OC 0571

0.21 UTI

0.0

C_N

0.19

C_dens

0.38

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 22

Stellar density (N₅₀/rad) 0.9 [N/pc²]

C3 classification BC

C_N 0.0 Sparse
C_dens 0.19 Very loose
C_C3 0.38 Low 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 0571 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the metallicity 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 Young

Palma et al. (2025)
Classified as optical pair P560, along with UBC_1625.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for OC 0571 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–	177.241	-61.329	0.496	-6.414	0.526	–
Hunt & Reffert	2024	177.112	-61.339	0.483	-6.401	0.555	-52.49
Cavallo et al.	2024	177.398	-61.382	0.484	–	–	–
Hunt & Reffert	2023	177.112	-61.339	0.483	-6.401	0.555	-52.49
Hao et al.	2022	177.315	-61.22	0.524	-6.408	0.502	–

💡 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–	1.815	0.79	0.85	79	0.266	194	–	–
Hunt & Reffert	2024	–	–	–	–	–	194⁽¹⁾	–	–
Cavallo et al.	2024	1.71	0.79	–	81	-0.080	–	–	–
Hunt & Reffert	2023	1.92	0.76	0.85	60	–	–	–	–
Hao et al.	2022	–	1.32	–	79	0.611	–	–	–

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

Visualization

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