UBC 1021

0.44 UTI

0.56

C_N

0.49

C_dens

1.0

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 63

Core radius and density 1.6 [pc], 2.5 [pc^-2]

C3 classification AA

C_N 0.56 Moderately populated
C_dens 0.49 Loose
C_C3 1.0 Very 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 1021 is a moderately populated, loose object of very 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 2 later reported entries. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.77 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.77 (50th percentile).

Data

🔍 Search references for UBC 1021 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–	280.89	-14.426	0.603	0.807	-0.76	-3.554
Hunt & Reffert	2024	280.897	-14.427	0.592	0.828	-0.631	-15.096
Cavallo et al.	2024	280.836	-14.483	0.593	–	–	–
Hunt & Reffert	2023	280.897	-14.427	0.592	0.828	-0.631	-15.096
Castro-Ginard et al.	2022	280.84	-14.43	0.61	0.79	-0.77	–

💡 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–	1.625	2.04	2.6	106	0.340	572	–	–
Hunt & Reffert	2024	1.57	2.04	2.60	116	–	572⁽¹⁾	–	–
Cavallo et al.	2024	1.77	2.32	–	95	0.340	–	–	–
Hunt & Reffert	2023	1.57	2.04	2.60	116	–	–	–	–
Castro-Ginard et al.	2022	1.68	1.91	–	42	–	–	–	–

(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 328	98.4	280.89	-14.43	0.6	0.8	-0.76	-3.55	0.06
CWNU 1980	1.6	280.71	-14.57	0.58	0.94	-0.38	-4.86	0.16

💡 Note: The % column shows the percentage of members that UBC 1021 shares with each listed object.

Visualization

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