OC 0316

0.16 UTI

0.0

C_N

0.05

C_dens

0.5

C_C3

0.13

C_lit

1.0

C_dup

N_m (P>50%) 23

Core radius and density 3.9 [pc], 0.2 [pc^-2]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.05 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.13 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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OC 0316 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 moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption, age, and metallicity parameters (see Parameters). It is rarely 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 Moderate extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as primordial binary cluster 196 along with HSC_1502, and as primordial binary cluster 306 along with OC_0315, and of multiple system 53 along with OC_0315 and HSC_1502.

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P65, along with OC_0315.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for OC 0316 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–	95.198	22.138	0.543	0.262	-2.365	–
Liu et al.	2025	95.27	22.17	0.54	0.25	-2.35	–
Zhang et al.	2024	95.265	22.171	–	–	–	–
Hunt & Reffert	2024	95.265	22.171	0.542	0.246	-2.349	–
Cavallo et al.	2024	95.135	22.151	0.544	–	–	–
Hunt & Reffert	2023	95.265	22.171	0.542	0.246	-2.349	–
Hao et al.	2022	95.274	22.171	0.536	0.298	-2.304	–

💡 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–	1.795	1.58	0.58	33	-0.040	130	–	–
Liu et al.	2025	3.63	0.59	–	23	–	–	–	–
Zhang et al.	2024	–	–	–	–	-0.278⁽¹⁾	–	–	–
Hunt & Reffert	2024	1.76	1.58	0.58	33	–	130⁽¹⁾	–	–
Cavallo et al.	2024	1.83	1.57	–	19	-0.040	–	–	–
Hunt & Reffert	2023	1.76	1.58	0.58	33	–	–	–	–
Hao et al.	2022	–	2.92	–	100	0.250	–	–	–

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

Visualization

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