OC 0034

0.42 UTI

0.25

C_N

0.66

C_dens

1.0

C_C3

0.1

C_lit

1.0

C_dup

N_m (P>50%) 25

Core radius and density 0.9 [pc], 3.3 [pc^-2]

C3 classification AA

C_N 0.25 Poorly populated
C_dens 0.66 Moderately dense
C_C3 1.0 Very high quality
C_lit 0.1 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

ℹ️

OC 0034 is a poorly populated, moderately dense object of very high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young 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 significant percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 110 along with CWNU_1994.

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P9, along with CWNU_1994.

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 0034 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	278.978	-12.8	0.517	0.37	-0.446	–
Hunt & Reffert	2024	278.985	-12.8	0.517	0.377	-0.451	-18.732
Cavallo et al.	2024	278.977	-12.801	0.518	–	–	–
Hunt & Reffert	2023	278.985	-12.8	0.517	0.377	-0.451	-18.732
Hao et al.	2022	278.995	-12.8	0.529	0.333	-0.513	3.648

💡 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–	1.84	1.94	0.93	75	0.388	298	–	–
Liu et al.	2025	3.60	0.65	–	83	–	–	–	–
Hunt & Reffert	2024	1.84	1.94	0.93	75	–	298⁽¹⁾	–	–
Cavallo et al.	2024	1.79	1.39	–	151	0.510	–	–	–
Hunt & Reffert	2023	1.84	1.94	0.93	75	–	–	–	–
Hao et al.	2022	–	2.51	–	40	0.265	–	–	–

(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 13352	72.0	278.97	-12.8	0.52	0.33	-0.48	-18.73	0.08

💡 Note: The % column shows the percentage of members that OC 0034 shares with each listed object.

Visualization

ℹ️

1 2