Theia 3118

0.09 UTI

0.52

C_N

0.07

C_dens

1.0

C_C3

0.03

C_lit

0.28

C_dup

N_m (P>50%) 53

Core radius and density 5.3 [pc], 0.4 [pc^-2]

C3 classification AA

C_N 0.52 Moderately populated
C_dens 0.07 Very loose
C_C3 1.0 Very high quality
C_lit 0.03 Rarely 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 3118 is a moderately populated, very loose object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young 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 Moderate extinction Near-solar metallicity Young

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.41 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.41 (50th percentile).

Data

🔍 Search references for Theia 3118 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–	239.78	-55.819	0.327	-2.589	-2.942	-7.782
Hunt & Reffert	2024	239.805	-55.87	0.329	-2.617	-2.981	-29.422
Cavallo et al.	2024	239.773	-55.816	0.33	–	–	–
Hunt & Reffert	2023	239.805	-55.87	0.329	-2.617	-2.981	-29.422

💡 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–	2.67	2.2	2.26	54	-0.120	829	–	–
Hunt & Reffert	2024	2.67	2.20	2.26	54	–	829⁽¹⁾	–	–
Cavallo et al.	2024	2.04	2.31	–	148	-0.120	–	–	–
Hunt & Reffert	2023	2.67	2.20	2.26	54	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UFMG 45	71.7	239.71	-55.81	0.33	-2.58	-2.9	-24.95	0.36

💡 Note: The % column shows the percentage of members that Theia 3118 shares with each listed object.

Visualization

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