OCSN 41

0.59 UTI

0.75

C_N

0.72

C_dens

1.0

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 102

Stellar density (N₅₀/rad) 3.6 [N/pc²]

C3 classification AA

C_N 0.75 Rich
C_dens 0.72 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 41 is a rich, 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, very 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 Very young

Liu et al. (2025)
Classified as primordial binary cluster 317 along with OCSN_40, and of multiple system 9 along with OCSN_40 and Alessi_20.

Palma et al. (2025)
Part of multiple system G228, along with Alessi_20 and OCSN_40.

Cavallo et al. (2024)
Gold sample.

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

Data

🔍 Search references for OCSN 41 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–	1.44	54.559	2.487	8.277	-4.082	-11.577
Liu et al.	2025	1.08	54.29	2.47	8.21	-4.16	-17.13
Cavallo et al.	2024	1.223	54.433	2.47	–	–	–
Hunt & Reffert	2023	1.078	54.29	2.467	8.212	-4.155	-17.126
Qin et al.	2023	1.07	54.32	2.5	8.34	-4.05	-11.46

💡 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–	0.395	0.18	0.24	12	-0.040	–	–	–
Liu et al.	2025	0.35	0.06	–	21	–	–	–	–
Cavallo et al.	2024	0.40	0.66	–	6	-0.040	–	–	–
Hunt & Reffert	2023	0.39	0.08	0.24	7	–	–	–	–
Qin et al.	2023	0.41	0.28	–	16	–	–	–	–

Visualization

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