OC 0431

0.00 UTI

0.0

C_N

0.03

C_dens

0.75

C_C3

0.06

C_lit

0.0

C_dup

N_m (P>50%) 20

Core radius and density 5.4 [pc], 0.1 [pc^-2]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.03 Very loose
C_C3 0.75 High quality
C_lit 0.06 Rarely studied
C_dup 0.0 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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OC 0431 is a sparse, very loose object of high C3 quality. Its parallax locates it at a large 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 age and metallicity parameters (see Parameters). It is rarely studied in the literature.

⚠️ Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

Very distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.14 (50th percentile).

Data

🔍 Search references for OC 0431 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–	117.961	-30.618	0.102	-1.398	1.863	94.718
Hu & Soubiran	2025	117.955	-30.626	–	–	–	–
Cavallo et al.	2024	117.955	-30.626	0.104	–	–	–
Hunt & Reffert	2023	117.931	-30.639	0.11	-1.404	1.852	114.099
Hao et al.	2022	117.982	-30.61	0.102	-1.413	1.826	78.78

💡 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–	7.77	2.31	2.39	794	-0.200	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.200⁽⁵⁾	–	–	–
Cavallo et al.	2024	7.76	2.31	–	1230	-0.290	–	–	–
Hunt & Reffert	2023	7.78	3.14	2.39	277	–	–	–	–
Hao et al.	2022	–	1.37	–	794	0.265	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Teutsch 62	100.0	117.95	-30.63	0.11	-1.47	1.86	94.72	0.34

💡 Note: The % column shows the percentage of members that OC 0431 shares with each listed object.

Visualization

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