UPK 136

0.58 UTI

0.58

C_N

0.27

C_dens

0.75

C_C3

0.65

C_lit

1.0

C_dup

N₅₀ (P>50% members) 66

Stellar density (N₅₀/rad) 1.3 [N/pc²]

C3 classification BA

C_N 0.58 Moderately populated
C_dens 0.27 Loose
C_C3 0.75 High quality
C_lit 0.65 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 136 is a moderately populated, loose object of high C3 quality. Its parallax locates it at a close distance, near 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 age and metallicity parameters (see Parameters). It is moderately studied in the literature.

Close Low extinction Near-solar metallicity Intermediate age

Malhotra et al. (2026)
Lowest/Highest stellar mass in the catalogue with a mass-ratio estimate: 0.37/4.2 Msun

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 170 along with HSC_689.

Palma et al. (2025)
Part of multiple system G190, along with HSC_689, HSC_717 and HSC_699.

Cavallo et al. (2024)
Gold sample.

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

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.94 (50th percentile).

Data

🔍 Search references for UPK 136 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–	322.786	43.476	1.549	0.013	-0.627	-8.332
Malhotra et al.	2026	322.679	43.328	–	–	–	–
Li et al.	2025	322.841	43.441	1.533	0.012	-0.591	–
Almeida et al.	2025	322.741	43.466	–	–	–	–
Alfonso et al.	2024	322.611	43.356	1.499	-0.03	-0.617	–
Zhang et al.	2024	322.609	43.417	–	–	–	–
Hunt & Reffert	2024	322.609	43.417	1.564	-0.001	-0.666	-5.349
Cavallo et al.	2024	322.712	43.395	1.557	–	–	–
Hunt & Reffert	2023	322.609	43.417	1.564	-0.001	-0.666	-5.349
Tarricq et al.	2022	322.75	43.491	1.522	0.041	-0.656	–
Dias et al.	2021	322.741	43.466	1.532	0.034	-0.592	-2.866
Cantat-Gaudin et al.	2020	322.841	43.441	1.533	0.012	-0.591	–
Cantat-Gaudin & Anders	2020	322.828	43.491	1.52	0.022	-0.587	–
Sim et al.	2019	322.602	43.339	–	-0.03	-0.6	–

💡 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–	0.64	0.31	0.59	125	-0.061	96	–	–
Malhotra et al.	2026	0.64	0.27	–	87	-0.047	–	–	–
Liu et al.	2025	0.74	0.10	–	417	–	–	–	–
Li et al.	2025	0.67	0.42	–	125	-0.035	–	–	–
Almeida et al.	2025	0.65	0.43	–	143	–	150	–	–
Alfonso et al.	2024	0.63	0.31	–	95	-0.075	–	–	–
Zhang et al.	2024	–	–	–	–	-0.205⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	42⁽¹⁾	–	–
Cavallo et al.	2024	0.63	0.41	–	245	0.110	–	–	–
Hunt & Reffert	2023	0.62	0.20	0.59	136	–	–	–	–
Tarricq et al.	2022	0.61	–	–	123	–	–	–	–
Dias et al.	2021	0.65	0.43	–	143	-0.075	–	–	–
Cantat-Gaudin et al.	2020	0.63	0.31	–	115	–	–	–	–
Cantat-Gaudin & Anders	2020	0.65	–	–	–	–	–	–	–
Sim et al.	2019	0.64	–	–	71	–	–	–	–

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

Visualization

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