UPK 624

(OCSN 321)

0.75 UTI

0.55

C_N

1.0

C_dens

1.0

C_C3

0.6

C_lit

1.0

C_dup

N₅₀ (P>50% members) 59

Stellar density (N₅₀/rad) 11.0 [N/pc²]

C3 classification AA

C_N 0.55 Moderately populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.6 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 624 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a very 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 metallicity parameter (see Parameters). It is moderately studied in the literature.

Very 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.

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

Data

🔍 Search references for UPK 624 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–	254.187	-60.464	3.154	-1.545	-14.389	2.913
Li et al.	2025	254.138	-60.422	3.13	-1.422	-14.336	–
Almeida et al.	2025	253.999	-60.395	–	–	–	–
Alfonso et al.	2024	254.088	-60.301	3.123	-1.545	-14.361	–
Cavallo et al.	2024	253.985	-60.359	3.125	–	–	–
Hunt & Reffert	2023	254.377	-60.519	3.109	-1.715	-14.384	1.164
Qin et al.	2023	254.07	-60.39	3.15	-1.54	-14.38	1.98
Dias et al.	2021	253.999	-60.395	3.14	-1.414	-14.361	6.403
Spina et al.	2021	254.123	-60.451	3.138	-1.453	-14.261	–
Cantat-Gaudin et al.	2020	254.138	-60.422	3.13	-1.422	-14.336	–
Cantat-Gaudin & Anders	2020	254.138	-60.422	3.166	-1.35	-14.355	–
Sim et al.	2019	254.091	-60.391	–	-1.44	-14.33	–

💡 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–	0.32	0.505	0.43	42	0.140	55	–	–
Li et al.	2025	0.29	0.33	–	55	-0.023	–	–	–
Almeida et al.	2025	0.33	0.51	–	64	–	55	–	–
Alfonso et al.	2024	0.32	0.50	–	44	0.206	–	–	–
Cavallo et al.	2024	0.32	0.70	–	22	0.140	–	–	–
Hunt & Reffert	2023	0.31	0.20	0.43	25	–	–	–	–
Qin et al.	2023	0.43	0.59	–	22	–	–	–	–
Dias et al.	2021	0.33	0.51	–	64	0.206	–	–	–
Spina et al.	2021	0.32	–	–	40	-0.095⁽²⁰⁾	–	–	–
Cantat-Gaudin et al.	2020	0.32	0.50	–	40	–	–	–	–
Cantat-Gaudin & Anders	2020	0.31	–	–	–	–	–	–	–
Sim et al.	2019	0.33	–	–	45	–	–	–	–

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

Visualization

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