HSC 2126

0.15 UTI

0.26

C_N

0.03

C_dens

0.38

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 26

Core radius and density 3.9 [pc], 0.2 [pc^-2]

C3 classification CB

C_N 0.26 Poorly populated
C_dens 0.03 Very 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 2126 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a 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.

Close Low extinction Near-solar metallicity Young

Palma et al. (2025)
Part of multiple system G143, along with HSC_2215, Theia_105 and HSC_2235.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for HSC 2126 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–	133.547	-44.405	1.877	-11.943	9.874	15.696
Swiggum et al.	2024	133.071	-43.427	1.888	-12.011	9.822	15.369
Cavallo et al.	2024	134.113	-44.858	1.9	–	–	–
Hunt & Reffert	2023	133.071	-43.427	1.888	-12.011	9.822	16.734

💡 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–	0.52	0.19	0.55	65	0.100	207	–	–
Swiggum et al.	2024	0.52	–	–	65	–	207	–	–
Cavallo et al.	2024	0.57	0.29	–	31	0.100	–	–	–
Hunt & Reffert	2023	0.51	0.09	0.55	65	–	–	–	–

Visualization

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