UPK 84

0.30 UTI

0.77

C_N

0.86

C_dens

1.0

C_C3

0.6

C_lit

0.4

C_dup

C3 classification AA

Number of members (P>50%) 149

Radius (P>50% members) 21.8 [arcmin]

C_N 0.77 Rich
C_dens 0.86 Dense
C_C3 1.0 Very high quality
C_lit 0.6 Moderately studied
C_dup 0.4 Possibly duplicate

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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UPK 84 is a rich, dense object of very high C3 quality. Its parallax locates it at a close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, old cluster (see Parameters). It is moderately studied in the literature.

⚠️ Warning: This is possibly a duplicate object, which shares a significant percentage of members with at least one previously reported entry. See table with shared members information.

Close Low extinction Near-solar metallicity Old

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

Data

🔍 Search references for UPK 84 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	–	310.224	20.21	1.078	-6.295	-9.294	24.191
Li et al.	2025	310.245	20.212	1.08	-6.258	-9.248	–
Almeida et al.	2025	310.255	20.17	–	–	–	–
Alfonso et al.	2024	310.231	20.191	1.049	-6.293	-9.297	–
Almeida et al.	2023	310.236	20.186	–	–	–	–
He et al.	2022	310.201	20.115	1.074	-6.286	-9.3	–
Tarricq et al.	2022	310.191	20.082	1.097	-6.287	-9.303	–
Dias et al.	2021	310.255	20.17	1.097	-6.298	-9.272	24.598
Cantat-Gaudin et al.	2020	310.245	20.212	1.08	-6.258	-9.248	–
Cantat-Gaudin & Anders	2020	310.247	20.191	1.083	-6.283	-9.281	–
Sim et al.	2019	310.219	20.175	–	-6.25	-9.25	–

💡 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]	Bfr	BSS
Li et al.	2025	0.87	0.30	–	1243	-0.147	–	–	–
Almeida et al.	2025	0.87	0.27	–	1183	–	147	–	–
Alfonso et al.	2024	0.95	0.31	–	954	-0.059	–	–	–
Almeida et al.	2023	0.90	0.23	–	1138	-0.011	242*	0.53	–
He et al.	2022	–	0.30	–	1122	–	–	–	–
Tarricq et al.	2022	0.92	–	–	1023	–	–	–	–
Dias et al.	2021	0.87	0.27	–	1183	-0.059	–	–	–
Cantat-Gaudin et al.	2020	0.95	0.31	–	1000	–	–	–	–
Cantat-Gaudin & Anders	2020	0.90	–	–	–	–	–	–	–
Sim et al.	2019	0.90	–	–	562	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Alessi 116	60.4	310.21	20.16	1.08	-6.29	-9.3	24.38	0.66
CWWDL 14281	36.9	310.2	20.17	1.07	-6.28	-9.3	23.99	0.0
UBC 131	20.8	310.18	20.07	1.06	-6.26	-9.29	24.32	0.0

💡 Note: The % column shows the percentage of members that UPK 84 shares with each listed object.

Visualization

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