Theia 2185

0.01 UTI

0.27

C_N

0.23

C_dens

0.38

C_C3

0.25

C_lit

0.04

C_dup

N₅₀ (P>50% members) 27

Stellar density (N₅₀/rad) 1.1 [N/pc²]

C3 classification CB

C_N 0.27 Poorly populated
C_dens 0.23 Very loose
C_C3 0.38 Low quality
C_lit 0.25 Poorly studied
C_dup 0.04 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 2185 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (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 Near-solar metallicity Intermediate age

Palma et al. (2025)
Part of multiple system G78, along with LP_403 and HSC_2368.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Theia 2185 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–	160.579	-57.147	0.37	-8.992	2.707	-18.528
Hu & Soubiran	2025	160.596	-57.165	–	–	–	–
Hunt & Reffert	2024	160.581	-57.154	0.368	-9.0	2.705	-14.046
Cavallo et al.	2024	160.596	-57.165	0.37	–	–	–
Hunt & Reffert	2023	160.581	-57.154	0.368	-9.0	2.705	-14.046

💡 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–	2.41	0.8	0.95	966	-0.110	67	–	–
Hu & Soubiran	2025	–	–	–	–	-0.290⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	67⁽¹⁾	–	–
Cavallo et al.	2024	2.37	0.95	–	1023	0.070	–	–	–
Hunt & Reffert	2023	2.45	0.65	0.95	908	–	–	–	–

(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 1663	96.3	160.57	-57.14	0.37	-8.99	2.71	-18.53	0.18

💡 Note: The % column shows the percentage of members that Theia 2185 shares with each listed object.

Visualization

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