UBC 487

0.53 UTI

0.37

C_N

0.48

C_dens

0.75

C_C3

0.54

C_lit

1.0

C_dup

N_m (P>50%) 37

Core radius and density 1.5 [pc], 2.4 [pc^-2]

C3 classification AB

C_N 0.37 Poorly populated
C_dens 0.48 Loose
C_C3 0.75 High quality
C_lit 0.54 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UBC 487 is a poorly populated, loose object of high C3 quality. Its parallax locates it at a relatively close distance, near 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 age and metallicity parameters (see Parameters). It is moderately studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Young

Li et al. (2026)
Tidal & Core radii: r_t=82+/-78.5 [pc], r_c=0.6+/-0.0 [pc]; stars within r_t: N~86

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 376 along with UBC_251.

Palma et al. (2025)
Classified as optical pair P602, along with UBC_251.

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

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.95 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.95 (50th percentile).

Data

🔍 Search references for UBC 487 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–	139.681	-51.6	0.525	-5.784	4.158	–
Li et al.	2026	139.69	-51.6	–	–	–	–
Li et al.	2025	139.691	-51.6	0.499	-5.812	4.14	–
Almeida et al.	2025	139.748	-51.603	–	–	–	–
Hunt & Reffert	2024	139.681	-51.588	0.528	-5.787	4.181	–
Celli et al.	2024	139.691	-51.6	–	–	–	–
Cavallo et al.	2024	139.705	-51.609	0.53	–	–	–
Hunt & Reffert	2023	139.681	-51.588	0.528	-5.787	4.181	–
Dias et al.	2021	139.748	-51.603	0.476	-5.806	4.127	–
Cantat-Gaudin et al.	2020	139.691	-51.6	0.499	-5.812	4.14	–
Castro-Ginard et al.	2020	139.716	-51.6	0.499	-5.807	4.126	–

💡 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–	1.85	1.84	1.58	24	0.194	297	–	–
Liu et al.	2025	4.51	0.71	–	9	–	–	–	–
Li et al.	2025	1.62	1.84	–	128	-0.045	–	–	–
Almeida et al.	2025	1.85	1.94	–	19	–	297	–	–
Hunt & Reffert	2024	1.81	1.99	1.58	24	–	298⁽¹⁾	–	–
Celli et al.	2024	–	–	–	26	–	205	–	–
Cavallo et al.	2024	1.91	1.38	–	123	0.650	–	–	–
Hunt & Reffert	2023	1.81	1.99	1.58	24	–	–	–	–
Dias et al.	2021	1.85	1.94	–	19	0.194	–	–	–
Cantat-Gaudin et al.	2020	1.83	1.39	–	26	–	–	–	–
Kounkel et al.	2020	2.54	1.81	–	5	–	–	–	–

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

Visualization

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