UBC 539

0.11 UTI

0.36

C_N

0.54

C_dens

1.0

C_C3

0.0

C_lit

0.28

C_dup

C3 classification AA

Number of members (P>50%) 36

Radius (P>50% members) 5.4 [arcmin]

C_N 0.36 Poorly populated
C_dens 0.54 Moderately dense
C_C3 1.0 Very high quality
C_lit 0.0 Rarely studied
C_dup 0.28 Possibly duplicate

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

Overview

ℹ️

UBC 539 is a poorly populated, moderately dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied in the literature.

⚠️ Warning: This is possibly a duplicate object, which shares a significant percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Data

🔍 Search references for UBC 539 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	–	243.057	-51.48	0.43	-1.669	-1.923	-43.241
Li et al.	2025	243.053	-51.471	0.418	-1.617	-1.936	–
Cantat-Gaudin et al.	2020	243.053	-51.471	0.418	-1.617	-1.936	–
Castro-Ginard et al.	2020	243.085	-51.484	0.415	-1.63	-1.942	–

💡 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	1.76	1.65	–	338	-0.053	–	–	–
Cantat-Gaudin et al.	2020	2.41	1.58	–	54	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
DBSB 144	72.2	243.05	-51.49	0.44	-1.68	-1.92	-43.24	0.49

💡 Note: The % column shows the percentage of members that UBC 539 shares with each listed object.

Visualization

ℹ️

1 2