Theia 199

0.08 UTI

0.44

C_N

0.3

C_dens

0.75

C_C3

0.25

C_lit

0.2

C_dup

N₅₀ (P>50% members) 44

Stellar density (N₅₀/rad) 1.5 [N/pc²]

C3 classification AB

C_N 0.44 Poorly populated
C_dens 0.3 Loose
C_C3 0.75 High quality
C_lit 0.25 Poorly studied
C_dup 0.2 Likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 199 is a poorly populated, loose object of high 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, young cluster (see Parameters). It was recently reported in the literature.

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

Close Low extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as primordial binary cluster 349 along with UPK_137.

Palma et al. (2025)
Classified as optical pair P572, along with UPK_137.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Theia 199 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–	309.434	54.512	1.222	-3.096	-6.732	-20.545
Hunt & Reffert	2024	309.382	54.688	1.206	-3.098	-6.839	-24.486
Cavallo et al.	2024	309.22	53.817	1.211	–	–	–
Hunt & Reffert	2023	309.382	54.688	1.206	-3.098	-6.839	-24.486

💡 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–	0.83	0.46	1.09	44	0.260	50	–	–
Liu et al.	2025	0.83	0.16	–	62	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	50⁽¹⁾	–	–
Cavallo et al.	2024	0.84	0.68	–	44	0.260	–	–	–
Hunt & Reffert	2023	0.79	0.46	1.09	34	–	–	–	–

(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 444	79.5	309.46	54.4	1.22	-3.11	-6.73	-20.54	0.28

💡 Note: The % column shows the percentage of members that Theia 199 shares with each listed object.

Visualization

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