CWNU 309

0.02 UTI

0.49

C_N

1.0

C_dens

0.75

C_C3

0.0

C_lit

0.04

C_dup

C3 classification AB

Number of members (P>50%) 49

Radius (P>50% members) 2.2 [arcmin]

C_N 0.49 Poorly populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.0 Rarely studied
C_dup 0.04 Very likely duplicate

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

Overview

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CWNU 309 is a poorly populated, very dense object of high C3 quality. Its parallax locates it at a relatively close^* distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It is rarely studied in the literature.

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

(*): The parallax distance estimate (~1.60 kpc) differs significantly from the median photometric distance (~1.20 kpc).

Relatively close Moderate extinction Near-solar metallicity Very young

Data

🔍 Search references for CWNU 309 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	–	319.5	60.083	0.624	-4.635	-3.499	-21.773
He et al.	2022	319.491	60.084	0.62	-4.63	-3.53	–

💡 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	1.20	1.92	–	6	0.169	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 1150	95.9	319.5	60.08	0.62	-4.64	-3.48	-21.77	0.55

💡 Note: The % column shows the percentage of members that CWNU 309 shares with each listed object.

Visualization

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