Theia 980

0.15 UTI

0.0

C_N

0.37

C_dens

0.38

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 23

Stellar density (N₅₀/rad) 1.8 [N/pc²]

C3 classification CB

C_N 0.0 Sparse
C_dens 0.37 Loose
C_C3 0.38 Low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 980 is a sparse, loose object of low C3 quality. Its parallax locates it at a 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 age parameter (see Parameters). It was recently reported in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Theia 980 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–	187.797	-65.147	1.309	-6.42	-2.693	19.918
Hunt & Reffert	2024	188.223	-65.194	1.303	-6.435	-2.681	10.156
Cavallo et al.	2024	187.26	-65.135	1.303	–	–	–
Hunt & Reffert	2023	188.223	-65.194	1.303	-6.435	-2.681	10.156

💡 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–	0.765	1.11	2.4	246	0.480	72	–	–
Hunt & Reffert	2024	–	–	–	–	–	72⁽¹⁾	–	–
Cavallo et al.	2024	0.80	1.10	–	389	0.480	–	–	–
Hunt & Reffert	2023	0.73	1.12	2.40	103	–	–	–	–

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

Visualization

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