Theia 729

0.11 UTI

0.0

C_N

0.13

C_dens

0.38

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 24

Core radius and density 1.4 [pc], 0.7 [pc^-2]

C3 classification CB

C_N 0.0 Sparse
C_dens 0.13 Very loose
C_C3 0.38 Low quality
C_lit 0.03 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

Theia 729 is a sparse, very loose object of low C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Close Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.86 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.86 (50th percentile).

Data

🔍 Search references for Theia 729 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	53.158	80.868	1.998	5.986	-2.232	-7.37
Cavallo et al.	2024	52.092	80.826	2.01	–	–	–
Hunt & Reffert	2023	53.335	80.769	1.986	5.939	-2.352	-10.239
Kounkel & Covey	2019	52.969	79.315	1.901	–	–	-10.49

💡 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–	0.51	0.43	0.96	147	0.080	–	–	–
Cavallo et al.	2024	0.51	0.81	–	59	0.080	–	–	–
Hunt & Reffert	2023	0.48	0.24	0.96	147	–	–	–	–
Kounkel & Covey	2019	0.53	0.43	–	329	–	–	–	–

Visualization

ℹ️

1 2