UPK 629

0.40 UTI

0.49

C_N

0.07

C_dens

0.75

C_C3

0.35

C_lit

1.0

C_dup

N_m (P>50%) 49

Core radius and density 4.4 [pc], 0.3 [pc^-2]

C3 classification AB

C_N 0.49 Poorly populated
C_dens 0.07 Very loose
C_C3 0.75 High quality
C_lit 0.35 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UPK 629 is a poorly populated, very loose object of 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, intermediate-age cluster, but with a large variance across recent sources for the absorption, age, and metallicity parameters (see Parameters). It is poorly studied in the literature.

Close Low extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for UPK 629 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–	255.248	-55.979	1.082	0.731	-3.761	11.087
Li et al.	2025	255.222	-55.976	1.059	0.791	-3.782	–
Hu & Soubiran	2025	255.148	-56.047	–	–	–	–
Almeida et al.	2025	255.296	-56.06	–	–	–	–
Alfonso et al.	2024	255.145	-56.103	1.019	0.586	-3.742	–
Cavallo et al.	2024	255.147	-56.047	1.059	–	–	–
Hunt & Reffert	2023	254.991	-56.419	1.048	0.708	-3.812	3.861
Almeida et al.	2023	255.27	-55.996	–	–	–	–
Tarricq et al.	2022	255.131	-55.883	1.091	0.695	-3.775	–
Jadhav & Subramaniam	2021	255.222	-55.976	–	–	–	–
Dias et al.	2021	255.296	-56.06	1.046	0.82	-3.764	3.791
Cantat-Gaudin et al.	2020	255.222	-55.976	1.059	0.791	-3.782	–
Cantat-Gaudin & Anders	2020	255.238	-55.992	1.038	0.819	-3.796	–
Sim et al.	2019	255.192	-55.984	–	0.8	-3.8	–

💡 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–	0.92	0.5	0.57	451	0.007	157	0.66	0
Li et al.	2025	0.79	0.60	–	314	-0.337	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.200⁽⁵⁾	–	–	–
Almeida et al.	2025	0.92	0.58	–	451	–	153	–	–
Alfonso et al.	2024	0.95	0.36	–	497	0.007	–	–	–
Cavallo et al.	2024	0.91	0.50	–	537	0.060	–	–	–
Hunt & Reffert	2023	0.90	0.34	0.57	239	–	–	–	–
Almeida et al.	2023	1.82	1.69	–	113	0.031	489⁽¹⁾	0.66	–
Tarricq et al.	2022	0.92	–	–	537	–	–	–	–
Jadhav & Subramaniam	2021	0.95	0.36	–	525	–	157	–	0⁽¹⁾
Dias et al.	2021	0.92	0.58	–	451	0.007	–	–	–
Cantat-Gaudin et al.	2020	0.95	0.36	–	525	–	–	–	–
Cantat-Gaudin & Anders	2020	0.94	–	–	–	–	–	–	–
Sim et al.	2019	0.92	–	–	79	–	–	–	–

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

Visualization

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