OCSN 54

0.52 UTI

0.57

C_N

0.66

C_dens

0.75

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 65

Stellar density (N₅₀/rad) 3.3 [N/pc²]

C3 classification AB

C_N 0.57 Moderately populated
C_dens 0.66 Moderately dense
C_C3 0.75 High quality
C_lit 0.3 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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OCSN 54 is a moderately populated, moderately dense object of high C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It was recently reported in the literature.

Note: This object shares a very small percentage of members with at least one entry reported in the same catalogue. See table with shared members information.

Close Low extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as primordial binary cluster 318 along with Theia_818.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as a moving group.

Data

🔍 Search references for OCSN 54 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–	77.572	17.522	2.325	0.597	-5.46	15.205
Zhang et al.	2024	77.622	17.431	–	–	–	–
Cavallo et al.	2024	77.567	18.111	2.266	–	–	–
Hunt & Reffert	2023	77.622	17.431	2.267	0.632	-5.448	14.302
Qin et al.	2023	77.62	17.42	2.36	0.59	-5.52	12.5

💡 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–	0.535	0.715	0.66	31	-0.013	–	–	–
Liu et al.	2025	0.60	0.27	–	30	–	–	–	–
Zhang et al.	2024	–	–	–	–	-0.095⁽¹⁾	–	–	–
Cavallo et al.	2024	0.49	0.98	–	9	0.070	–	–	–
Hunt & Reffert	2023	0.42	0.62	0.66	35	–	–	–	–
Qin et al.	2023	0.58	0.81	–	32	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OCSN 111	6.2	79.29	18.61	2.83	-0.11	-5.87	21.26	0.46

💡 Note: The % column shows the percentage of members that OCSN 54 shares with each listed object.

Visualization

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