OCSN 24

0.56 UTI

0.74

C_N

0.55

C_dens

1.0

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 98

Stellar density (N₅₀/rad) 2.7 [N/pc²]

C3 classification AA

C_N 0.74 Moderately populated
C_dens 0.55 Moderately dense
C_C3 1.0 Very high quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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OCSN 24 is a moderately populated, moderately dense object of very 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, but with a large variance across recent sources for the absorption parameter (see Parameters). It was recently reported in the literature.

Very close Low extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as primordial binary cluster 173 along with HSC_758, and of multiple system 48 along with HSC_758 and HSC_719.

Palma et al. (2025)
Part of multiple system G193, along with HSC_629 and HSC_758.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as a moving group.

Data

🔍 Search references for OCSN 24 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–	314.24	47.983	6.236	13.101	2.674	-23.231
Liu et al.	2025	314.77	48.76	6.31	13.34	2.83	-24.59
Cavallo et al.	2024	313.726	48.028	6.322	–	–	–
Hunt & Reffert	2023	314.772	48.761	6.313	13.339	2.832	-24.593
Qin et al.	2023	313.69	48.17	6.1	12.11	2.54	-23.45

💡 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–	0.16	0.09	0.48	56	0.060	–	–	–
Liu et al.	2025	0.18	0.07	–	54	–	–	–	–
Cavallo et al.	2024	0.16	0.54	–	55	0.060	–	–	–
Hunt & Reffert	2023	0.16	0.11	0.48	56	–	–	–	–
Qin et al.	2023	0.16	0.03	–	112	–	–	–	–

Visualization

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