OCSN 285

0.31 UTI

0.78

C_N

1.0

C_dens

1.0

C_C3

0.0

C_lit

0.57

C_dup

N₅₀ (P>50% members) 171

Stellar density (N₅₀/rad) 9.3 [N/pc²]

C3 classification AA

C_N 0.78 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.0 Rarely studied
C_dup 0.57 Likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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OCSN 285 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 low extinction. It is catalogued as a very young cluster (see Parameters). It was recently reported in the literature.

(*): The parallax distance estimate (~0.37 kpc) differs significantly from the median photometric distance (~0.56 kpc).

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

Close Low extinction Very young

Data

🔍 Search references for OCSN 285 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–	60.524	32.248	2.688	3.602	-5.24	20.313
Qin et al.	2023	60.56	32.16	2.64	3.55	-5.18	18.41

💡 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–	0.56	0.99	–	9	–	–	–	–
Qin et al.	2023	0.56	0.99	–	9	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 31	43.3	60.98	32.35	2.74	3.75	-5.38	18.67	0.71
OC 0280	20.5	60.57	32.15	2.65	3.6	-5.21	21.76	0.21
CWNU 442	2.9	63.19	31.6	2.78	3.68	-5.65	19.87	0.4

💡 Note: The % column shows the percentage of members that OCSN 285 shares with each listed object.

Visualization

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