Theia 4310

0.00 UTI

0.33

C_N

1.0

C_dens

0.5

C_C3

0.25

C_lit

0.0

C_dup

C3 classification BB

Number of members (P>50%) 33

Radius (P>50% members) 6.1 [arcmin]

C_N 0.33 Poorly populated
C_dens 1.0 Very dense
C_C3 0.5 Intermediate quality
C_lit 0.25 Poorly studied
C_dup 0.0 Very likely duplicate

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

Overview

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Theia 4310 is a poorly populated, very dense object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (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.

Data

🔍 Search references for Theia 4310 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	–	0.547	63.549	0.891	-2.607	-1.417	-43.299
Hu & Soubiran	2025	0.489	63.575	–	–	–	–
Hunt & Reffert	2024	0.425	63.533	0.89	-2.576	-1.419	-45.674
Cavallo et al.	2024	0.489	63.576	0.892	–	–	–
Hunt & Reffert	2023	0.425	63.533	0.89	-2.576	-1.419	-45.674

💡 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	–	–	–	–	-0.120*	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	136*	–	–
Cavallo et al.	2024	1.09	1.36	–	794	0.310	–	–	–
Hunt & Reffert	2023	1.07	1.30	0.95	441	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 181	100.0	0.59	63.57	0.88	-2.6	-1.41	-43.1	0.57

💡 Note: The % column shows the percentage of members that Theia 4310 shares with each listed object.

Visualization

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