CWNU 254

0.45 UTI

0.49

C_N

1.0

C_dens

0.75

C_C3

0.0

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 49

Radius (P>50% members) 21.7 [arcmin]

C_N 0.49 Poorly populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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CWNU 254 is a poorly populated, very dense object of high C3 quality. Its parallax locates it at a very close distance, above 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 age parameter (see Parameters). It is rarely studied in the literature.

Note: This object shares a large percentage of members with 4 later reported entries. See table with shared members information.

Very close Low extinction Near-solar metallicity Young

Data

🔍 Search references for CWNU 254 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	–	110.244	3.84	2.159	-6.508	-5.226	12.634
Wei et al.	2025	110.174	3.51	2.142	-6.541	-5.05	–
He et al.	2022	110.115	3.57	2.142	-6.523	-5.129	–
He et al.	2022	110.074	3.896	2.17	-6.53	-5.26	21.1

💡 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]	Bfr	BSS
Wei et al.	2025	0.47	0.08	–	437	0.250	425	0.55	–
He et al.	2022	–	0.10	–	71	–	–	–	–
He et al.	2022	0.52	0.42	–	63	0.169	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OCSN 104	100.0	110.2	3.61	2.13	-6.5	-5.1	13.56	0.48
Theia 172	100.0	110.21	3.7	2.12	-6.5	-5.12	13.56	0.05
CWWDL 14655	95.9	110.32	3.74	2.14	-6.53	-5.24	13.45	0.0
CWWDL 14656	46.9	109.7	3.37	2.13	-6.46	-5.05	15.02	0.0

💡 Note: The % column shows the percentage of members that CWNU 254 shares with each listed object.

Visualization

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