CWNU 1627

0.22 UTI

0.3

C_N

0.16

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 30

Core radius and density 2.8 [pc], 0.8 [pc^-2]

C3 classification BB

C_N 0.3 Poorly populated
C_dens 0.16 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.06 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 1627 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by high extinction. It is catalogued as a young 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.

Relatively close High extinction Young

Palma et al. (2025)
Classified as optical pair P324, along with Harvard_16.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.05 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.05 (50th percentile).

Data

🔍 Search references for CWNU 1627 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–	263.08	-36.2	0.648	1.282	-1.236	30.49
Hunt & Reffert	2024	263.146	-36.23	0.641	1.287	-1.236	30.511
Hunt & Reffert	2023	263.146	-36.23	0.641	1.287	-1.236	30.511
He et al.	2023	263.076	-36.2	0.659	1.272	-1.225	–

💡 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–	1.44	3.31	2.19	29	–	177	–	–
Hunt & Reffert	2024	1.44	3.31	2.19	29	–	177⁽¹⁾	–	–
Hunt & Reffert	2023	1.44	3.31	2.19	29	–	–	–	–
He et al.	2023	1.55	3.10	–	6	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization

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