Theia 3428

0.00 UTI

0.43

C_N

0.31

C_dens

0.75

C_C3

0.06

C_lit

0.0

C_dup

N_m (P>50%) 43

Core radius and density 1.5 [pc], 1.5 [pc^-2]

C3 classification AB

C_N 0.43 Poorly populated
C_dens 0.31 Loose
C_C3 0.75 High quality
C_lit 0.06 Rarely studied
C_dup 0.0 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 3428 is a poorly populated, loose object of high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.

⚠️ Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 0.88 (50th percentile), true positive (human-assigned).

Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.88 (50th percentile), true positive (human-assigned).

Data

🔍 Search references for Theia 3428 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–	90.319	4.565	0.717	0.479	-2.076	33.6
Zhang et al.	2024	90.301	4.602	–	–	–	–
Hunt & Reffert	2024	90.301	4.602	0.707	0.465	-2.07	48.074
Cavallo et al.	2024	90.338	4.527	0.712	–	–	–
Hunt & Reffert	2023	90.301	4.602	0.707	0.465	-2.07	48.074

💡 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–	1.31	1.87	2.52	141	0.150	343	–	–
Zhang et al.	2024	–	–	–	–	0.001⁽¹⁾	–	–	–
Hunt & Reffert	2024	1.31	1.87	2.52	141	–	343⁽¹⁾	–	–
Cavallo et al.	2024	1.43	2.00	–	282	0.300	–	–	–
Hunt & Reffert	2023	1.31	1.87	2.52	141	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 257	100.0	90.33	4.56	0.73	0.49	-2.06	39.31	0.13
UBC 1325	83.7	90.32	4.56	0.72	0.5	-2.08	23.35	0.27

💡 Note: The % column shows the percentage of members that Theia 3428 shares with each listed object.

Visualization

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