Theia 2999

0.07 UTI

0.0

C_N

0.09

C_dens

0.38

C_C3

0.0

C_lit

0.76

C_dup

N₅₀ (P>50% members) 24

Stellar density (N₅₀/rad) 0.5 [N/pc²]

C3 classification BC

C_N 0.0 Sparse
C_dens 0.09 Very loose
C_C3 0.38 Low quality
C_lit 0.0 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 2999 is a sparse, very loose object of low C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane. It is catalogued as a near-solar metallicity 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.

Near-solar metallicity

Data

🔍 Search references for Theia 2999 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–	89.053	11.601	0.601	-0.911	-2.882	8.94
Zhang et al.	2024	89.05	11.608	–	–	–	–
Hunt & Reffert	2024	89.05	11.608	0.605	-0.88	-2.875	15.225

💡 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–	–	–	–	–	-0.176	60	–	–
Zhang et al.	2024	–	–	–	–	-0.176⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	60⁽¹⁾	–	–

(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 2387	24.0	89.32	10.99	0.58	-0.94	-2.88	30.3	0.12

💡 Note: The % column shows the percentage of members that Theia 2999 shares with each listed object.

Visualization

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