OC 0558

0.50 UTI

0.25

C_N

1.0

C_dens

0.62

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 25

Stellar density (N₅₀/rad) 10.9 [N/pc²]

C3 classification CA

C_N 0.25 Poorly populated
C_dens 1.0 Very dense
C_C3 0.62 Intermediate 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 0558 is a poorly populated, very dense object of intermediate C3 quality. Its parallax locates it at a large distance, above 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 poorly studied in the literature.

Distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for OC 0558 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–	167.86	-59.539	0.192	-6.99	2.334	22.31
Hu & Soubiran	2025	167.869	-59.538	–	–	–	–
Hunt & Reffert	2024	167.866	-59.538	0.191	-6.988	2.324	22.869
Cavallo et al.	2024	167.869	-59.538	0.192	–	–	–
Hunt & Reffert	2023	167.866	-59.538	0.191	-6.988	2.324	22.869
Hao et al.	2022	167.861	-59.533	0.191	-7.007	2.311	20.488

💡 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–	4.31	2.33	1.69	575	-0.090	288	–	–
Hu & Soubiran	2025	–	–	–	–	-0.200⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	288⁽¹⁾	–	–
Cavallo et al.	2024	3.98	2.07	–	575	-0.090	–	–	–
Hunt & Reffert	2023	4.64	2.52	1.69	167	–	–	–	–
Hao et al.	2022	–	2.33	–	631	0.611	–	–	–

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

Visualization

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