UBC 437

0.40 UTI

0.55

C_N

0.12

C_dens

0.75

C_C3

0.29

C_lit

1.0

C_dup

N_m (P>50%) 60

Core radius and density 4.1 [pc], 0.6 [pc^-2]

C3 classification AB

C_N 0.55 Moderately populated
C_dens 0.12 Very loose
C_C3 0.75 High quality
C_lit 0.29 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 437 is a moderately populated, very loose object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption and metallicity parameters (see Parameters). It is poorly studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 279 along with NGC_2129.

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P61, along with NGC_2129.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for UBC 437 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–	89.535	22.039	0.502	0.126	-1.897	–
Almeida et al.	2025	89.542	22.06	–	–	–	–
Zhang et al.	2024	89.523	22.092	–	–	–	–
Hunt & Reffert	2024	89.523	22.092	0.492	0.151	-1.903	–
Cavallo et al.	2024	89.509	22.07	0.499	–	–	–
Hunt & Reffert	2023	89.523	22.092	0.492	0.151	-1.903	–
Almeida et al.	2023	89.543	22.069	–	–	–	–
Dias et al.	2021	89.542	22.06	0.47	0.15	-1.918	–
Cantat-Gaudin et al.	2020	89.533	22.036	0.493	0.146	-1.912	–
Castro-Ginard et al.	2020	89.514	22.042	0.499	0.154	-1.906	–

💡 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–	1.84	1.61	0.92	91	-0.111	372	0.57	–
Liu et al.	2025	3.42	0.54	–	200	–	–	–	–
Almeida et al.	2025	1.84	1.85	–	80	–	372	–	–
Zhang et al.	2024	–	–	–	–	-0.223⁽¹⁾	–	–	–
Hunt & Reffert	2024	1.83	1.61	0.92	122	–	388⁽¹⁾	–	–
Cavallo et al.	2024	2.02	1.67	–	141	0.210	–	–	–
Hunt & Reffert	2023	1.83	1.61	0.92	122	–	–	–	–
Almeida et al.	2023	1.76	1.85	–	67	-0.122	359⁽¹⁾	0.57	–
Dias et al.	2021	1.84	1.85	–	80	-0.100	–	–	–
Cantat-Gaudin et al.	2020	1.98	1.22	–	91	–	–	–	–
Kounkel et al.	2020	1.92	1.54	–	47	–	–	–	–

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

Visualization

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