HSC 1937

0.17 UTI

0.0

C_N

0.2

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 23

Core radius and density 2.0 [pc], 1.0 [pc^-2]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.2 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.06 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 1937 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, old cluster (see Parameters). It was recently reported in the literature.

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

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Distant Low extinction Near-solar metallicity Old

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.45 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.45 (50th percentile).

Data

🔍 Search references for HSC 1937 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–	110.888	-28.605	0.193	-1.544	2.16	51.868
Hu & Soubiran	2025	110.892	-28.61	–	–	–	–
Hunt & Reffert	2024	110.882	-28.603	0.193	-1.535	2.16	46.635
Cavallo et al.	2024	110.892	-28.61	0.197	–	–	–
Hunt & Reffert	2023	110.882	-28.603	0.193	-1.535	2.16	46.635

💡 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–	4.84	0.63	1.22	1606	-0.375	246	–	–
Hu & Soubiran	2025	–	–	–	–	-0.310⁽⁵⁾	–	–	–
Hunt & Reffert	2024	4.84	0.63	1.22	1606	–	246⁽¹⁾	–	–
Cavallo et al.	2024	4.07	1.26	–	1148	-0.440	–	–	–
Hunt & Reffert	2023	4.84	0.63	1.22	1607	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 3036	100.0	110.88	-28.61	0.19	-1.55	2.16	51.87	0.03

💡 Note: The % column shows the percentage of members that HSC 1937 shares with each listed object.

Visualization

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