OC 0521

0.29 UTI

0.27

C_N

0.41

C_dens

0.25

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 27

Stellar density (N₅₀/rad) 2.1 [N/pc²]

C3 classification DB

C_N 0.27 Poorly populated
C_dens 0.41 Loose
C_C3 0.25 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 0521 is a poorly populated, loose object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is poorly studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Young

Palma et al. (2025)
Classified as optical pair P392, along with Gulliver_27.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for OC 0521 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–	144.925	-54.043	0.354	-5.457	4.522	–
Hunt & Reffert	2024	144.965	-54.042	0.331	-5.429	4.502	–
Cavallo et al.	2024	144.748	-53.994	0.333	–	–	–
Hunt & Reffert	2023	144.965	-54.042	0.331	-5.429	4.502	–
Hao et al.	2022	144.956	-54.072	0.352	-5.539	4.563	–

💡 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–	2.725	2.71	1.97	33	0.406	306	–	–
Hunt & Reffert	2024	–	–	–	–	–	306⁽¹⁾	–	–
Cavallo et al.	2024	2.77	2.79	–	98	0.700	–	–	–
Hunt & Reffert	2023	2.68	2.69	1.97	33	–	–	–	–
Hao et al.	2022	–	2.71	–	10	0.112	–	–	–

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

Visualization

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