Theia 4535

0.09 UTI

0.6

C_N

0.92

C_dens

0.62

C_C3

0.25

C_lit

0.17

C_dup

N₅₀ (P>50% members) 71

Stellar density (N₅₀/rad) 4.6 [N/pc²]

C3 classification AC

C_N 0.6 Moderately populated
C_dens 0.92 Very dense
C_C3 0.62 Intermediate quality
C_lit 0.25 Poorly 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 4535 is a moderately populated, very dense object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near 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 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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Theia 4535 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–	335.544	54.552	0.657	1.678	-2.285	-12.308
Hu & Soubiran	2025	335.447	54.515	–	–	–	–
Hunt & Reffert	2024	335.52	54.563	0.638	1.67	-2.29	-11.303
Cavallo et al.	2024	335.447	54.515	0.653	–	–	–
Hunt & Reffert	2023	335.52	54.563	0.638	1.67	-2.29	-11.303

💡 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–	1.555	0.94	0.89	456	0.085	283	–	–
Hu & Soubiran	2025	–	–	–	–	-0.080⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	283⁽¹⁾	–	–
Cavallo et al.	2024	1.67	1.09	–	525	0.250	–	–	–
Hunt & Reffert	2023	1.44	0.79	0.89	388	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
HXHWL 23	83.1	335.54	54.56	0.66	1.68	-2.29	-12.31	0.46
CWWDL 13357	59.2	335.56	54.56	0.66	1.69	-2.31	-9.35	0.01

💡 Note: The % column shows the percentage of members that Theia 4535 shares with each listed object.

Visualization

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