Theia 2730

0.19 UTI

0.0

C_N

0.18

C_dens

1.0

C_C3

0.03

C_lit

0.76

C_dup

N_m (P>50%) 24

Core radius and density 1.5 [pc], 0.9 [pc^-2]

C3 classification AA

C_N 0.0 Sparse
C_dens 0.18 Very loose
C_C3 1.0 Very high quality
C_lit 0.03 Rarely studied
C_dup 0.76 Very likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 2730 is a sparse, very loose object of very high C3 quality. Its parallax locates it at a moderate distance, below 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 very likely a unique object, which shares a small percentage of members with at least one previously reported entry. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.76) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Distant High extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.03 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.03 (50th percentile).

Data

🔍 Search references for Theia 2730 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–	242.095	-53.483	0.23	-3.334	-3.701	-51.716
Hunt & Reffert	2024	242.091	-53.503	0.236	-3.342	-3.699	-17.403
Cavallo et al.	2024	242.074	-53.476	0.236	–	–	–
Hunt & Reffert	2023	242.091	-53.503	0.236	-3.342	-3.699	-17.403

💡 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–	3.89	4.19	2.7	132	-0.310	832	–	–
Hunt & Reffert	2024	3.89	4.19	2.70	132	–	832⁽¹⁾	–	–
Cavallo et al.	2024	4.31	4.92	–	36	-0.310	–	–	–
Hunt & Reffert	2023	3.89	4.19	2.70	132	–	–	–	–

(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 2741	24.0	242.0	-53.5	0.32	-3.32	-3.75	-30.39	0.06

💡 Note: The % column shows the percentage of members that Theia 2730 shares with each listed object.

Visualization

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