UPK 72

(OCSN 294)

0.61 UTI

0.72

C_N

0.71

C_dens

1.0

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 94

Stellar density (N₅₀/rad) 3.6 [N/pc²]

C3 classification AA

C_N 0.72 Moderately populated
C_dens 0.71 Moderately dense
C_C3 1.0 Very high 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 72 is a moderately populated, moderately dense object of very high C3 quality. Its parallax locates it at a very close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is poorly studied in the literature.

Very close Low extinction Near-solar metallicity Young

Palma et al. (2025)
Classified as optical pair (not dynamically associated) P158, along with HSC_475.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as a moving group.

Data

🔍 Search references for UPK 72 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–	284.877	26.793	2.246	-0.622	-4.47	-16.224
Zhang et al.	2024	284.988	27.293	–	–	–	–
Cavallo et al.	2024	285.163	26.118	2.207	–	–	–
Hunt & Reffert	2023	284.988	27.293	2.209	-0.461	-4.554	-15.192
Qin et al.	2023	285.19	26.74	2.19	-0.6	-4.6	-16.69
Sim et al.	2019	284.687	26.344	–	-0.68	-4.41	–

💡 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–	0.46	0.76	0.65	69	0.255	–	–	–
Zhang et al.	2024	–	–	–	–	0.210⁽¹⁾	–	–	–
Cavallo et al.	2024	0.47	0.76	–	30	0.300	–	–	–
Hunt & Reffert	2023	0.44	0.38	0.65	75	–	–	–	–
Qin et al.	2023	0.68	1.12	–	316	–	–	–	–
Sim et al.	2019	0.45	–	–	63	–	–	–	–

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

Visualization

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