Theia 366

0.35 UTI

0.64

C_N

0.73

C_dens

0.75

C_C3

0.25

C_lit

0.67

C_dup

C3 classification AB

Number of members (P>50%) 78

Radius (P>50% members) 16.5 [arcmin]

C_N 0.64 Moderately populated
C_dens 0.73 Moderately dense
C_C3 0.75 High quality
C_lit 0.25 Poorly studied
C_dup 0.67 Likely unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Theia 366 is a moderately populated, moderately dense object of high C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

Note: This is likely a unique object, which shares a moderate percentage of members with at least one previously reported entry. See table with shared members information.

Close Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Theia 366 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	–	107.596	-18.651	1.04	-3.593	0.401	27.342
Hunt & Reffert	2024	107.642	-18.66	1.04	-3.588	0.404	25.023
Cavallo et al.	2024	107.59	-18.638	1.039	–	–	–
Hunt & Reffert	2023	107.642	-18.66	1.04	-3.588	0.404	25.023
He et al.	2022	107.678	-18.528	1.032	-3.591	0.396	–

💡 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]	Bfr	BSS
Hunt & Reffert	2024	–	–	–	–	–	150*	–	–
Cavallo et al.	2024	0.96	0.34	–	275	0.330	–	–	–
Hunt & Reffert	2023	0.91	0.11	0.49	168	–	–	–	–
He et al.	2022	–	0.40	–	56	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0393	33.3	107.63	-18.61	1.04	-3.61	0.38	28.11	0.22

💡 Note: The % column shows the percentage of members that Theia 366 shares with each listed object.

Visualization

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