Theia 4212

0.02 UTI

0.39

C_N

0.31

C_dens

0.5

C_C3

0.06

C_lit

0.08

C_dup

N_m (P>50%) 39

Core radius and density 1.6 [pc], 1.6 [pc^-2]

C3 classification BB

C_N 0.39 Poorly populated
C_dens 0.31 Loose
C_C3 0.5 Intermediate quality
C_lit 0.06 Rarely studied
C_dup 0.08 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 4212 is a poorly populated, loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It was recently reported in the literature.

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

Relatively close Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Data

🔍 Search references for Theia 4212 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–	94.473	9.68	0.302	-1.015	-0.066	43.727
Zhang et al.	2024	94.47	9.68	–	–	–	–
Hunt & Reffert	2024	94.47	9.68	0.3	-0.991	-0.059	43.733
Cavallo et al.	2024	94.532	9.697	0.302	–	–	–
Hunt & Reffert	2023	94.47	9.68	0.3	-0.991	-0.059	43.733

💡 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–	2.83	0.49	1.83	430	-0.053	189	–	–
Zhang et al.	2024	–	–	–	–	-0.326⁽¹⁾	–	–	–
Hunt & Reffert	2024	2.83	0.49	1.83	430	–	189⁽¹⁾	–	–
Cavallo et al.	2024	3.16	0.90	–	427	0.220	–	–	–
Hunt & Reffert	2023	2.83	0.49	1.83	431	–	–	–	–

(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 1550	92.3	94.47	9.68	0.3	-1.01	-0.05	43.73	0.23
CWWDL 245	84.6	94.47	9.68	0.31	-1.02	-0.05	43.73	0.01

💡 Note: The % column shows the percentage of members that Theia 4212 shares with each listed object.

Visualization

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