Theia 1841

0.41 UTI

0.74

C_N

1.0

C_dens

0.75

C_C3

0.25

C_lit

0.69

C_dup

N₅₀ (P>50% members) 99

Stellar density (N₅₀/rad) 12.0 [N/pc²]

C3 classification AB

C_N 0.74 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.25 Poorly studied
C_dup 0.69 Likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 1841 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.

Note: This is likely a unique object, which shares a moderate percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close High extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Theia 1841 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–	281.33	-2.6	0.75	2.64	1.117	-12.417
Hu & Soubiran	2025	281.342	-2.586	–	–	–	–
Hunt & Reffert	2024	281.319	-2.584	0.751	2.633	1.091	-23.001
Cavallo et al.	2024	281.342	-2.586	0.752	–	–	–
Hunt & Reffert	2023	281.319	-2.584	0.751	2.633	1.091	-23.001

💡 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–	1.32	3.975	2.7	480	0.105	575	–	–
Hu & Soubiran	2025	–	–	–	–	-0.040⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	575⁽¹⁾	–	–
Cavallo et al.	2024	1.37	4.08	–	501	0.250	–	–	–
Hunt & Reffert	2023	1.27	3.87	2.70	458	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0057	31.3	281.33	-2.59	0.74	2.64	1.13	-12.22	0.36

💡 Note: The % column shows the percentage of members that Theia 1841 shares with each listed object.

Visualization

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