OCSN 57

0.10 UTI

0.82

C_N

1.0

C_dens

1.0

C_C3

0.0

C_lit

0.18

C_dup

C3 classification AA

Number of members (P>50%) 290

Radius (P>50% members) 44.3 [arcmin]

C_N 0.82 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.0 Rarely studied
C_dup 0.18 Likely duplicate

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

Overview

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OCSN 57 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 young cluster (see Parameters). It was recently reported in the literature.

⚠️ Warning: This is likely a duplicate object, which shares a large percentage of members with at least one previously reported entry, and a small percentage with at least one entry reported in the same catalogue. See table with shared members information.

Very close Low extinction Young

Data

🔍 Search references for OCSN 57 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	–	82.083	1.667	2.739	-0.525	0.787	29.188
Qin et al.	2023	82.1	1.71	2.73	-0.49	0.8	30.01

💡 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	0.37	0.12	–	20	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
ASCC 20	81.7	82.08	1.66	2.75	-0.56	0.78	29.19	0.86
FoF 2371	37.9	82.39	2.02	2.69	-0.68	0.69	29.78	0.13
OCSN 56	18.3	82.64	2.37	2.53	-0.82	0.53	31.28	0.2
ASCC 18	1.4	81.53	0.32	2.4	0.15	1.39	25.21	0.84
OCSN 58	0.3	81.25	0.32	2.4	0.15	1.36	26.71	0.01

💡 Note: The % column shows the percentage of members that OCSN 57 shares with each listed object.

Visualization

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