UBC 280

0.57 UTI

0.48

C_N

0.6

C_dens

0.75

C_C3

0.5

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 48

Radius (P>50% members) 5.7 [arcmin]

C_N 0.48 Poorly populated
C_dens 0.6 Moderately dense
C_C3 0.75 High quality
C_lit 0.5 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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UBC 280 is a poorly populated, moderately dense object of high C3 quality. Its parallax locates it at a moderate 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 age and metallicity parameters (see Parameters). It is moderately studied in the literature.

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

Relatively close Low extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 280 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	–	177.948	-62.664	0.416	-5.607	0.716	-11.964
Li et al.	2025	177.923	-62.646	0.398	-5.63	0.662	–
Almeida et al.	2025	177.927	-62.649	–	–	–	–
Hunt & Reffert	2024	177.807	-62.658	0.416	-5.634	0.757	-18.237
Cavallo et al.	2024	177.918	-62.664	0.418	–	–	–
Hunt & Reffert	2023	177.807	-62.658	0.416	-5.634	0.757	-18.237
Dias et al.	2021	177.927	-62.649	0.389	-5.646	0.666	-12.749
Cantat-Gaudin et al.	2020	177.923	-62.646	0.398	-5.63	0.662	–
Castro-Ginard et al.	2020	177.917	-62.645	0.396	-5.637	0.661	–

💡 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]	Bfr	BSS
Li et al.	2025	1.85	0.81	–	30	-0.349	–	–	–
Almeida et al.	2025	2.25	0.86	–	33	–	767	–	–
Hunt & Reffert	2024	–	–	–	–	–	549*	–	–
Cavallo et al.	2024	2.06	0.68	–	158	-0.040	–	–	–
Hunt & Reffert	2023	2.15	0.46	0.44	56	–	–	–	–
Dias et al.	2021	2.25	0.86	–	33	0.172	–	–	–
Cantat-Gaudin et al.	2020	2.36	0.61	–	51	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 13583	45.8	177.88	-62.66	0.43	-5.59	0.75	-13.23	0.16

💡 Note: The % column shows the percentage of members that UBC 280 shares with each listed object.

Visualization

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