UBC 279

0.42 UTI

0.76

C_N

0.25

C_dens

0.75

C_C3

0.16

C_lit

1.0

C_dup

N_m (P>50%) 114

Core radius and density 3.2 [pc], 1.3 [pc^-2]

C3 classification AB

C_N 0.76 Rich
C_dens 0.25 Loose
C_C3 0.75 High quality
C_lit 0.16 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 279 is a rich, loose object of high C3 quality. Its parallax locates it at a relatively 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 metallicity parameter (see Parameters). It is rarely studied in the literature.

Note: This object shares a significant 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 279 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–	173.515	-66.098	0.629	-7.285	2.068	-13.091
Li et al.	2025	173.443	-66.087	0.621	-7.296	2.034	–
Hunt & Reffert	2024	173.484	-66.111	0.631	-7.301	2.083	-13.146
Cavallo et al.	2024	173.367	-66.087	0.633	–	–	–
Hunt & Reffert	2023	173.484	-66.111	0.631	-7.301	2.083	-13.146
Cantat-Gaudin et al.	2020	173.443	-66.087	0.621	-7.296	2.034	–
Castro-Ginard et al.	2020	173.437	-66.089	0.62	-7.283	2.041	–

💡 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–	1.51	0.775	1.02	272	0.144	731	–	–
Li et al.	2025	1.38	0.78	–	426	-0.052	–	–	–
Hunt & Reffert	2024	1.51	0.77	1.02	248	–	731⁽¹⁾	–	–
Cavallo et al.	2024	1.51	0.82	–	479	0.340	–	–	–
Hunt & Reffert	2023	1.51	0.77	1.02	248	–	–	–	–
Cantat-Gaudin et al.	2020	1.61	0.77	–	295	–	–	–	–
Kounkel et al.	2020	1.29	1.42	–	100	–	–	–	–

(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 13313	67.5	173.44	-66.09	0.63	-7.29	2.09	-14.56	0.01
OC 0570	6.1	172.55	-66.08	0.63	-7.22	2.21	-12.67	0.1

💡 Note: The % column shows the percentage of members that UBC 279 shares with each listed object.

Visualization

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