CWNU 1004

0.41 UTI

0.41

C_N

0.64

C_dens

1.0

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 41

Stellar density (N₅₀/rad) 3.2 [N/pc²]

C3 classification AA

C_N 0.41 Poorly populated
C_dens 0.64 Moderately dense
C_C3 1.0 Very high quality
C_lit 0.0 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 1004 is a poorly populated, moderately dense object of very high C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption and age parameters (see Parameters). It is rarely studied in the literature.

Note: This object shares a moderate percentage of members with at least one entry reported in the same catalogue. See table with shared members information.

Very close Moderate extinction Near-solar metallicity Very young

Liu et al. (2025)
Classified as primordial binary cluster 82 along with OC_0666, and of multiple system 28 along with OC_0666 and UPK_640.

Palma et al. (2025)
Classified as genetic pair P193, along with OC_0666.

Cavallo et al. (2024)
Wood sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.89 (50th percentile).

Data

🔍 Search references for CWNU 1004 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–	240.206	-41.679	6.245	-10.929	-23.513	-2.11
Liu et al.	2025	239.73	-42.01	6.26	-11.06	-23.51	-2.01
Cavallo et al.	2024	239.844	-42.107	6.257	–	–	–
Hunt & Reffert	2023	239.73	-42.008	6.257	-11.058	-23.509	-2.013
He et al.	2022	239.698	-42.032	6.259	-11.103	-23.516	–

💡 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	1.575	1.22	18	0.290	–	–	–
Liu et al.	2025	0.25	0.60	–	25	–	–	–	–
Cavallo et al.	2024	0.16	1.98	–	129	0.290	–	–	–
Hunt & Reffert	2023	0.16	1.17	1.22	6	–	–	–	–
He et al.	2022	–	2.95	–	11	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 1014	43.9	242.2	-39.07	6.28	-9.91	-23.43	-2.54	0.31
OCSN 214	41.5	242.2	-39.07	6.28	-9.87	-23.51	-2.45	0.0

💡 Note: The % column shows the percentage of members that CWNU 1004 shares with each listed object.

Visualization

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