CWNU 257

0.20 UTI

0.6

C_N

1.0

C_dens

0.5

C_C3

0.0

C_lit

0.48

C_dup

C3 classification BB

Number of members (P>50%) 71

Radius (P>50% members) 6.6 [arcmin]

C_N 0.6 Moderately populated
C_dens 1.0 Very dense
C_C3 0.5 Intermediate quality
C_lit 0.0 Rarely studied
C_dup 0.48 Possibly duplicate

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

Overview

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CWNU 257 is a moderately populated, very dense object of intermediate C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a metal-rich, intermediate-age cluster (see Parameters). It is rarely studied in the literature.

⚠️ Warning: This is possibly a duplicate object, which shares a significant percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Moderate extinction Metal-rich Intermediate age

Data

🔍 Search references for CWNU 257 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	–	90.332	4.558	0.726	0.487	-2.061	39.312
He et al.	2022	90.356	4.561	0.73	0.53	-2.05	8.8

💡 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
He et al.	2022	1.45	1.68	–	501	0.916	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Theia 3428	60.6	90.32	4.57	0.72	0.48	-2.08	33.6	0.0
UBC 1325	52.1	90.32	4.56	0.72	0.5	-2.08	23.35	0.42

💡 Note: The % column shows the percentage of members that CWNU 257 shares with each listed object.

Visualization

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