OC 0442

0.24 UTI

0.26

C_N

0.31

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 26

Core radius and density 1.3 [pc], 1.6 [pc^-2]

C3 classification BB

C_N 0.26 Poorly populated
C_dens 0.31 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 0442 is a poorly populated, loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, above 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 parameter (see Parameters). It is rarely studied in the literature.

Note: This object shares a large percentage of members with 2 later reported entries. 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 0442 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–	126.038	-32.555	0.592	-4.283	3.258	-8.43
Hunt & Reffert	2024	126.049	-32.579	0.585	-4.28	3.267	6.313
Cavallo et al.	2024	126.057	-32.553	0.586	–	–	–
Hunt & Reffert	2023	126.049	-32.579	0.585	-4.28	3.267	6.313
Hao et al.	2022	126.05	-32.585	0.589	-4.303	3.262	–

💡 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–	1.62	0.315	0.53	169	0.081	150	–	–
Hunt & Reffert	2024	1.62	0.18	0.53	169	–	150⁽¹⁾	–	–
Cavallo et al.	2024	1.58	0.45	–	269	0.000	–	–	–
Hunt & Reffert	2023	1.62	0.18	0.53	169	–	–	–	–
Hao et al.	2022	–	2.31	–	100	0.161	–	–	–

(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 13964	100.0	126.04	-32.55	0.58	-4.27	3.28	25.08	0.15
CWNU 228	88.5	126.05	-32.55	0.58	-4.28	3.26	-8.43	0.05

💡 Note: The % column shows the percentage of members that OC 0442 shares with each listed object.

Visualization

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