OCSN 81

0.02 UTI

0.0

C_N

0.18

C_dens

0.25

C_C3

0.0

C_lit

0.28

C_dup

C3 classification DB

Number of members (P>50%) 24

Radius (P>50% members) 56.0 [arcmin]

C_N 0.0 Sparse
C_dens 0.18 Very loose
C_C3 0.25 Low quality
C_lit 0.0 Rarely studied
C_dup 0.28 Possibly duplicate

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

Overview

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OCSN 81 is a sparse, very loose object of low C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low extinction. It is catalogued as an intermediate-age cluster (see Parameters). It was recently reported in the literature.

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

Very close Low extinction Intermediate age

Data

🔍 Search references for OCSN 81 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	–	91.011	-27.098	3.186	-6.588	0.264	3.263
Qin et al.	2023	91.48	-27.03	3.19	-6.74	0.41	1.51

💡 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
Qin et al.	2023	0.33	0.12	–	447	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
ESO 489 01	72.0	90.79	-27.21	3.19	-6.54	0.01	3.26	0.2
Theia 229	52.0	90.59	-27.98	3.2	-6.52	-0.17	2.03	0.12

💡 Note: The % column shows the percentage of members that OCSN 81 shares with each listed object.

Visualization

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