Theia 3409

0.04 UTI

0.75

C_N

1.0

C_dens

0.75

C_C3

0.06

C_lit

0.07

C_dup

N₅₀ (P>50% members) 102

Stellar density (N₅₀/rad) 10.5 [N/pc²]

C3 classification AB

C_N 0.75 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.06 Rarely studied
C_dup 0.07 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 3409 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by low 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 Low extinction Near-solar metallicity Intermediate age

Liu et al. (2025)
Classified as primordial binary cluster 366 along with UBC_1481.

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P579, along with UBC_1481.

Cavallo et al. (2024)
Gold sample.

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

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

Data

🔍 Search references for Theia 3409 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–	159.031	-60.646	0.401	-7.722	2.651	-7.446
Hunt & Reffert	2024	159.056	-60.648	0.387	-7.69	2.67	-7.465
Cavallo et al.	2024	159.045	-60.64	0.392	–	–	–
Hunt & Reffert	2023	159.056	-60.648	0.387	-7.69	2.67	-7.465

💡 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–	2.29	0.38	0.91	132	0.190	635	–	–
Liu et al.	2025	2.78	0.19	–	83	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	635⁽¹⁾	–	–
Cavallo et al.	2024	2.17	0.38	–	132	0.190	–	–	–
Hunt & Reffert	2023	2.29	0.50	0.91	179	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 1483	93.1	159.03	-60.64	0.41	-7.72	2.65	-7.45	0.5
CWWDL 5091	61.8	159.03	-60.63	0.41	-7.69	2.64	-7.45	0.04

💡 Note: The % column shows the percentage of members that Theia 3409 shares with each listed object.

Visualization

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