OCSN 90

0.02 UTI

0.79

C_N

1.0

C_dens

0.75

C_C3

0.0

C_lit

0.03

C_dup

C3 classification AB

Number of members (P>50%) 194

Radius (P>50% members) 34.0 [arcmin]

C_N 0.79 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.0 Rarely studied
C_dup 0.03 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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OCSN 90 is a rich, very dense object of high C3 quality. Its parallax locates it at a very close^* distance, near 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.

⚠️ 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.

(*): The parallax distance estimate (~0.45 kpc) differs significantly from the median photometric distance (~0.65 kpc).

Close Low extinction Near-solar metallicity Young

Data

🔍 Search references for OCSN 90 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	–	207.807	-63.571	2.236	-8.39	-5.429	-11.95
Wei et al.	2025	207.728	-63.486	2.234	-8.392	-5.442	–
Qin et al.	2023	207.83	-63.52	2.23	-8.51	-5.31	-12.38

💡 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]	Bfr	BSS
Wei et al.	2025	0.74	0.78	–	33	0.250	186	0.29	–
Qin et al.	2023	0.55	0.50	–	100	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Platais 12	96.9	208.01	-63.54	2.22	-8.35	-5.44	-11.95	0.86
CWWDL 14613	46.4	207.78	-63.51	2.24	-8.38	-5.46	-11.95	0.0

💡 Note: The % column shows the percentage of members that OCSN 90 shares with each listed object.

Visualization

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