OC 0381

0.45 UTI

0.26

C_N

1.0

C_dens

0.38

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 26

Stellar density (N₅₀/rad) 11.8 [N/pc²]

C3 classification CB

C_N 0.26 Poorly populated
C_dens 1.0 Very dense
C_C3 0.38 Low quality
C_lit 0.3 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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OC 0381 is a poorly populated, very dense object of low C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is poorly studied in the literature.

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Palma et al. (2025)
Classified as optical pair P390, along with Gulliver_13.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for OC 0381 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–	105.174	-14.392	0.628	-1.411	1.635	21.55
Hu & Soubiran	2025	105.195	-14.401	–	–	–	–
Hunt & Reffert	2024	105.166	-14.397	0.629	-1.424	1.641	25.259
Cavallo et al.	2024	105.195	-14.401	0.632	–	–	–
Hunt & Reffert	2023	105.166	-14.397	0.629	-1.424	1.641	25.259
Hao et al.	2022	105.156	-14.392	0.631	-1.429	1.628	–

💡 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–	1.535	1.03	1.33	631	0.112	173	–	–
Hu & Soubiran	2025	–	–	–	–	-0.170⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	173⁽¹⁾	–	–
Cavallo et al.	2024	1.55	1.03	–	794	0.360	–	–	–
Hunt & Reffert	2023	1.52	1.10	1.33	358	–	–	–	–
Hao et al.	2022	–	0.62	–	631	0.112	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 190	92.3	105.17	-14.38	0.62	-1.4	1.64	21.55	0.01

💡 Note: The % column shows the percentage of members that OC 0381 shares with each listed object.

Visualization

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