UBC 1539

0.37 UTI

0.33

C_N

0.41

C_dens

1.0

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 33

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

C3 classification AA

C_N 0.33 Poorly populated
C_dens 0.41 Loose
C_C3 1.0 Very high quality
C_lit 0.06 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 1539 is a poorly populated, loose object of very 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.

Relatively close Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.97 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.97 (50th percentile).

Data

🔍 Search references for UBC 1539 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–	244.845	-57.201	0.477	-1.382	-4.364	-38.702
Hunt & Reffert	2024	244.839	-57.208	0.47	-1.399	-4.391	-38.657
Cavallo et al.	2024	244.854	-57.209	0.468	–	–	–
Hunt & Reffert	2023	244.839	-57.208	0.47	-1.399	-4.391	-38.657
Castro-Ginard et al.	2022	244.87	-57.2	0.47	-1.39	-4.36	–

💡 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–	2.01	0.83	0.74	150	0.190	277	–	–
Hunt & Reffert	2024	1.95	0.82	0.74	219	–	277⁽¹⁾	–	–
Cavallo et al.	2024	2.07	1.12	–	62	0.190	–	–	–
Hunt & Reffert	2023	1.95	0.82	0.74	219	–	–	–	–
Castro-Ginard et al.	2022	2.22	0.84	–	80	–	–	–	–

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

Visualization

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