UBC 440

0.44 UTI

0.41

C_N

0.27

C_dens

1.0

C_C3

0.26

C_lit

1.0

C_dup

N_m (P>50%) 41

Core radius and density 1.9 [pc], 1.4 [pc^-2]

C3 classification AA

C_N 0.41 Poorly populated
C_dens 0.27 Loose
C_C3 1.0 Very high quality
C_lit 0.26 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UBC 440 is a poorly populated, loose object of very high C3 quality. Its parallax locates it at a moderate distance, well above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is poorly studied in the literature.

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

Relatively close Low extinction Near-solar metallicity Old

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 440 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–	113.103	5.994	0.295	-0.909	1.25	65.923
Li et al.	2025	113.09	6.015	0.297	-0.961	1.217	–
Hu & Soubiran	2025	113.097	6.007	–	–	–	–
Zhang et al.	2024	113.101	5.992	–	–	–	–
Hunt & Reffert	2024	113.101	5.992	0.314	-0.889	1.242	65.922
Cavallo et al.	2024	113.097	6.007	0.31	–	–	–
Hunt & Reffert	2023	113.101	5.992	0.314	-0.889	1.242	65.922
Jadhav & Subramaniam	2021	113.09	6.015	–	–	–	–
Cantat-Gaudin et al.	2020	113.09	6.015	0.297	-0.961	1.217	–
Castro-Ginard et al.	2020	113.089	6.042	0.296	-0.992	1.217	–

💡 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–	2.94	0.28	0.38	1059	-0.320	240	–	0
Li et al.	2025	3.21	0.14	–	1196	0.002	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.320⁽⁵⁾	–	–	–
Zhang et al.	2024	–	–	–	–	-0.372⁽¹⁾	–	–	–
Hunt & Reffert	2024	2.92	0.10	0.38	1060	–	222⁽¹⁾	–	–
Cavallo et al.	2024	2.94	0.46	–	1122	-0.320	–	–	–
Hunt & Reffert	2023	2.92	0.10	0.38	1059	–	–	–	–
Jadhav & Subramaniam	2021	3.16	0.28	–	1023	–	259	–	0⁽¹⁾
Cantat-Gaudin et al.	2020	3.16	0.28	–	1023	–	–	–	–
Kounkel et al.	2020	2.87	1.10	–	398	–	–	–	–

(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 13248	78.0	113.1	5.99	0.29	-0.9	1.26	65.92	0.0

💡 Note: The % column shows the percentage of members that UBC 440 shares with each listed object.

Visualization

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