OC 0187

0.22 UTI

0.25

C_N

0.11

C_dens

0.75

C_C3

0.0

C_lit

1.0

C_dup

N_m (P>50%) 25

Core radius and density 1.5 [pc], 0.5 [pc^-2]

C3 classification AB

C_N 0.25 Poorly populated
C_dens 0.11 Very loose
C_C3 0.75 High quality
C_lit 0.0 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 0187 is a poorly populated, 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 near-solar metallicity, intermediate-age cluster (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.

Moderate extinction Near-solar metallicity Intermediate age

Data

🔍 Search references for OC 0187 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–	341.216	57.541	0.64	-3.937	-2.97	-24.995
Hao et al.	2022	341.324	57.564	0.644	-3.849	-2.941	–

💡 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–	–	1.95	–	398	0.198	–	–	–
Hao et al.	2022	–	1.95	–	398	0.198	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 117	100.0	341.24	57.52	0.64	-3.95	-2.97	-24.99	0.04

💡 Note: The % column shows the percentage of members that OC 0187 shares with each listed object.

Visualization

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