	2.09
Qin et al.	2023	101.64	48.59	2.29	-4.83	-6.33	1.57
He et al.	2022	101.617	48.828	2.309	-4.846	-6.318	–
Tarricq et al.	2022	101.646	48.722	2.308	-4.894	-6.307	–
Dias et al.	2021	101.742	48.684	2.23	-4.872	-6.375	5.613
Cantat-Gaudin et al.	2020	101.689	48.688	2.238	-4.845	-6.346	–
Cantat-Gaudin & Anders	2020	101.646	48.702	2.258	-4.849	-6.363	–
Sim et al.	2019	101.817	48.812	–	-4.88	-6.39	–

💡 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–	0.46	0.43	0.51	129	-0.056	80	–	–
Li et al.	2025	0.54	0.73	–	59	-0.043	–	–	–
Almeida et al.	2025	0.45	0.43	–	516	–	80	–	–
Alfonso et al.	2024	0.46	0.19	–	53	-0.121	–	–	–
Zhang et al.	2024	–	–	–	–	-0.056⁽¹⁾	–	–	–
Cavallo et al.	2024	0.47	0.51	–	72	0.000	–	–	–
Hunt & Reffert	2023	0.42	0.10	0.51	200	–	–	–	–
Qin et al.	2023	0.53	0.40	–	631	–	–	–	–
He et al.	2022	–	0.45	–	112	–	–	–	–
Tarricq et al.	2022	0.46	–	–	135	–	–	–	–
Dias et al.	2021	0.45	0.43	–	516	-0.121	–	–	–
Cantat-Gaudin et al.	2020	0.46	0.19	–	129	–	–	–	–
Cantat-Gaudin & Anders	2020	0.44	–	–	–	–	–	–	–
Sim et al.	2019	0.44	–	–	100	–	–	–	–

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

Visualization

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