UBC 337

0.61 UTI

0.8

C_N

0.78

C_dens

1.0

C_C3

0.23

C_lit

1.0

C_dup

N_m (P>50%) 224

Core radius and density 2.8 [pc], 3.9 [pc^-2]

C3 classification AA

C_N 0.8 Rich
C_dens 0.78 Dense
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 337 is a rich, dense object of very high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age, metallicity, and mass parameters (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 High extinction Massive Near-solar metallicity Intermediate age

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: 0.25 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.25 (50th percentile).

Data

🔍 Search references for UBC 337 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–	271.73	-24.67	0.552	0.521	-0.753	4.45
Li et al.	2025	271.722	-24.649	0.566	0.482	-0.711	–
Almeida et al.	2025	271.738	-24.65	–	–	–	–
Hunt & Reffert	2024	271.688	-24.684	0.531	0.516	-0.785	23.748
Cavallo et al.	2024	271.725	-24.694	0.535	–	–	–
Hunt & Reffert	2023	271.688	-24.684	0.531	0.516	-0.785	23.748
Dias et al.	2021	271.738	-24.65	0.541	0.486	-0.724	4.344
Cantat-Gaudin et al.	2020	271.722	-24.649	0.566	0.482	-0.711	–
Castro-Ginard et al.	2020	271.723	-24.649	0.566	0.473	-0.719	–

💡 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–	1.705	3.185	2.7	110	-0.147	2046	–	–
Li et al.	2025	0.78	2.18	–	1686	-0.147	–	–	–
Almeida et al.	2025	1.72	2.99	–	7	–	773	–	–
Hunt & Reffert	2024	1.73	3.38	2.70	178	–	3320⁽¹⁾	–	–
Cavallo et al.	2024	1.32	3.84	–	295	-0.380	–	–	–
Hunt & Reffert	2023	1.73	3.38	2.70	178	–	–	–	–
Dias et al.	2021	1.72	2.99	–	7	0.088	–	–	–
Cantat-Gaudin et al.	2020	1.66	2.49	–	42	–	–	–	–
Kounkel et al.	2020	1.69	4.69	–	8	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0005	11.6	271.73	-24.7	0.55	0.59	-0.8	3.88	0.0

💡 Note: The % column shows the percentage of members that UBC 337 shares with each listed object.

Visualization

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