OC 0401

0.51 UTI

0.36

C_N

0.92

C_dens

0.75

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 36

Stellar density (N₅₀/rad) 4.6 [N/pc²]

C3 classification AB

C_N 0.36 Poorly populated
C_dens 0.92 Very dense
C_C3 0.75 High quality
C_lit 0.25 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 0401 is a poorly populated, very dense 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, very young cluster, but with a large variance across recent sources for the absorption and metallicity parameters (see Parameters). It is poorly studied in the literature.

Note: This object shares a significant percentage of members with at least one entry reported in the same catalogue. See table with shared members information.

Close Low extinction Near-solar metallicity Very young

Liu et al. (2025)
Classified as primordial binary cluster 310 along with OC_0395.

Palma et al. (2025)
Classified as genetic pair P242, along with OC_0395.

Cavallo et al. (2024)
Gold sample.

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

Data

🔍 Search references for OC 0401 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–	104.85	-23.332	1.176	-3.121	3.387	37.181
Cavallo et al.	2024	104.927	-23.547	1.181	–	–	–
Hunt & Reffert	2023	104.686	-23.326	1.185	-3.069	3.395	35.587
Hao et al.	2022	104.713	-23.363	1.143	-2.989	3.346	–

💡 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–	0.81	0.335	0.53	12	0.141	–	–	–
Liu et al.	2025	0.77	0.02	–	28	–	–	–	–
Cavallo et al.	2024	0.92	0.52	–	6	-0.330	–	–	–
Hunt & Reffert	2023	0.81	0.15	0.53	14	–	–	–	–
Hao et al.	2022	–	1.92	–	10	0.611	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0399	58.3	104.93	-23.26	1.17	-3.12	3.36	37.18	0.31

💡 Note: The % column shows the percentage of members that OC 0401 shares with each listed object.

Visualization

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