Theia 1976

0.00 UTI

0.63

C_N

1.0

C_dens

1.0

C_C3

0.25

C_lit

0.0

C_dup

N₅₀ (P>50% members) 76

Stellar density (N₅₀/rad) 10.5 [N/pc²]

C3 classification AA

C_N 0.63 Moderately populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.25 Poorly studied
C_dup 0.0 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 1976 is a moderately populated, very dense 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, 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 Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Theia 1976 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–	278.32	-13.062	0.39	-0.926	-0.246	1.269
Hu & Soubiran	2025	278.305	-13.062	–	–	–	–
Hunt & Reffert	2024	278.32	-13.053	0.388	-0.915	-0.258	-4.098
Cavallo et al.	2024	278.305	-13.062	0.389	–	–	–
Hunt & Reffert	2023	278.32	-13.053	0.388	-0.915	-0.258	-4.098

💡 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–	2.005	2.535	1.79	575	-0.320	819	–	–
Hu & Soubiran	2025	–	–	–	–	-0.220⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	819⁽¹⁾	–	–
Cavallo et al.	2024	1.71	2.62	–	794	-0.420	–	–	–
Hunt & Reffert	2023	2.30	2.45	1.79	356	–	–	–	–

(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 397	100.0	278.32	-13.06	0.39	-0.93	-0.25	1.27	0.16
UBC 1022	77.6	278.32	-13.06	0.39	-0.93	-0.24	1.27	0.51

💡 Note: The % column shows the percentage of members that Theia 1976 shares with each listed object.

Visualization

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