OCSN 50

0.29 UTI

0.33

C_N

0.18

C_dens

0.75

C_C3

0.1

C_lit

1.0

C_dup

N_m (P>50%) 33

Core radius and density 1.9 [pc], 0.9 [pc^-2]

C3 classification AB

C_N 0.33 Poorly populated
C_dens 0.18 Very loose
C_C3 0.75 High quality
C_lit 0.1 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

OCSN 50 is a poorly populated, very loose object of 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, young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It was recently reported in the literature.

Very close Low extinction Near-solar metallicity Young

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.25 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.25 (50th percentile).

Data

🔍 Search references for OCSN 50 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	62.11	21.466	5.156	5.663	-5.97	15.293
Yang et al.	2025	62.36	21.42	–	–	–	–
Zhang et al.	2024	62.36	21.42	–	–	–	–
Cavallo et al.	2024	61.595	21.679	5.236	–	–	–
Hunt & Reffert	2023	62.36	21.42	5.24	5.817	-5.997	35.675
Qin et al.	2023	62.27	21.5	5.07	4.84	-6.04	14.52

💡 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–	0.2	0.98	0.71	20	0.023	–	–	–
Yang et al.	2025	–	–	–	20	-0.190⁽³⁾	–	–	–
Zhang et al.	2024	–	–	–	–	0.023⁽¹⁾	–	–	–
Cavallo et al.	2024	0.19	1.07	–	26	0.150	–	–	–
Hunt & Reffert	2023	0.20	0.75	0.71	20	–	–	–	–
Qin et al.	2023	0.30	0.98	–	16	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization

ℹ️

1 2