OCSN 59

0.61 UTI

0.55

C_N

1.0

C_dens

1.0

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 59

Stellar density (N₅₀/rad) 7.7 [N/pc²]

C3 classification AA

C_N 0.55 Moderately populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.25 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 59 is a moderately populated, very dense object of very 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, very young cluster, but with a large variance across recent sources for the absorption parameter (see Parameters). It was recently reported in the literature.

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

Very close Low extinction Near-solar metallicity Very young

Liu et al. (2025)
Classified as primordial binary cluster 319 along with HSC_1633, and of multiple system 57 along with NGC_1980 and HSC_1633.

Palma et al. (2025)
Part of multiple system G124, along with NGC_1980 and HSC_1633.

Cavallo et al. (2024)
Silver sample.

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

Data

🔍 Search references for OCSN 59 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–	77.141	-3.206	2.584	1.213	-0.943	22.683
Liu et al.	2025	76.84	-3.34	2.58	1.2	-0.86	17.39
Cavallo et al.	2024	77.27	-2.948	2.586	–	–	–
Hunt & Reffert	2023	76.844	-3.336	2.584	1.197	-0.859	17.392
Qin et al.	2023	77.03	-3.25	2.61	1.26	-0.8	15.41

💡 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–	0.41	0.38	1.3	7	0.160	–	–	–
Liu et al.	2025	0.51	0.04	–	3	–	–	–	–
Cavallo et al.	2024	0.39	0.90	–	11	0.160	–	–	–
Hunt & Reffert	2023	0.38	0.45	1.30	6	–	–	–	–
Qin et al.	2023	0.43	0.31	–	8	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
LISC-III 3613	91.5	77.17	-3.08	2.59	1.22	-0.8	24.1	0.14

💡 Note: The % column shows the percentage of members that OCSN 59 shares with each listed object.

Visualization

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