CWNU 1540

0.35 UTI

0.34

C_N

0.14

C_dens

0.75

C_C3

0.25

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 34

Radius (P>50% members) 7.4 [arcmin]

C_N 0.34 Poorly populated
C_dens 0.14 Very loose
C_C3 0.75 High quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

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Overview

CWNU 1540 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It was recently reported in the literature.

Relatively close Moderate extinction Near-solar metallicity Young

Cavallo et al. (2024): Gold sample.

Data

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	–	109.874	-15.892	0.311	-2.642	2.962	–
Hunt & Reffert	2024	109.904	-15.936	0.311	-2.646	2.948	76.473
Cavallo et al.	2024	109.818	-15.772	0.313	–	–	–
Hunt & Reffert	2023	109.904	-15.936	0.311	-2.646	2.948	76.473
He et al.	2023	109.817	-15.785	0.313	-2.616	2.935	–

💡 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
Hunt & Reffert	2024	–	–	–	–	–	216*	–	–
Cavallo et al.	2024	2.74	1.35	–	76	-0.170	–	–	–
Hunt & Reffert	2023	2.83	1.15	1.27	77	–	–	–	–
He et al.	2023	2.95	1.25	–	40	–	–	–	–

💡 Note: The parameters are sometimes transformed from their original values to match the format of the columns shown here, see FAQ. The columns DAv, Bfr, BSS correspond to differential extinction, binary fraction, and blue stragglers, respectively. BSS values can be listed as fractions or integers.
(*): indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization

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💡 Note: How are the galactocentric plots generated? See FAQ.