OC 0142

0.15 UTI

0.0

C_N

0.14

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 23

Core radius and density 1.5 [pc], 0.7 [pc^-2]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.14 Very 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

ℹ️

OC 0142 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the absorption and metallicity parameters (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.

Relatively close Low 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 0142 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	322.544	45.596	0.629	-3.351	-4.475	-13.514
Hunt & Reffert	2024	322.545	45.533	0.622	-3.317	-4.422	-9.466
Cavallo et al.	2024	322.577	45.58	0.624	–	–	–
Hunt & Reffert	2023	322.545	45.533	0.622	-3.317	-4.422	-9.466
Hao et al.	2022	322.545	45.549	0.615	-3.262	-4.564	-13.631

💡 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–	1.59	0.85	0.75	267	0.369	92	–	–
Hunt & Reffert	2024	1.59	0.85	0.75	267	–	92⁽¹⁾	–	–
Cavallo et al.	2024	1.75	0.78	–	389	0.540	–	–	–
Hunt & Reffert	2023	1.59	0.85	0.75	267	–	–	–	–
Hao et al.	2022	–	3.02	–	158	0.198	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 333	84.0	322.54	45.6	0.63	-3.36	-4.47	-26.96	0.03

💡 Note: The % column shows the percentage of members that OC 0142 shares with each listed object.

Visualization

ℹ️

1 2