Theia 5426

0.06 UTI

0.0

C_N

0.0

C_dens

0.25

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 14

Core radius and density 4.4 [pc], 0.02 [pc^-2]

C3 classification DB

C_N 0.0 Sparse
C_dens 0.0 Very loose
C_C3 0.25 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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Theia 5426 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by high extinction. It is catalogued as a very massive, near-solar metallicity, young cluster, but with a large variance across recent sources for the age parameter (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 distant High extinction Very massive Near-solar metallicity Young

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.12 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.12 (50th percentile).

Data

🔍 Search references for Theia 5426 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–	145.891	-53.943	0.14	-4.134	3.188	51.066
Hunt & Reffert	2024	145.893	-53.974	0.146	-4.172	3.152	33.913
Cavallo et al.	2024	145.911	-53.976	0.147	–	–	–
Hunt & Reffert	2023	145.893	-53.974	0.146	-4.172	3.152	33.913

💡 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–	5.59	3.17	2.795	77	0.430	5638	–	–
Hunt & Reffert	2024	5.59	3.17	2.80	77	–	5638⁽¹⁾	–	–
Cavallo et al.	2024	5.37	2.71	–	257	0.430	–	–	–
Hunt & Reffert	2023	5.59	3.17	2.79	77	–	–	–	–

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

Visualization

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