UBC 240

0.40 UTI

0.62

C_N

0.31

C_dens

0.75

C_C3

0.16

C_lit

1.0

C_dup

N_m (P>50%) 75

Core radius and density 2.2 [pc], 1.5 [pc^-2]

C3 classification AB

C_N 0.62 Moderately populated
C_dens 0.31 Loose
C_C3 0.75 High quality
C_lit 0.16 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 240 is a moderately populated, loose object of 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.

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

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Data

🔍 Search references for UBC 240 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–	121.315	-33.021	0.391	-1.905	2.287	91.042
Li et al.	2025	121.312	-33.036	0.363	-1.911	2.281	–
Hunt & Reffert	2024	121.305	-32.999	0.395	-1.914	2.309	–
Cavallo et al.	2024	121.305	-33.015	0.393	–	–	–
Hunt & Reffert	2023	121.305	-32.999	0.395	-1.914	2.309	–
Cantat-Gaudin et al.	2020	121.312	-33.036	0.363	-1.911	2.281	–
Castro-Ginard et al.	2020	121.321	-33.038	0.366	-1.907	2.283	–

💡 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–	2.34	1.12	1.05	194	-0.102	376	–	–
Li et al.	2025	2.16	0.88	–	630	-0.054	–	–	–
Hunt & Reffert	2024	2.34	1.12	1.05	197	–	376⁽¹⁾	–	–
Cavallo et al.	2024	2.31	1.58	–	191	-0.150	–	–	–
Hunt & Reffert	2023	2.34	1.12	1.05	197	–	–	–	–
Cantat-Gaudin et al.	2020	2.61	1.05	–	135	–	–	–	–
Kounkel et al.	2020	2.42	1.66	–	42	–	–	–	–

(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 6540	17.3	121.32	-33.01	0.38	-2.03	2.35	–	0.04

💡 Note: The % column shows the percentage of members that UBC 240 shares with each listed object.

Visualization

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