OC 0606

0.23 UTI

0.0

C_N

0.6

C_dens

0.38

C_C3

0.1

C_lit

1.0

C_dup

N_m (P>50%) 20

Core radius and density 0.9 [pc], 3.0 [pc^-2]

C3 classification CB

C_N 0.0 Sparse
C_dens 0.6 Moderately dense
C_C3 0.38 Low 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 0606 is a sparse, moderately dense object of low C3 quality. Its parallax locates it at a relatively close distance, near 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 absorption and age parameters (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 Moderate extinction Near-solar metallicity Intermediate age

Liu et al. (2025)
Classified as primordial binary cluster 312 along with Theia_339.

Palma et al. (2025)
Classified as optical pair (not dynamically associated) P243, along with Theia_339.

Cavallo et al. (2024)
Silver 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 0606 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–	212.866	-63.149	0.519	-5.148	-2.882	–
Hunt & Reffert	2024	212.897	-63.141	0.508	-5.141	-2.888	–
Cavallo et al.	2024	212.906	-63.139	0.507	–	–	–
Hunt & Reffert	2023	212.897	-63.141	0.508	-5.141	-2.888	–
Hao et al.	2022	212.897	-63.146	0.535	-5.181	-2.83	–

💡 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–	1.935	1.39	0.64	118	-0.089	227	–	–
Liu et al.	2025	3.08	0.47	–	76	–	–	–	–
Hunt & Reffert	2024	1.79	1.39	0.64	118	–	227⁽¹⁾	–	–
Cavallo et al.	2024	2.08	0.73	–	617	-0.200	–	–	–
Hunt & Reffert	2023	1.79	1.39	0.64	118	–	–	–	–
Hao et al.	2022	–	2.05	–	79	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 247	100.0	212.92	-63.13	0.52	-5.14	-2.89	–	0.17

💡 Note: The % column shows the percentage of members that OC 0606 shares with each listed object.

Visualization

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