UBC 222

0.40 UTI

0.55

C_N

0.29

C_dens

0.75

C_C3

0.19

C_lit

1.0

C_dup

N_m (P>50%) 60

Core radius and density 2.0 [pc], 1.5 [pc^-2]

C3 classification AB

C_N 0.55 Moderately populated
C_dens 0.29 Loose
C_C3 0.75 High quality
C_lit 0.19 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 222 is a moderately populated, loose object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by low 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 Low 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 222 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–	109.917	-20.845	0.46	-2.671	2.865	61.865
Li et al.	2025	109.924	-20.841	0.452	-2.691	2.829	–
Hunt & Reffert	2024	109.922	-20.851	0.464	-2.667	2.876	61.881
Cavallo et al.	2024	109.921	-20.847	0.463	–	–	–
Hunt & Reffert	2023	109.922	-20.851	0.464	-2.667	2.876	61.881
Jadhav & Subramaniam	2021	109.924	-20.841	–	–	–	–
Cantat-Gaudin et al.	2020	109.924	-20.841	0.452	-2.691	2.829	–
Castro-Ginard et al.	2020	109.925	-20.856	0.448	-2.68	2.829	–

💡 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–	2.0	0.84	1.06	138	-0.236	240	–	0
Li et al.	2025	1.84	1.15	–	138	-0.343	–	–	–
Hunt & Reffert	2024	2.00	0.84	1.06	137	–	286⁽¹⁾	–	–
Cavallo et al.	2024	1.95	1.10	–	224	-0.130	–	–	–
Hunt & Reffert	2023	2.00	0.84	1.06	136	–	–	–	–
Jadhav & Subramaniam	2021	2.21	0.56	–	427	–	193	–	0⁽¹⁾
Cantat-Gaudin et al.	2020	2.21	0.56	–	427	–	–	–	–
Kounkel et al.	2020	1.99	1.31	–	107	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 3525	98.3	109.91	-20.84	0.47	-2.67	2.87	61.87	0.06
OC 0400	41.7	109.92	-20.83	0.47	-2.67	2.87	–	0.0

💡 Note: The % column shows the percentage of members that UBC 222 shares with each listed object.

Visualization

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