Theia 497

0.47 UTI

0.34

C_N

1.0

C_dens

0.5

C_C3

0.25

C_lit

1.0

C_dup

C3 classification BB

Number of members (P>50%) 34

Radius (P>50% members) 2.3 [arcmin]

C_N 0.34 Poorly populated
C_dens 1.0 Very dense
C_C3 0.5 Intermediate quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Theia 497 is a poorly populated, very dense object of intermediate C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by moderate 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.

(*): The parallax distance estimate (~3.62 kpc) differs significantly from the median photometric distance (~2.69 kpc).

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Silver sample.

Data

🔍 Search references for Theia 497 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	–	87.675	27.122	0.276	0.296	-2.142	23.557
Zhang et al.	2024	87.667	27.116	–	–	–	–
Hunt & Reffert	2024	87.667	27.116	0.332	0.287	-2.284	18.932
Cavallo et al.	2024	87.502	27.341	0.336	–	–	–
Hunt & Reffert	2023	87.667	27.116	0.332	0.287	-2.284	18.932

💡 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]	Bfr	BSS
Zhang et al.	2024	–	–	–	–	-0.048*	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	162*	–	–
Cavallo et al.	2024	2.88	2.70	–	372	0.510	–	–	–
Hunt & Reffert	2023	2.49	2.69	2.49	438	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization

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