Theia 6680

0.09 UTI

0.46

C_N

1.0

C_dens

1.0

C_C3

0.03

C_lit

0.17

C_dup

N_m (P>50%) 46

Core radius and density 0.9 [pc], 7.5 [pc^-2]

C3 classification AA

C_N 0.46 Poorly populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.03 Rarely studied
C_dup 0.17 Likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 6680 is a poorly populated, very dense object of very high C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a metal-rich, very young cluster, but with a large variance across recent sources for the absorption and age parameters (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.

Close Moderate extinction Metal-rich Very young

Palma et al. (2025)
Classified as genetic pair P245, along with UPK_599.

Cavallo et al. (2024)
Wood sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.02 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.02 (50th percentile).

Data

🔍 Search references for Theia 6680 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–	209.433	-39.947	1.455	-8.978	-0.705	-0.227
Hunt & Reffert	2024	209.44	-39.964	1.433	-8.962	-0.748	-15.86
Cavallo et al.	2024	209.371	-39.906	1.435	–	–	–
Hunt & Reffert	2023	209.44	-39.964	1.433	-8.962	-0.748	-15.86

💡 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–	0.66	1.3	2.13	11	0.680	61	–	–
Hunt & Reffert	2024	0.66	1.30	2.13	11	–	61⁽¹⁾	–	–
Cavallo et al.	2024	0.87	0.28	–	550	0.680	–	–	–
Hunt & Reffert	2023	0.66	1.30	2.13	11	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Theia 24	82.6	209.43	-39.95	1.46	-8.98	-0.69	2.39	0.48

💡 Note: The % column shows the percentage of members that Theia 6680 shares with each listed object.

Visualization

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