Theia 5

0.03 UTI

0.36

C_N

1.0

C_dens

1.0

C_C3

0.06

C_lit

0.06

C_dup

N_m (P>50%) 36

Core radius and density 0.2 [pc], 111 [pc^-2]

C3 classification AA

C_N 0.36 Poorly populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.06 Rarely studied
C_dup 0.06 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Theia 5 is a poorly populated, very dense object of very high C3 quality. Its parallax locates it at a very close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, near-solar metallicity, very young cluster (see Parameters). It is rarely studied in the literature.

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

Very close Moderate extinction Low mass Near-solar metallicity Very young

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.49 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.49 (50th percentile).

Data

🔍 Search references for Theia 5 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–	315.427	68.148	2.918	7.488	-1.403	-21.365
Hunt & Reffert	2024	315.432	68.153	2.912	7.906	-1.131	-20.132
Cavallo et al.	2024	318.327	68.853	2.913	–	–	–
Hunt & Reffert	2023	315.432	68.153	2.912	7.906	-1.131	-20.132
Kounkel & Covey	2019	318.091	68.885	2.499	–	–	-8.737

💡 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–	0.365	1.025	1.8	9	0.300	43	–	–
Hunt & Reffert	2024	0.33	0.81	1.80	9	–	43⁽¹⁾	–	–
Cavallo et al.	2024	0.40	1.94	–	11	0.300	–	–	–
Hunt & Reffert	2023	0.33	0.81	1.80	9	–	–	–	–
Kounkel & Covey	2019	0.40	1.24	–	2	–	–	–	–

(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 34	100.0	315.44	68.16	2.91	7.44	-1.39	-21.36	0.11
NGC 7023	94.4	316.35	68.5	2.91	7.83	-1.1	-13.98	0.38

💡 Note: The % column shows the percentage of members that Theia 5 shares with each listed object.

Visualization

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