UPK 118

0.32 UTI

0.25

C_N

0.15

C_dens

0.62

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 25

Stellar density (N₅₀/rad) 0.7 [N/pc²]

C3 classification AC

C_N 0.25 Poorly populated
C_dens 0.15 Very loose
C_C3 0.62 Intermediate quality
C_lit 0.3 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 118 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a low-mass, near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption parameter (see Parameters). It is poorly studied in the literature.

Close Low extinction Low mass Near-solar metallicity Young

Liu et al. (2025)
Classified as primordial binary cluster 56 along with CWNU_96.

Palma et al. (2025)
Classified as optical pair (not dynamically associated) P380, along with CWNU_96.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UPK 118 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–	314.048	39.892	1.073	-1.653	-3.568	-8.907
Hunt & Reffert	2024	314.114	39.573	1.055	-1.632	-3.547	-12.069
Cavallo et al.	2024	314.009	39.735	1.063	–	–	–
Hunt & Reffert	2023	314.114	39.573	1.055	-1.632	-3.547	-12.069
Sim et al.	2019	314.019	40.048	–	-1.65	-3.5	–

💡 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–	0.95	0.78	1.33	50	0.060	43	–	–
Liu et al.	2025	0.96	0.23	–	58	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	43⁽¹⁾	–	–
Cavallo et al.	2024	0.97	1.28	–	43	0.060	–	–	–
Hunt & Reffert	2023	0.90	0.78	1.33	37	–	–	–	–
Sim et al.	2019	0.94	–	–	794	–	–	–	–

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

Visualization

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