UBC 535

0.40 UTI

0.35

C_N

0.2

C_dens

1.0

C_C3

0.23

C_lit

1.0

C_dup

N_m (P>50%) 35

Core radius and density 2.3 [pc], 1.0 [pc^-2]

C3 classification AA

C_N 0.35 Poorly populated
C_dens 0.2 Very loose
C_C3 1.0 Very high quality
C_lit 0.23 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 535 is a poorly populated, very loose object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is rarely studied in the literature.

Note: This object shares a significant percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Very young

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

Cavallo et al. (2024)
Gold 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 535 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–	237.545	-56.754	0.306	-3.962	-4.54	–
Almeida et al.	2025	237.519	-56.781	–	–	–	–
Hunt & Reffert	2024	237.6	-56.747	0.31	-3.999	-4.5	-47.875
Celli et al.	2024	237.584	-56.758	–	–	–	–
Cavallo et al.	2024	237.543	-56.772	0.31	–	–	–
Hunt & Reffert	2023	237.6	-56.747	0.31	-3.999	-4.5	-47.875
Dias et al.	2021	237.519	-56.781	0.307	-3.948	-4.546	-35.182
Cantat-Gaudin et al.	2020	237.584	-56.758	0.3	-3.938	-4.544	–
Castro-Ginard et al.	2020	237.542	-56.77	0.297	-3.934	-4.548	–

💡 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–	2.93	2.19	1.52	18	0.310	604	–	–
Almeida et al.	2025	3.02	2.17	–	10	–	604	–	–
Hunt & Reffert	2024	2.93	2.39	1.52	64	–	686⁽¹⁾	–	–
Celli et al.	2024	–	–	–	18	–	305	–	–
Cavallo et al.	2024	2.45	2.19	–	83	0.260	–	–	–
Hunt & Reffert	2023	2.93	2.38	1.52	64	–	–	–	–
Dias et al.	2021	3.02	2.17	–	10	0.360	–	–	–
Cantat-Gaudin et al.	2020	2.86	2.16	–	18	–	–	–	–
Kounkel et al.	2020	2.87	2.31	–	16	–	–	–	–

(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 5649	74.3	237.56	-56.76	0.31	-3.97	-4.52	-67.17	0.06

💡 Note: The % column shows the percentage of members that UBC 535 shares with each listed object.

Visualization

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