Theia 2665

0.01 UTI

0.34

C_N

0.15

C_dens

0.25

C_C3

0.03

C_lit

0.06

C_dup

N_m (P>50%) 34

Core radius and density 1.6 [pc], 0.8 [pc^-2]

C3 classification CC

C_N 0.34 Poorly populated
C_dens 0.15 Very loose
C_C3 0.25 Low quality
C_lit 0.03 Rarely studied
C_dup 0.06 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 2665 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a metal-poor, intermediate-age cluster (see Parameters). It was recently reported in the literature.

⚠️ Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Low extinction Metal-poor Intermediate age

Palma et al. (2025)
Classified as optical pair P172, along with Theia_4535.

Cavallo et al. (2024)
Gold sample.

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 2665 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–	335.467	55.908	0.657	-1.579	-1.094	-29.005
Hunt & Reffert	2024	335.446	55.939	0.667	-1.561	-1.117	-25.241
Cavallo et al.	2024	335.474	55.915	0.663	–	–	–
Hunt & Reffert	2023	335.446	55.939	0.667	-1.561	-1.117	-25.241

💡 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–	1.45	0.85	0.23	284	-0.570	123	–	–
Hunt & Reffert	2024	1.45	0.85	0.23	284	–	123⁽¹⁾	–	–
Cavallo et al.	2024	1.28	1.35	–	257	-0.570	–	–	–
Hunt & Reffert	2023	1.45	0.85	0.23	284	–	–	–	–

(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 2458	94.1	335.49	55.91	0.65	-1.58	-1.09	-22.09	0.24

💡 Note: The % column shows the percentage of members that Theia 2665 shares with each listed object.

Visualization

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