OC 0390

0.23 UTI

0.0

C_N

0.14

C_dens

0.5

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 22

Stellar density (N₅₀/rad) 0.7 [N/pc²]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.14 Very loose
C_C3 0.5 Intermediate 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 0390 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a relatively 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 age parameter (see Parameters). It is poorly studied in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for OC 0390 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–	112.783	-13.668	0.533	-1.186	0.242	26.972
Hunt & Reffert	2024	112.771	-13.626	0.548	-1.157	0.221	26.97
Cavallo et al.	2024	112.773	-13.645	0.538	–	–	–
Hunt & Reffert	2023	112.771	-13.626	0.548	-1.157	0.221	26.97
Hao et al.	2022	112.773	-13.664	0.534	-1.273	0.272	–

💡 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–	1.75	0.87	0.61	185	-0.044	106	–	–
Hunt & Reffert	2024	–	–	–	–	–	106⁽¹⁾	–	–
Cavallo et al.	2024	1.76	0.87	–	89	-0.140	–	–	–
Hunt & Reffert	2023	1.74	0.70	0.61	185	–	–	–	–
Hao et al.	2022	–	1.01	–	316	0.051	–	–	–

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

Visualization

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