Theia 2819

0.07 UTI

0.52

C_N

1.0

C_dens

0.75

C_C3

0.25

C_lit

0.13

C_dup

N₅₀ (P>50% members) 55

Stellar density (N₅₀/rad) 10.0 [N/pc²]

C3 classification AB

C_N 0.52 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.25 Poorly studied
C_dup 0.13 Likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 2819 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age parameter (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 Young

Liu et al. (2025)
Classified as primordial binary cluster 365 along with UBC_1525.

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P68, along with UBC_1525.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Theia 2819 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–	214.656	-62.659	0.46	-3.896	-2.535	-4.997
Hunt & Reffert	2024	214.683	-62.665	0.457	-3.91	-2.55	–
Cavallo et al.	2024	214.601	-62.643	0.457	–	–	–
Hunt & Reffert	2023	214.683	-62.665	0.457	-3.91	-2.55	–

💡 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–	2.02	1.77	2.23	37	0.490	389	–	–
Liu et al.	2025	4.85	0.69	–	25	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	389⁽¹⁾	–	–
Cavallo et al.	2024	2.02	1.77	–	209	0.490	–	–	–
Hunt & Reffert	2023	2.00	2.07	2.23	37	–	–	–	–

(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 60	87.3	214.67	-62.66	0.46	-3.88	-2.53	-5.0	0.5
LISC 3170	74.5	214.65	-62.66	0.46	-3.91	-2.55	–	0.07

💡 Note: The % column shows the percentage of members that Theia 2819 shares with each listed object.

Visualization

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