UPK 109

0.17 UTI

0.0

C_N

0.35

C_dens

0.38

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 21

Core radius and density 1.1 [pc], 1.7 [pc^-2]

C3 classification BC

C_N 0.0 Sparse
C_dens 0.35 Loose
C_C3 0.38 Low quality
C_lit 0.06 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UPK 109 is a sparse, loose object of low 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, young cluster (see Parameters). It is rarely studied in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Close Low extinction Near-solar metallicity Young

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.76 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.76 (50th percentile).

Data

🔍 Search references for UPK 109 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–	308.469	35.251	1.342	-2.331	-5.721	-4.644
Zhang et al.	2024	308.477	35.24	–	–	–	–
Cavallo et al.	2024	308.511	35.361	1.335	–	–	–
Hunt & Reffert	2023	308.477	35.24	1.335	-2.328	-5.706	-3.965
Sim et al.	2019	308.462	35.262	–	-2.37	-5.67	–

💡 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–	0.73	0.445	0.6	45	0.088	–	–	–
Zhang et al.	2024	–	–	–	–	-0.024⁽¹⁾	–	–	–
Cavallo et al.	2024	0.79	0.58	–	33	0.200	–	–	–
Hunt & Reffert	2023	0.73	0.31	0.60	49	–	–	–	–
Sim et al.	2019	0.72	–	–	45	–	–	–	–

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

Visualization

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