OC 0491

0.09 UTI

0.0

C_N

0.08

C_dens

0.38

C_C3

0.0

C_lit

1.0

C_dup

N_m (P>50%) 18

Core radius and density 3.3 [pc], 0.4 [pc^-2]

C3 classification CB

C_N 0.0 Sparse
C_dens 0.08 Very loose
C_C3 0.38 Low 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 0491 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by high 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.

High extinction Near-solar metallicity Intermediate age

Data

🔍 Search references for OC 0491 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–	131.857	-46.724	0.183	-3.344	3.672	–
Hao et al.	2022	131.877	-46.725	0.182	-3.358	3.673	–

💡 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–	–	4.56	–	794	0.119	–	–	–
Hao et al.	2022	–	4.56	–	794	0.119	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Pickard 225	76.0	131.86	-46.72	0.19	-3.29	3.66	51.18	0.11

💡 Note: The % column shows the percentage of members that OC 0491 shares with each listed object.

Visualization

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