OC 0258

0.13 UTI

0.0

C_N

0.19

C_dens

0.5

C_C3

0.0

C_lit

0.96

C_dup

C3 classification BB

Number of members (P>50%) 21

Radius (P>50% members) 6.9 [arcmin]

C_N 0.0 Sparse
C_dens 0.19 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.0 Rarely studied
C_dup 0.96 Unique

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

Overview

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OC 0258 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a metal-rich, young cluster (see Parameters). It is rarely studied in the literature.

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

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.96) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Moderate extinction Metal-rich Young

Data

🔍 Search references for OC 0258 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	–	44.722	57.686	0.421	0.6	-1.257	17.282
Hao et al.	2022	44.694	57.67	0.423	0.582	-1.255	–

💡 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	–	2.47	–	32	0.611	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0259	4.0	45.08	57.47	0.42	0.69	-1.31	-93.05	0.2
SAI 25	4.0	44.98	57.41	0.39	0.62	-1.28	-33.84	0.48

💡 Note: The % column shows the percentage of members that OC 0258 shares with each listed object.

Visualization

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