OC 0339

0.30 UTI

0.27

C_N

0.37

C_dens

1.0

C_C3

0.25

C_lit

0.7

C_dup

N₅₀ (P>50% members) 27

Stellar density (N₅₀/rad) 1.9 [N/pc²]

C3 classification AA

C_N 0.27 Poorly populated
C_dens 0.37 Loose
C_C3 1.0 Very high quality
C_lit 0.25 Poorly studied
C_dup 0.7 Likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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OC 0339 is a poorly populated, loose object of very high C3 quality. Its parallax locates it at a very 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 age parameter (see Parameters). It is poorly studied in the literature.

Note: This is likely a unique object, which shares a moderate percentage of members with at least one previously reported entry. See table with shared members information.

Very close Moderate extinction Near-solar metallicity Young

Palma et al. (2025)
Part of multiple system G10, along with ASCC_19, ASCC_20, OCSN_61 and UBC_17a.

Cavallo et al. (2024)
Silver sample.

Data

🔍 Search references for OC 0339 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–	83.1	-0.477	2.753	1.586	-0.977	20.798
Hunt & Reffert	2024	83.119	-0.419	2.759	1.667	-1.028	29.1
Cavallo et al.	2024	83.271	-0.537	2.758	–	–	–
Hunt & Reffert	2023	83.119	-0.419	2.759	1.667	-1.028	29.1
Hao et al.	2022	83.047	-0.304	2.714	1.478	-0.863	–

💡 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–	0.36	1.54	1.58	20	0.137	56	–	–
Hunt & Reffert	2024	–	–	–	–	–	56⁽¹⁾	–	–
Cavallo et al.	2024	0.37	1.37	–	20	0.000	–	–	–
Hunt & Reffert	2023	0.35	2.73	1.58	79	–	–	–	–
Hao et al.	2022	–	1.54	–	6	0.274	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 17 a	29.6	83.45	-1.71	2.76	1.61	-1.22	17.6	0.56
ASCC 19	3.7	82.05	-1.96	2.8	1.15	-1.22	19.28	0.96

💡 Note: The % column shows the percentage of members that OC 0339 shares with each listed object.

Visualization

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