OC 0660

0.14 UTI

0.0

C_N

0.11

C_dens

0.75

C_C3

0.0

C_lit

0.8

C_dup

C3 classification AB

Number of members (P>50%) 16

Radius (P>50% members) 12.7 [arcmin]

C_N 0.0 Sparse
C_dens 0.11 Very loose
C_C3 0.75 High quality
C_lit 0.0 Rarely studied
C_dup 0.8 Very likely unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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OC 0660 is a sparse, very loose object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a metal-rich, very young cluster (see Parameters). It is rarely studied in the literature.

Note: This is very likely a unique object, which shares a small percentage of members with at least one previously reported entry. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.8) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Moderate extinction Metal-rich Very young

Data

🔍 Search references for OC 0660 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	–	248.98	-50.304	0.675	-0.757	-2.892	-24.397
Hao et al.	2022	249.248	-50.311	0.681	-0.748	-2.873	–

💡 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]	Bfr	BSS
Hao et al.	2022	–	1.78	–	4	0.611	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Collinder 305	20.0	248.67	-49.76	0.68	-0.68	-2.83	-19.48	1.0

💡 Note: The % column shows the percentage of members that OC 0660 shares with each listed object.

Visualization

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