Theia 4228

0.07 UTI

0.55

C_N

0.21

C_dens

0.38

C_C3

0.03

C_lit

0.28

C_dup

N_m (P>50%) 60

Core radius and density 0.8 [pc], 1.1 [pc^-2]

C3 classification CB

C_N 0.55 Moderately populated
C_dens 0.21 Very loose
C_C3 0.38 Low quality
C_lit 0.03 Rarely studied
C_dup 0.28 Possibly duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 4228 is a moderately populated, very loose object of low C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by high extinction. It is catalogued as a metal-rich, young cluster (see Parameters). It was recently reported in the literature.

⚠️ Warning: This is possibly a duplicate object, which shares a significant percentage of members with at least one previously reported entry. See table with shared members information.

Close High extinction Metal-rich Young

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.92 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.92 (50th percentile).

Data

🔍 Search references for Theia 4228 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–	17.455	66.184	0.964	-0.241	0.766	-19.369
Hunt & Reffert	2024	17.226	66.201	0.951	-0.209	0.759	-1.176
Cavallo et al.	2024	17.874	66.075	0.954	–	–	–
Hunt & Reffert	2023	17.226	66.201	0.951	-0.209	0.759	-1.176

💡 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–	0.99	3.08	2.35	27	0.500	278	–	–
Hunt & Reffert	2024	0.99	3.08	2.35	27	–	278⁽¹⁾	–	–
Cavallo et al.	2024	1.24	3.15	–	39	0.500	–	–	–
Hunt & Reffert	2023	0.99	3.08	2.35	27	–	–	–	–

(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 1059	71.7	17.44	66.18	0.96	-0.24	0.77	-21.63	0.19
CWWDL 14456	65.0	17.69	66.07	0.96	-0.23	0.76	-19.37	0.03

💡 Note: The % column shows the percentage of members that Theia 4228 shares with each listed object.

Visualization

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