CWNU 207

0.33 UTI

0.0

C_N

0.63

C_dens

0.5

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 22

Stellar density (N₅₀/rad) 3.2 [N/pc²]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.63 Moderately dense
C_C3 0.5 Intermediate quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

ℹ️

CWNU 207 is a sparse, moderately dense object of intermediate C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption and metallicity parameters (see Parameters). It is poorly studied 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.

Close Low extinction Near-solar metallicity Very young

Liu et al. (2025)
Classified as primordial binary cluster 62 along with HSC_2144.

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P10, along with HSC_2144.

Cavallo et al. (2024)
Gold sample.

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

Data

🔍 Search references for CWNU 207 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	135.593	-46.834	1.201	-7.395	5.193	11.382
Cavallo et al.	2024	135.399	-46.77	1.198	–	–	–
Hunt & Reffert	2023	135.758	-46.863	1.183	-7.413	5.21	52.235
He et al.	2022	135.637	-46.855	1.2	-7.49	5.15	–

💡 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–	0.88	0.84	1.49	7	-0.480	–	–	–
Liu et al.	2025	1.24	0.40	–	12	–	–	–	–
Cavallo et al.	2024	0.96	0.87	–	3	-0.030	–	–	–
Hunt & Reffert	2023	0.80	0.81	1.49	4	–	–	–	–
He et al.	2022	0.63	1.38	–	10	-0.930	–	–	–

Visualization

ℹ️

1 2