UBC 1628

0.22 UTI

0.0

C_N

0.22

C_dens

0.75

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 19

Core radius and density 1.5 [pc], 1.1 [pc^-2]

C3 classification BA

C_N 0.0 Sparse
C_dens 0.22 Very loose
C_C3 0.75 High quality
C_lit 0.06 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UBC 1628 is a sparse, very loose object of high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied in the literature.

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

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

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

Data

🔍 Search references for UBC 1628 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–	230.937	-61.971	0.518	-2.559	-2.847	-55.873
Hunt & Reffert	2024	230.94	-61.978	0.526	-2.605	-2.866	-49.903
Cavallo et al.	2024	230.912	-61.974	0.528	–	–	–
Hunt & Reffert	2023	230.94	-61.978	0.526	-2.605	-2.866	-49.903
Castro-Ginard et al.	2022	230.94	-61.99	0.52	-2.57	-2.84	–

💡 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–	1.79	1.43	0.26	184	0.020	144	–	–
Hunt & Reffert	2024	1.79	1.43	0.26	153	–	144⁽¹⁾	–	–
Cavallo et al.	2024	1.75	1.60	–	214	0.020	–	–	–
Hunt & Reffert	2023	1.79	1.43	0.26	153	–	–	–	–
Castro-Ginard et al.	2022	2.06	1.04	–	294	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 443	88.0	230.94	-61.97	0.51	-2.55	-2.86	-55.87	0.02

💡 Note: The % column shows the percentage of members that UBC 1628 shares with each listed object.

Visualization

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