HSC 1531

0.16 UTI

0.0

C_N

0.36

C_dens

0.38

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 24

Core radius and density 1.1 [pc], 1.8 [pc^-2]

C3 classification CB

C_N 0.0 Sparse
C_dens 0.36 Loose
C_C3 0.38 Low quality
C_lit 0.03 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 1531 is a sparse, loose object of low C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, 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.

Very close Low extinction Near-solar metallicity Young

Palma et al. (2025)
Classified as optical pair P292, along with CWNU_1111.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.40 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.40 (50th percentile).

Data

🔍 Search references for HSC 1531 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–	87.205	13.889	3.615	5.08	-13.123	22.424
Zhang et al.	2024	87.328	13.836	–	–	–	–
Cavallo et al.	2024	87.273	14.41	3.612	–	–	–
Hunt & Reffert	2023	87.328	13.836	3.616	5.181	-13.155	15.577

💡 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–	0.27	0.4	0.59	56	0.074	–	–	–
Zhang et al.	2024	–	–	–	–	0.099⁽¹⁾	–	–	–
Cavallo et al.	2024	0.27	0.64	–	31	0.050	–	–	–
Hunt & Reffert	2023	0.27	0.16	0.59	81	–	–	–	–

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

Visualization

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