Theia 267

0.21 UTI

0.54

C_N

0.07

C_dens

0.38

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 58

Core radius and density 2.3 [pc], 0.4 [pc^-2]

C3 classification CB

C_N 0.54 Moderately populated
C_dens 0.07 Very loose
C_C3 0.38 Low quality
C_lit 0.03 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 267 is a moderately populated, very loose object of low C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a low-mass, intermediate-age cluster (see Parameters). It is rarely studied in the literature.

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

⚠️ 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 Low extinction Low mass Intermediate age

Palma et al. (2025)
Part of multiple system G241, along with HSC_1743 and Theia_361.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for Theia 267 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–	105.897	-7.948	1.412	-3.301	2.48	43.595
Hunt & Reffert	2024	105.867	-8.017	1.424	-3.301	2.479	44.314
Hunt & Reffert	2023	105.867	-8.017	1.424	-3.301	2.479	44.314
Kounkel & Covey	2019	104.901	-8.899	1.351	–	–	20.508

💡 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	0.17	0.52	223	–	46	–	–
Hunt & Reffert	2024	0.66	0.17	0.52	223	–	46⁽¹⁾	–	–
Hunt & Reffert	2023	0.66	0.17	0.52	223	–	–	–	–
Kounkel & Covey	2019	0.74	0.33	–	89	–	–	–	–

(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 3723	41.4	105.92	-7.46	1.41	-3.38	2.42	44.83	0.0

💡 Note: The % column shows the percentage of members that Theia 267 shares with each listed object.

Visualization

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