UPK 164

0.64 UTI

0.77

C_N

1.0

C_dens

0.75

C_C3

0.35

C_lit

1.0

C_dup

N₅₀ (P>50% members) 147

Stellar density (N₅₀/rad) 16.8 [N/pc²]

C3 classification AB

C_N 0.77 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.35 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 164 is a rich, very dense object of high C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption parameter (see Parameters). It is poorly studied in the literature.

Close Moderate extinction Near-solar metallicity Very young

Liu et al. (2025)
Classified as hyperbolic encounter pair 264 along with IC_1396.

Palma et al. (2025)
Part of multiple system G223, along with IC_1396, HSC_771 and OC_0160.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UPK 164 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–	324.022	58.758	1.071	-1.533	-3.263	-16.45
Hunt & Reffert	2024	324.021	58.772	1.071	-1.537	-3.265	-31.431
Cavallo et al.	2024	324.01	58.776	1.068	–	–	–
Hunt & Reffert	2023	324.021	58.772	1.071	-1.537	-3.265	-31.431
He et al.	2022	323.933	58.791	1.068	-1.537	-3.262	–
Sim et al.	2019	324.26	58.714	–	-1.46	-3.26	–

💡 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–	0.92	1.86	2.22	6	-0.120	303	–	–
Liu et al.	2025	1.62	0.63	–	16	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	303⁽¹⁾	–	–
Cavallo et al.	2024	0.91	1.86	–	4	-0.120	–	–	–
Hunt & Reffert	2023	0.89	1.86	2.22	4	–	–	–	–
He et al.	2022	–	2.35	–	6	–	–	–	–
Sim et al.	2019	0.93	–	–	18	–	–	–	–

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

Visualization

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