CWNU 1054

(OCSN 170)

0.22 UTI

0.29

C_N

0.23

C_dens

0.25

C_C3

0.16

C_lit

1.0

C_dup

N₅₀ (P>50% members) 29

Stellar density (N₅₀/rad) 1.2 [N/pc²]

C3 classification DB

C_N 0.29 Poorly populated
C_dens 0.23 Very loose
C_C3 0.25 Low quality
C_lit 0.16 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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CWNU 1054 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is rarely studied in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Close Moderate extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as primordial binary cluster 86 along with Sigma_Orionis, and of multiple system 3 along with ASCC_18, Sigma_Orionis, OCSN_65 and Theia_13.

Palma et al. (2025)
Part of multiple system G258, along with NGC_2068 and UPK_402.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.95 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.95 (50th percentile).

Data

🔍 Search references for CWNU 1054 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–	89.405	0.731	2.392	-2.15	-1.95	18.072
Liu et al.	2025	89.73	0.95	2.38	-2.22	-1.89	14.17
Yang et al.	2025	89.728	0.954	–	–	–	–
Zhang et al.	2024	89.728	0.954	–	–	–	–
Cavallo et al.	2024	89.543	0.669	2.378	–	–	–
Hunt & Reffert	2023	89.728	0.954	2.377	-2.222	-1.889	14.173
Qin et al.	2023	89.73	0.83	2.39	-2.18	-1.94	19.1
He et al.	2022	89.391	0.657	2.392	-2.189	-1.959	–

💡 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–	0.53	1.04	0.82	88	-0.052	–	–	–
Liu et al.	2025	1.04	0.55	–	34	–	–	–	–
Yang et al.	2025	–	–	–	120	-0.200⁽³⁾	–	–	–
Zhang et al.	2024	–	–	–	–	-0.052⁽¹⁾	–	–	–
Cavallo et al.	2024	0.44	1.22	–	56	0.190	–	–	–
Hunt & Reffert	2023	0.40	0.89	0.82	121	–	–	–	–
Qin et al.	2023	0.62	1.04	–	398	–	–	–	–
He et al.	2022	–	1.35	–	50	–	–	–	–

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

Visualization

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