HSC 1439

0.21 UTI

0.0

C_N

0.04

C_dens

0.5

C_C3

0.25

C_lit

1.0

C_dup

C3 classification BB

Number of members (P>50%) 16

Radius (P>50% members) 4.7 [arcmin]

C_N 0.0 Sparse
C_dens 0.04 Very loose
C_C3 0.5 Intermediate 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 1439 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a large^* distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It was recently reported in the literature.

(*): The parallax distance estimate (~6.99 kpc) differs significantly from the median photometric distance (~5.05 kpc).

⚠️ 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 distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 1439 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	–	84.662	25.225	0.143	0.322	-0.283	–
Hu & Soubiran	2025	84.622	25.243	–	–	–	–
Hunt & Reffert	2024	84.627	25.207	0.144	0.313	-0.289	–
Cavallo et al.	2024	84.622	25.243	0.141	–	–	–
Hunt & Reffert	2023	84.627	25.207	0.144	0.313	-0.289	–

💡 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
Hu & Soubiran	2025	–	–	–	–	-0.350*	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	393*	–	–
Cavallo et al.	2024	4.43	1.78	–	575	0.590	–	–	–
Hunt & Reffert	2023	5.68	2.58	1.82	74	–	–	–	–

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

Visualization

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