CWNU 1889

0.11 UTI

0.0

C_N

0.28

C_dens

0.25

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 23

Stellar density (N₅₀/rad) 1.4 [N/pc²]

C3 classification DB

C_N 0.0 Sparse
C_dens 0.28 Loose
C_C3 0.25 Low 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

ℹ️

CWNU 1889 is a sparse, loose object of low C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (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.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as a moving group.

Data

🔍 Search references for CWNU 1889 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	123.544	-38.513	0.542	-2.212	1.556	–
Cavallo et al.	2024	123.531	-38.573	0.542	–	–	–
Hunt & Reffert	2023	123.398	-38.5	0.537	-2.211	1.541	–
He et al.	2023	123.587	-38.499	0.549	-2.216	1.553	–

💡 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–	1.74	2.62	1.13	148	0.050	–	–	–
Cavallo et al.	2024	1.71	3.15	–	148	0.050	–	–	–
Hunt & Reffert	2023	1.77	2.62	1.13	100	–	–	–	–
He et al.	2023	1.74	2.30	–	1122	–	–	–	–

Visualization

ℹ️

1 2