HSC 1540

0.19 UTI

0.0

C_N

0.08

C_dens

0.38

C_C3

0.25

C_lit

1.0

C_dup

C3 classification BC

Number of members (P>50%) 23

Radius (P>50% members) 4.6 [arcmin]

C_N 0.0 Sparse
C_dens 0.08 Very loose
C_C3 0.38 Low quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

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

Overview

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HSC 1540 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.

(*): The parallax distance estimate (~5.74 kpc) differs significantly from the median photometric distance (~4.36 kpc).

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

⚠️ 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.

Distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 1540 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	–	96.791	17.735	0.174	-0.065	-0.469	18.991
Zhang et al.	2024	96.779	17.736	–	–	–	–
Hunt & Reffert	2024	96.779	17.736	0.185	-0.073	-0.406	18.377
Cavallo et al.	2024	96.757	17.761	0.184	–	–	–
Hunt & Reffert	2023	96.779	17.736	0.185	-0.073	-0.406	18.377

💡 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
Zhang et al.	2024	–	–	–	–	-0.117*	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	385*	–	–
Cavallo et al.	2024	4.53	1.49	–	79	0.170	–	–	–
Hunt & Reffert	2023	4.18	0.74	1.46	154	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 4162	80.0	96.78	17.74	0.18	-0.06	-0.48	18.99	0.08

💡 Note: The % column shows the percentage of members that HSC 1540 shares with each listed object.

Visualization

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