CWNU 4840

0.05 UTI

0.0

C_N

0.02

C_dens

0.25

C_C3

0.0

C_lit

1.0

C_dup

C3 classification DB

Number of members (P>50%) 19

Radius (P>50% members) 2.9 [arcmin]

C_N 0.0 Sparse
C_dens 0.02 Very loose
C_C3 0.25 Low 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 4840 is a sparse, very loose object of low C3 quality. Its parallax locates it at a very large distance, well below the mid-plane, affected by low extinction. It is catalogued as an extremely old cluster (see Parameters). It was recently reported 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.

Extremely distant Low extinction Extremely old

Data

🔍 Search references for CWNU 4840 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	–	268.568	-37.246	0.061	-1.13	-4.829	34.21
He et al.	2023	268.568	-37.255	0.06	-1.063	-4.754	34.21

💡 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.	2023	17.78	0.40	–	12589	–	–	–	–

Visualization

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