OC 0330

0.24 UTI

0.3

C_N

0.19

C_dens

0.5

C_C3

0.1

C_lit

1.0

C_dup

N_m (P>50%) 30

Core radius and density 1.8 [pc], 0.9 [pc^-2]

C3 classification BB

C_N 0.3 Poorly populated
C_dens 0.19 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.1 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 0330 is a poorly populated, 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 metallicity parameter (see Parameters). It is rarely studied in the literature.

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

⚠️ 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.

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 0330 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–	98.787	12.664	0.534	0.753	-2.803	2.096
Zhang et al.	2024	98.794	12.647	–	–	–	–
Hunt & Reffert	2024	98.794	12.647	0.538	0.689	-2.658	2.099
Cavallo et al.	2024	98.775	12.703	0.537	–	–	–
Hunt & Reffert	2023	98.794	12.647	0.538	0.689	-2.658	2.099
Hao et al.	2022	98.76	12.648	0.532	0.772	-2.798	–

💡 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–	1.72	0.75	0.35	300	0.022	173	–	–
Zhang et al.	2024	–	–	–	–	-0.126⁽¹⁾	–	–	–
Hunt & Reffert	2024	1.72	0.75	0.35	284	–	173⁽¹⁾	–	–
Cavallo et al.	2024	1.75	0.86	–	417	0.220	–	–	–
Hunt & Reffert	2023	1.72	0.75	0.35	284	–	–	–	–
Hao et al.	2022	–	0.20	–	316	0.022	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 451	83.3	98.79	12.66	0.53	0.76	-2.8	2.1	0.02

💡 Note: The % column shows the percentage of members that OC 0330 shares with each listed object.

Visualization

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