Theia 6

0.53 UTI

0.51

C_N

1.0

C_dens

1.0

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 52

Core radius and density 1.2 [pc], 6.8 [pc^-2]

C3 classification AA

C_N 0.51 Moderately populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.06 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

Theia 6 is a moderately populated, very dense object of very high 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, near-solar metallicity, very young cluster (see Parameters). It is rarely studied in the literature.

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

Close Moderate extinction Low mass Near-solar metallicity Very young

Palma et al. (2025)
Classified as optical pair P535, along with HSC_992.

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.30 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.30 (50th percentile).

Data

🔍 Search references for Theia 6 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	10.841	61.968	1.834	3.391	-2.19	-9.524
Hunt & Reffert	2024	10.877	61.975	1.823	3.312	-2.238	-2.089
Cavallo et al.	2024	10.114	62.04	1.838	–	–	–
Hunt & Reffert	2023	10.877	61.975	1.823	3.312	-2.238	-2.089
Kounkel & Covey	2019	10.15	61.596	1.598	–	–	-5.75

💡 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–	0.58	1.075	1.85	5	-0.100	40	–	–
Hunt & Reffert	2024	0.53	0.93	1.85	5	–	40⁽¹⁾	–	–
Cavallo et al.	2024	0.65	1.46	–	5	-0.100	–	–	–
Hunt & Reffert	2023	0.53	0.93	1.85	5	–	–	–	–
Kounkel & Covey	2019	0.63	1.22	–	2	–	–	–	–

(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 1040	94.2	10.84	61.96	1.84	3.36	-2.2	-9.52	0.0

💡 Note: The % column shows the percentage of members that Theia 6 shares with each listed object.

Visualization

ℹ️

1 2