Theia 954

0.05 UTI

0.0

C_N

0.06

C_dens

0.12

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 22

Core radius and density 1.1 [pc], 0.3 [pc^-2]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.06 Very loose
C_C3 0.12 Very 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

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Theia 954 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young 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 Young

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Data

🔍 Search references for Theia 954 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–	190.202	-61.584	1.757	-10.037	-3.617	-12.405
Cavallo et al.	2024	188.641	-61.676	1.878	–	–	–
Hunt & Reffert	2023	190.541	-61.655	1.867	-10.102	-3.581	-11.898
Kounkel & Covey	2019	193.4	-62.534	1.662	–	–	-11.281

💡 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–	0.53	0.69	0.4	63	0.200	–	–	–
Cavallo et al.	2024	0.53	0.76	–	63	0.200	–	–	–
Hunt & Reffert	2023	0.52	0.60	0.40	56	–	–	–	–
Kounkel & Covey	2019	0.60	0.69	–	523	–	–	–	–

Visualization

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