Theia 2901

0.02 UTI

0.31

C_N

0.42

C_dens

0.5

C_C3

0.3

C_lit

0.06

C_dup

N₅₀ (P>50% members) 31

Stellar density (N₅₀/rad) 2.1 [N/pc²]

C3 classification BB

C_N 0.31 Poorly populated
C_dens 0.42 Loose
C_C3 0.5 Intermediate quality
C_lit 0.3 Poorly studied
C_dup 0.06 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 2901 is a poorly populated, 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 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 tidal capture (resonant trapping binary) 38 along with Berkeley_14A, and as tidal capture (resonant trapping binary) 145 along with FSR_0732, and of multiple system 18 along with FSR_0732 and Berkeley_14A.

Palma et al. (2025)
Part of multiple system G86, along with FSR_0732 and Berkeley_14A.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Theia 2901 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–	75.819	42.109	0.844	1.022	-3.425	-19.179
Liu et al.	2025	75.84	42.09	0.84	1.06	-3.42	-18.53
Zhang et al.	2024	75.835	42.089	–	–	–	–
Hunt & Reffert	2024	75.835	42.089	0.842	1.061	-3.415	-18.534
Cavallo et al.	2024	75.831	42.097	0.844	–	–	–
Hunt & Reffert	2023	75.835	42.089	0.842	1.061	-3.415	-18.534

💡 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–	1.16	0.36	0.53	316	0.059	140	–	–
Liu et al.	2025	1.43	0.18	–	380	–	–	–	–
Zhang et al.	2024	–	–	–	–	-0.082⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	140⁽¹⁾	–	–
Cavallo et al.	2024	1.16	0.55	–	316	0.200	–	–	–
Hunt & Reffert	2023	1.11	0.36	0.53	225	–	–	–	–

(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 1098	93.5	75.82	42.11	0.84	1.02	-3.42	-17.96	0.28

💡 Note: The % column shows the percentage of members that Theia 2901 shares with each listed object.

Visualization

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