Theia 4007

0.06 UTI

0.0

C_N

0.15

C_dens

0.5

C_C3

0.25

C_lit

0.28

C_dup

N₅₀ (P>50% members) 20

Stellar density (N₅₀/rad) 0.8 [N/pc²]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.15 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.25 Poorly studied
C_dup 0.28 Possibly duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 4007 is a sparse, very loose object of intermediate 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, intermediate-age cluster (see Parameters). It was recently reported in the literature.

⚠️ Warning: This is possibly a duplicate object, which shares a significant 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

Palma et al. (2025)
Classified as optical pair P581, along with Theia_3986.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Theia 4007 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–	323.839	49.578	0.543	-2.844	-4.517	–
Zhang et al.	2024	323.761	49.615	–	–	–	–
Hunt & Reffert	2024	323.761	49.615	0.546	-2.795	-4.499	-40.819
Cavallo et al.	2024	323.812	49.582	0.542	–	–	–
Hunt & Reffert	2023	323.761	49.615	0.546	-2.795	-4.499	-40.819

💡 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–	1.745	0.66	0.27	520	-0.006	63	–	–
Zhang et al.	2024	–	–	–	–	-0.153⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	63⁽¹⁾	–	–
Cavallo et al.	2024	1.75	0.76	–	407	0.140	–	–	–
Hunt & Reffert	2023	1.74	0.56	0.27	632	–	–	–	–

(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 1545	72.0	323.88	49.6	0.53	-2.88	-4.55	–	0.12

💡 Note: The % column shows the percentage of members that Theia 4007 shares with each listed object.

Visualization

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