HSC 143

0.53 UTI

0.39

C_N

1.0

C_dens

0.75

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 39

Stellar density (N₅₀/rad) 5.7 [N/pc²]

C3 classification AB

C_N 0.39 Poorly populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 143 is a poorly populated, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption and age parameters (see Parameters). It was recently reported in the literature.

Relatively close Low extinction Near-solar metallicity Very young

Liu et al. (2025)
Classified as primordial binary cluster 108 along with CWNU_1630, and of multiple system 39 along with CWNU_1630 and HSC_135.

Palma et al. (2025)
Part of multiple system G70, along with Dias_5, CWNU_1630 and HSC_135.

Cavallo et al. (2024)
Wood sample.

Data

🔍 Search references for HSC 143 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–	274.329	-20.404	0.747	0.874	-1.141	-9.797
Liu et al.	2025	274.35	-20.41	0.74	0.88	-1.15	-9.79
Hunt & Reffert	2024	274.352	-20.415	0.738	0.883	-1.149	-9.793
Cavallo et al.	2024	274.326	-20.402	0.739	–	–	–
Hunt & Reffert	2023	274.352	-20.415	0.738	0.883	-1.149	-9.793

💡 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–	1.47	0.76	1.15	9	-0.130	202	–	–
Liu et al.	2025	1.47	0.28	–	9	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	202⁽¹⁾	–	–
Cavallo et al.	2024	1.71	0.76	–	55	-0.130	–	–	–
Hunt & Reffert	2023	1.26	1.05	1.15	5	–	–	–	–

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

Visualization

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