Theia 659

0.16 UTI

0.0

C_N

0.41

C_dens

0.38

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 21

Stellar density (N₅₀/rad) 2.0 [N/pc²]

C3 classification BC

C_N 0.0 Sparse
C_dens 0.41 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 659 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 low-mass, metal-poor, young cluster (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 Low mass Metal-poor Young

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Theia 659 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–	253.503	-42.594	1.477	-0.322	-7.613	-30.598
Hunt & Reffert	2024	253.376	-42.589	1.47	-0.296	-7.535	-32.431
Cavallo et al.	2024	253.652	-42.455	1.469	–	–	–
Hunt & Reffert	2023	253.376	-42.589	1.47	-0.296	-7.535	-32.431

💡 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–	0.63	1.155	1.12	96	-0.660	49	–	–
Hunt & Reffert	2024	–	–	–	–	–	49⁽¹⁾	–	–
Cavallo et al.	2024	0.62	1.46	–	58	-0.660	–	–	–
Hunt & Reffert	2023	0.64	0.85	1.12	133	–	–	–	–

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

Visualization

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