UPK 617

0.82 UTI

0.7

C_N

1.0

C_dens

1.0

C_C3

0.7

C_lit

1.0

C_dup

N₅₀ (P>50% members) 89

Stellar density (N₅₀/rad) 18.2 [N/pc²]

C3 classification AA

C_N 0.7 Moderately populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.7 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UPK 617 is a moderately populated, very dense object of very high 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, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is moderately studied in the literature.

Close Low extinction Near-solar metallicity Young

Cavallo et al. (2024)
Gold sample.

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

Data

🔍 Search references for UPK 617 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–	234.815	-55.394	1.367	-2.799	-5.284	-32.808
Li et al.	2025	234.809	-55.394	1.36	-2.736	-5.314	–
Almeida et al.	2025	234.778	-55.39	–	–	–	–
Alfonso et al.	2024	234.816	-55.383	1.327	-2.797	-5.289	–
Hunt & Reffert	2024	234.832	-55.373	1.368	-2.807	-5.276	-32.154
Cavallo et al.	2024	234.803	-55.409	1.364	–	–	–
Hunt & Reffert	2023	234.832	-55.373	1.368	-2.807	-5.276	-32.154
Almeida et al.	2023	234.888	-55.418	–	–	–	–
He et al.	2022	234.833	-55.376	1.365	-2.787	-5.271	–
Tarricq et al.	2022	234.852	-55.323	1.359	-2.799	-5.284	–
Dias et al.	2021	234.778	-55.39	1.353	-2.753	-5.302	-34.513
Cantat-Gaudin et al.	2020	234.809	-55.394	1.36	-2.736	-5.314	–
Cantat-Gaudin & Anders	2020	234.812	-55.38	1.356	-2.719	-5.292	–
Sim et al.	2019	234.813	-55.386	–	-2.71	-5.3	–

💡 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–	0.71	0.6	0.51	99	0.033	169	0.46	–
Li et al.	2025	0.68	0.63	–	114	-0.146	–	–	–
Almeida et al.	2025	0.72	0.67	–	137	–	192	–	–
Alfonso et al.	2024	0.71	0.46	–	99	0.033	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	169⁽¹⁾	–	–
Cavallo et al.	2024	0.70	0.49	–	427	0.320	–	–	–
Hunt & Reffert	2023	0.70	0.44	0.51	98	–	–	–	–
Almeida et al.	2023	0.71	0.60	–	196	-0.022	118⁽¹⁾	0.46	–
He et al.	2022	–	0.80	–	79	–	–	–	–
Tarricq et al.	2022	0.70	–	–	72	–	–	–	–
Dias et al.	2021	0.72	0.67	–	137	0.033	–	–	–
Cantat-Gaudin et al.	2020	0.71	0.46	–	71	–	–	–	–
Cantat-Gaudin & Anders	2020	0.72	–	–	–	–	–	–	–
Sim et al.	2019	0.72	–	–	79	–	–	–	–

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

Visualization

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