UPK 17

0.79 UTI

0.68

C_N

1.0

C_dens

0.75

C_C3

0.75

C_lit

1.0

C_dup

N₅₀ (P>50% members) 86

Stellar density (N₅₀/rad) 10.6 [N/pc²]

C3 classification AB

C_N 0.68 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.75 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UPK 17 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is well-studied in the literature.

Close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UPK 17 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–	279.745	-15.024	1.49	0.929	-7.933	-23.022
Li et al.	2025	279.741	-15.034	1.479	0.894	-7.856	–
Almeida et al.	2025	279.749	-15.046	–	–	–	–
Alfonso et al.	2024	279.678	-15.019	1.428	0.912	-7.909	–
Hunt & Reffert	2024	279.716	-15.042	1.481	0.96	-7.891	-21.111
Cavallo et al.	2024	279.794	-14.942	1.48	–	–	–
Hunt & Reffert	2023	279.716	-15.042	1.481	0.96	-7.891	-21.111
Almeida et al.	2023	279.745	-15.036	–	–	–	–
He et al.	2022	279.732	-15.065	1.467	0.947	-7.951	–
Tarricq et al.	2022	279.69	-15.025	1.501	0.931	-7.922	–
Dias et al.	2021	279.749	-15.046	1.483	0.904	-7.855	–
Cantat-Gaudin et al.	2020	279.741	-15.034	1.479	0.894	-7.856	–
Cantat-Gaudin & Anders	2020	279.745	-15.024	1.479	0.927	-7.852	–
Sim et al.	2019	279.739	-15.056	–	0.9	-7.92	–

💡 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–	0.66	1.63	1.66	472	0.073	294	0.5	–
Li et al.	2025	0.65	1.23	–	648	0.241	–	–	–
Almeida et al.	2025	0.66	1.73	–	248	–	200	–	–
Alfonso et al.	2024	0.73	1.38	–	409	0.073	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	321⁽¹⁾	–	–
Cavallo et al.	2024	0.68	1.63	–	407	0.350	–	–	–
Hunt & Reffert	2023	0.64	1.68	1.66	251	–	–	–	–
Almeida et al.	2023	0.66	1.72	–	472	-0.060	294⁽¹⁾	0.50	–
He et al.	2022	–	1.60	–	562	–	–	–	–
Tarricq et al.	2022	0.71	–	–	550	–	–	–	–
Dias et al.	2021	0.66	1.73	–	248	0.073	–	–	–
Cantat-Gaudin et al.	2020	0.73	1.38	–	537	–	–	–	–
Cantat-Gaudin & Anders	2020	0.66	–	–	–	–	–	–	–
Sim et al.	2019	0.66	–	–	794	–	–	–	–

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

Visualization

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