UBC 287

0.71 UTI

0.75

C_N

1.0

C_dens

1.0

C_C3

0.4

C_lit

1.0

C_dup

N₅₀ (P>50% members) 109

Stellar density (N₅₀/rad) 22.1 [N/pc²]

C3 classification AA

C_N 0.75 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.4 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UBC 287 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption, age, and metallicity parameters (see Parameters). It is poorly 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 Young

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P41, along with HSC_2531.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 287 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–	189.77	-61.255	0.459	-4.784	-0.727	–
Li et al.	2025	189.765	-61.272	0.433	-4.749	-0.734	–
Hunt & Reffert	2024	189.786	-61.258	0.465	-4.788	-0.713	–
Celli et al.	2024	189.765	-61.272	–	–	–	–
Cavallo et al.	2024	189.696	-61.263	0.465	–	–	–
Hunt & Reffert	2023	189.786	-61.258	0.465	-4.788	-0.713	–
Cantat-Gaudin et al.	2020	189.765	-61.272	0.433	-4.749	-0.734	–
Castro-Ginard et al.	2020	189.744	-61.269	0.433	-4.748	-0.741	–

💡 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–	2.055	1.9	2.63	28	0.169	674	–	–
Li et al.	2025	1.05	0.46	–	1059	-0.042	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	835⁽¹⁾	–	–
Celli et al.	2024	–	–	–	23	–	514	–	–
Cavallo et al.	2024	2.11	2.12	–	28	0.380	–	–	–
Hunt & Reffert	2023	2.00	1.98	2.63	32	–	–	–	–
Cantat-Gaudin et al.	2020	2.36	1.82	–	23	–	–	–	–

(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 2770	82.6	189.77	-61.25	0.47	-4.79	-0.7	–	0.1
OC 0582	44.0	189.78	-61.25	0.48	-4.81	-0.73	–	0.02

💡 Note: The % column shows the percentage of members that UBC 287 shares with each listed object.

Visualization

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