Theia 383

0.34 UTI

0.52

C_N

0.42

C_dens

0.75

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 54

Stellar density (N₅₀/rad) 2.1 [N/pc²]

C3 classification AB

C_N 0.52 Moderately populated
C_dens 0.42 Loose
C_C3 0.75 High quality
C_lit 0.0 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 383 is a moderately populated, loose object of high C3 quality. Its parallax locates it at a very close distance, above 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 is rarely studied in the literature.

Note: This object shares a significant percentage of members with a later reported entry. See table with shared members information.

Very close Low extinction Near-solar metallicity Intermediate age

Palma et al. (2025)
Part of multiple system G127, along with Theia_172 and HSC_1707.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.98 (50th percentile).

Data

🔍 Search references for Theia 383 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–	113.243	0.005	2.137	-1.757	-0.222	1.54
Zhang et al.	2024	113.165	0.323	–	–	–	–
Cavallo et al.	2024	113.239	-0.461	2.11	–	–	–
Hunt & Reffert	2023	113.165	0.323	2.103	-1.736	-0.086	0.533
He et al.	2022	113.19	0.191	2.147	-1.761	-0.3	–
Kounkel & Covey	2019	113.476	-1.0	2.162	–	–	-8.821

💡 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–	0.46	0.285	0.53	179	0.138	–	–	–
Zhang et al.	2024	–	–	–	–	-0.095⁽¹⁾	–	–	–
Cavallo et al.	2024	0.50	0.30	–	219	0.370	–	–	–
Hunt & Reffert	2023	0.45	0.11	0.53	139	–	–	–	–
He et al.	2022	–	0.40	–	282	–	–	–	–
Kounkel & Covey	2019	0.46	0.27	–	136	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OCSN 73	74.1	113.23	0.14	2.14	-1.76	-0.29	1.43	0.01

💡 Note: The % column shows the percentage of members that Theia 383 shares with each listed object.

Visualization

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