OC 0165

0.17 UTI

0.0

C_N

0.24

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 21

Core radius and density 1.1 [pc], 1.2 [pc^-2]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.24 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

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OC 0165 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near 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 0165 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–	333.01	53.9	0.908	-1.769	-2.384	-25.59
Hunt & Reffert	2024	332.997	53.928	0.915	-1.789	-2.34	-24.842
Cavallo et al.	2024	333.013	53.908	0.915	–	–	–
Hunt & Reffert	2023	332.997	53.928	0.915	-1.789	-2.34	-24.842
Hao et al.	2022	332.998	53.919	0.904	-1.776	-2.428	–

💡 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–	1.05	0.81	0.51	283	0.305	736	–	–
Hunt & Reffert	2024	1.05	0.69	0.51	283	–	736⁽¹⁾	–	–
Cavallo et al.	2024	1.14	0.93	–	200	0.360	–	–	–
Hunt & Reffert	2023	1.05	0.69	0.51	283	–	–	–	–
Hao et al.	2022	–	4.28	–	316	0.250	–	–	–

(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 14131	100.0	333.06	53.92	0.92	-1.78	-2.35	-25.59	0.0
FoF 2295	100.0	333.05	53.92	0.91	-1.78	-2.35	-25.14	0.39

💡 Note: The % column shows the percentage of members that OC 0165 shares with each listed object.

Visualization

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