Theia 3455

0.05 UTI

0.0

C_N

0.19

C_dens

0.75

C_C3

0.25

C_lit

0.16

C_dup

C3 classification AB

Number of members (P>50%) 24

Radius (P>50% members) 9.0 [arcmin]

C_N 0.0 Sparse
C_dens 0.19 Very loose
C_C3 0.75 High quality
C_lit 0.25 Poorly studied
C_dup 0.16 Likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Theia 3455 is a sparse, very loose object of high C3 quality. Its parallax locates it at a relatively close distance, above 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 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.

Data

🔍 Search references for Theia 3455 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	–	282.2	9.424	0.522	-0.157	-1.387	17.439
Hu & Soubiran	2025	282.172	9.458	–	–	–	–
Hunt & Reffert	2024	282.218	9.383	0.523	-0.147	-1.377	24.033
Cavallo et al.	2024	282.172	9.458	0.523	–	–	–
Hunt & Reffert	2023	282.218	9.383	0.523	-0.147	-1.377	24.033

💡 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]	Bfr	BSS
Hu & Soubiran	2025	–	–	–	–	0.020*	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	76*	–	–
Cavallo et al.	2024	1.73	1.85	–	631	0.220	–	–	–
Hunt & Reffert	2023	1.87	1.84	1.39	578	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 2694	84.0	282.18	9.47	0.52	-0.16	-1.39	23.33	0.25

💡 Note: The % column shows the percentage of members that Theia 3455 shares with each listed object.

Visualization

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