UPK 46

0.43 UTI

0.5

C_N

0.25

C_dens

0.75

C_C3

0.32

C_lit

1.0

C_dup

N_m (P>50%) 51

Core radius and density 1.4 [pc], 1.3 [pc^-2]

C3 classification AB

C_N 0.5 Moderately populated
C_dens 0.25 Loose
C_C3 0.75 High quality
C_lit 0.32 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UPK 46 is a moderately populated, loose object of high C3 quality. Its parallax locates it at a close distance, below 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 poorly studied in the literature.

Close Low extinction Near-solar metallicity Intermediate age

Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: good fit.

Cavallo et al. (2024)
Gold sample.

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

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

Data

🔍 Search references for UPK 46 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–	294.612	-1.367	1.458	0.127	-8.562	0.46
Li et al.	2025	294.707	-1.363	1.47	0.094	-8.631	–
Almeida et al.	2025	294.709	-1.356	–	–	–	–
Alfonso et al.	2024	294.542	-1.437	1.416	0.136	-8.57	–
Hunt & Reffert	2024	294.626	-1.312	1.457	0.141	-8.612	0.718
Cavallo et al.	2024	294.441	-1.72	1.459	–	–	–
Hunt & Reffert	2023	294.626	-1.312	1.457	0.141	-8.612	0.718
Almeida et al.	2023	294.718	-1.33	–	–	–	–
Tarricq et al.	2022	294.531	-1.411	1.465	0.119	-8.627	–
Dias et al.	2021	294.709	-1.356	1.473	0.063	-8.726	–
Cantat-Gaudin et al.	2020	294.707	-1.363	1.47	0.094	-8.631	–
Cantat-Gaudin & Anders	2020	294.7	-1.365	1.473	0.071	-8.729	–
Sim et al.	2019	294.622	-1.358	–	0.11	-8.6	–

💡 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–	0.67	0.8	0.91	139	0.069	105	0.64	–
Li et al.	2025	0.71	1.02	–	88	-0.253	–	–	–
Almeida et al.	2025	0.67	0.98	–	139	–	105	–	–
Alfonso et al.	2024	0.69	0.64	–	208	0.069	–	–	–
Hunt & Reffert	2024	0.64	0.80	0.91	104	–	50⁽¹⁾	–	–
Cavallo et al.	2024	0.65	0.77	–	251	0.090	–	–	–
Hunt & Reffert	2023	0.64	0.80	0.91	104	–	–	–	–
Almeida et al.	2023	0.67	0.79	–	292	0.025	144⁽¹⁾	0.64	–
Tarricq et al.	2022	0.68	–	–	162	–	–	–	–
Dias et al.	2021	0.67	0.98	–	139	0.069	–	–	–
Cantat-Gaudin et al.	2020	0.69	0.64	–	155	–	–	–	–
Cantat-Gaudin & Anders	2020	0.67	–	–	–	–	–	–	–
Sim et al.	2019	0.68	–	–	79	–	–	–	–

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

Visualization

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