OC 0356

0.44 UTI

0.75

C_N

1.0

C_dens

1.0

C_C3

0.06

C_lit

0.76

C_dup

N_m (P>50%) 107

Core radius and density 1.3 [pc], 7.1 [pc^-2]

C3 classification AA

C_N 0.75 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.06 Rarely studied
C_dup 0.76 Very likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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OC 0356 is a rich, very dense 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, very young cluster, but with a large variance across recent sources for the distance and age parameters (see Parameters). It is rarely studied in the literature.

(*): The parallax distance estimate (~0.44 kpc) differs significantly from the median photometric distance (~0.79 kpc).

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

Close Moderate extinction Near-solar metallicity Very young

Liu et al. (2025)
Classified as primordial binary cluster 89 along with CWNU_1072.

Palma et al. (2025)
Part of multiple system G210, along with OCSN_70 and L_1641S.

Cavallo et al. (2024)
Wood sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.84 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.84 (50th percentile).

Data

🔍 Search references for OC 0356 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–	85.301	-9.475	2.254	0.562	-1.278	15.986
Cavallo et al.	2024	85.291	-9.564	2.219	–	–	–
Hunt & Reffert	2023	85.286	-9.524	2.217	0.549	-1.481	52.254
Hao et al.	2022	85.272	-9.388	2.255	0.511	-1.229	22.144

💡 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–	0.79	1.73	1.01	9	0.195	–	–	–
Liu et al.	2025	1.78	1.14	–	23	–	–	–	–
Cavallo et al.	2024	0.79	2.86	–	13	0.250	–	–	–
Hunt & Reffert	2023	0.43	2.24	1.01	5	–	–	–	–
Hao et al.	2022	–	1.22	–	2	0.140	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OCSN 70	100.0	85.34	-9.45	2.27	0.53	-1.21	16.14	0.26
FSR 1088	24.3	85.27	-9.35	2.29	0.49	-1.2	16.61	0.47
IRAS 05401-1002	12.1	85.66	-9.98	2.15	0.41	-1.32	–	0.45
Cmg 109	4.7	85.25	-8.97	2.22	0.48	-1.0	16.48	0.45
IRAS 05404-0946	1.9	85.74	-9.8	2.22	0.33	-1.15	–	0.45

💡 Note: The % column shows the percentage of members that OC 0356 shares with each listed object.

Visualization

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