OC 0203

0.27 UTI

0.35

C_N

0.36

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 35

Core radius and density 1.7 [pc], 1.8 [pc^-2]

C3 classification BB

C_N 0.35 Poorly populated
C_dens 0.36 Loose
C_C3 0.5 Intermediate quality
C_lit 0.06 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 0203 is a poorly populated, loose object of intermediate 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 metallicity parameter (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.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold 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 0203 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–	348.858	59.994	0.696	-1.753	-1.372	-6.563
Hunt & Reffert	2024	348.819	59.987	0.698	-1.757	-1.377	-6.516
Cavallo et al.	2024	348.887	59.995	0.699	–	–	–
Hunt & Reffert	2023	348.819	59.987	0.698	-1.757	-1.377	-6.516
Hao et al.	2022	348.858	59.994	0.689	-1.68	-1.305	–

💡 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–	1.37	1.45	1.47	143	0.392	195	–	–
Hunt & Reffert	2024	1.37	1.45	1.47	143	–	195⁽¹⁾	–	–
Cavallo et al.	2024	1.56	1.19	–	282	0.710	–	–	–
Hunt & Reffert	2023	1.37	1.45	1.47	143	–	–	–	–
Hao et al.	2022	–	1.72	–	126	0.073	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 14172	82.9	348.88	60.0	0.69	-1.75	-1.36	-14.48	0.02

💡 Note: The % column shows the percentage of members that OC 0203 shares with each listed object.

Visualization

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