UPK 385

(OCSN 307)

0.81 UTI

0.55

C_N

1.0

C_dens

1.0

C_C3

0.75

C_lit

1.0

C_dup

N₅₀ (P>50% members) 59

Stellar density (N₅₀/rad) 15.3 [N/pc²]

C3 classification AA

C_N 0.55 Moderately populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.75 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UPK 385 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low extinction. It is catalogued as a low-mass, near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption and metallicity parameters (see Parameters). It is well-studied in the literature.

Very close Low extinction Low mass Near-solar metallicity Very young

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

Cavallo et al. (2024)
Silver sample.

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

Data

🔍 Search references for UPK 385 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–	75.647	12.983	3.159	1.829	-3.478	14.722
Almeida et al.	2025	75.727	13.06	–	–	–	–
Alfonso et al.	2024	75.65	13.031	3.102	1.842	-3.431	–
Zhang et al.	2024	75.701	12.948	–	–	–	–
Celli et al.	2024	75.647	13.02	–	–	–	–
Cavallo et al.	2024	75.793	12.997	3.163	–	–	–
Hunt & Reffert	2023	75.701	12.948	3.16	1.75	-3.461	15.858
Almeida et al.	2023	75.675	13.082	–	–	–	–
Qin et al.	2023	75.7	12.99	3.21	1.78	-3.59	15.2
He et al.	2022	75.712	13.045	3.172	1.835	-3.477	–
Dias et al.	2021	75.727	13.06	3.141	1.824	-3.5	24.24
Cantat-Gaudin et al.	2020	75.647	13.02	3.133	1.809	-3.484	–
Cantat-Gaudin & Anders	2020	75.647	13.02	3.133	1.96	-3.535	–
Sim et al.	2019	75.739	12.968	–	1.87	-3.52	–

💡 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–	0.32	0.72	1.12	12	-0.077	35	0.53	–
Almeida et al.	2025	0.32	0.72	–	12	–	35	–	–
Alfonso et al.	2024	0.32	0.87	–	12	-0.116	–	–	–
Zhang et al.	2024	–	–	–	–	-0.077⁽¹⁾	–	–	–
Celli et al.	2024	–	–	–	12	–	20	–	–
Cavallo et al.	2024	0.32	1.37	–	13	0.380	–	–	–
Hunt & Reffert	2023	0.30	0.57	1.12	10	–	–	–	–
Almeida et al.	2023	0.31	0.68	–	27	0.192	61⁽¹⁾	0.53	–
Qin et al.	2023	0.34	0.40	–	14	–	–	–	–
He et al.	2022	–	0.25	–	8	–	–	–	–
Dias et al.	2021	0.32	0.72	–	12	-0.116	–	–	–
Cantat-Gaudin et al.	2020	0.32	0.87	–	12	–	–	–	–
Cantat-Gaudin & Anders	2020	0.32	–	–	–	–	–	–	–
Sim et al.	2019	0.32	–	–	10	–	–	–	–

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

Visualization

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