OC 0357

0.03 UTI

0.77

C_N

1.0

C_dens

0.75

C_C3

0.1

C_lit

0.06

C_dup

N_m (P>50%) 165

Core radius and density 1.2 [pc], 6.8 [pc^-2]

C3 classification AB

C_N 0.77 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.1 Rarely studied
C_dup 0.06 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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OC 0357 is a rich, very dense object of high C3 quality. Its parallax locates it at a 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 metallicity parameter (see Parameters). It is rarely studied in the literature.

⚠️ Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

Close Moderate extinction Near-solar metallicity Very young

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P236, along with NGC_2183.

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.19 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.19 (50th percentile).

Data

🔍 Search references for OC 0357 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–	91.941	-6.401	1.141	-2.811	1.059	35.997
Zhang et al.	2024	91.932	-6.396	–	–	–	–
Hunt & Reffert	2024	91.932	-6.396	1.125	-2.79	0.99	86.293
Cavallo et al.	2024	91.92	-6.378	1.158	–	–	–
Hunt & Reffert	2023	91.932	-6.396	1.125	-2.79	0.99	86.293
Hao et al.	2022	91.961	-6.392	1.187	-2.885	1.07	30.584

💡 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–	0.82	2.41	2.785	4	0.030	346	–	–
Zhang et al.	2024	–	–	–	–	-0.155⁽¹⁾	–	–	–
Hunt & Reffert	2024	0.82	2.45	2.78	4	–	346⁽¹⁾	–	–
Cavallo et al.	2024	1.02	2.37	–	4	0.030	–	–	–
Hunt & Reffert	2023	0.82	2.45	2.79	4	–	–	–	–
Hao et al.	2022	–	1.12	–	5	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
FoF 2262	94.5	91.95	-6.39	1.14	-2.82	1.06	33.79	0.02
MonR2	93.9	91.94	-6.39	1.09	-2.83	1.04	30.75	0.52

💡 Note: The % column shows the percentage of members that OC 0357 shares with each listed object.

Visualization

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