UPK 131

0.73 UTI

0.52

C_N

1.0

C_dens

0.75

C_C3

0.7

C_lit

1.0

C_dup

N₅₀ (P>50% members) 53

Stellar density (N₅₀/rad) 5.1 [N/pc²]

C3 classification AB

C_N 0.52 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.7 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UPK 131 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a close 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 is moderately studied in the literature.

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

Close Moderate extinction Near-solar metallicity Intermediate age

Palma et al. (2025)
Classified as optical pair P518, along with HSC_687.

Cavallo et al. (2024)
Gold sample.

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

Data

🔍 Search references for UPK 131 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–	315.508	45.422	1.016	2.832	-1.121	-7.468
Li et al.	2025	315.517	45.391	1.013	2.833	-1.08	–
Almeida et al.	2025	315.489	45.388	–	–	–	–
Alfonso et al.	2024	315.46	45.404	0.988	2.799	-1.192	–
Zhang et al.	2024	315.477	45.448	–	–	–	–
Hunt & Reffert	2024	315.477	45.448	1.015	2.723	-1.249	-13.52
Cavallo et al.	2024	315.542	45.319	1.019	–	–	–
Hunt & Reffert	2023	315.477	45.448	1.015	2.723	-1.249	-13.52
He et al.	2022	315.57	45.385	1.011	2.829	-1.133	–
Tarricq et al.	2022	315.448	45.407	0.999	2.837	-1.124	–
Dias et al.	2021	315.489	45.388	1.018	2.793	-1.129	–
Cantat-Gaudin et al.	2020	315.517	45.391	1.013	2.833	-1.08	–
Cantat-Gaudin & Anders	2020	315.499	45.375	1.014	2.784	-1.138	–
Sim et al.	2019	315.501	45.37	–	2.83	-1.09	–

💡 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–	0.96	1.835	1.97	463	0.011	188	–	–
Li et al.	2025	1.06	2.11	–	465	0.054	–	–	–
Almeida et al.	2025	0.96	1.84	–	461	–	162	–	–
Alfonso et al.	2024	0.96	1.11	–	716	0.011	–	–	–
Zhang et al.	2024	–	–	–	–	-0.014⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	213⁽¹⁾	–	–
Cavallo et al.	2024	0.99	1.83	–	447	0.440	–	–	–
Hunt & Reffert	2023	0.94	1.78	1.97	348	–	–	–	–
He et al.	2022	–	2.00	–	447	–	–	–	–
Tarricq et al.	2022	0.94	–	–	562	–	–	–	–
Dias et al.	2021	0.96	1.84	–	461	0.011	–	–	–
Cantat-Gaudin et al.	2020	0.96	1.11	–	537	–	–	–	–
Cantat-Gaudin & Anders	2020	0.96	–	–	–	–	–	–	–
Sim et al.	2019	0.98	–	–	562	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 14408	54.7	315.45	45.38	1.01	2.82	-1.13	-8.46	0.02

💡 Note: The % column shows the percentage of members that UPK 131 shares with each listed object.

Visualization

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