Theia 1742

0.41 UTI

0.52

C_N

0.54

C_dens

0.62

C_C3

0.25

C_lit

0.94

C_dup

N₅₀ (P>50% members) 54

Stellar density (N₅₀/rad) 2.7 [N/pc²]

C3 classification AC

C_N 0.52 Moderately populated
C_dens 0.54 Moderately dense
C_C3 0.62 Intermediate quality
C_lit 0.25 Poorly studied
C_dup 0.94 Very likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

Theia 1742 is a moderately populated, moderately dense object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the absorption parameter (see Parameters). It was recently reported in the literature.

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

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Liu et al. (2025)
Classified as primordial binary cluster 221 along with HSC_2145, and as primordial binary cluster 386 along with UBC_1621, and of multiple system 63 along with UBC_1621 and HSC_2145.

Palma et al. (2025)
Part of multiple system G139, along with HSC_2145 and UBC_1621.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Theia 1742 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	133.108	-47.98	0.595	-6.905	5.16	26.623
Liu et al.	2025	133.11	-47.93	0.59	-6.83	5.15	33.3
Hunt & Reffert	2024	133.115	-47.933	0.594	-6.827	5.154	33.303
Cavallo et al.	2024	132.819	-47.887	0.598	–	–	–
Hunt & Reffert	2023	133.115	-47.933	0.594	-6.827	5.154	33.303

💡 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–	1.78	1.32	2.54	126	0.340	247	–	–
Liu et al.	2025	1.91	0.37	–	89	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	247⁽¹⁾	–	–
Cavallo et al.	2024	1.78	1.56	–	178	0.340	–	–	–
Hunt & Reffert	2023	1.60	1.32	2.54	126	–	–	–	–

(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 2013	5.6	133.75	-48.24	0.62	-7.01	5.12	72.4	0.13

💡 Note: The % column shows the percentage of members that Theia 1742 shares with each listed object.

Visualization

ℹ️

1 2