HSC 1440

0.27 UTI

0.0

C_N

0.49

C_dens

0.75

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 22

Core radius and density 1.1 [pc], 2.5 [pc^-2]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.49 Loose
C_C3 0.75 High 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 1440 is a sparse, loose object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young 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.

Relatively close Low extinction Near-solar metallicity Young

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P11, along with CWNU_2105.

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 HSC 1440 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–	89.156	27.642	0.655	0.141	-2.299	27.49
Zhang et al.	2024	89.143	27.651	–	–	–	–
Hunt & Reffert	2024	89.143	27.651	0.647	0.131	-2.294	4.741
Cavallo et al.	2024	89.108	27.635	0.652	–	–	–
Hunt & Reffert	2023	89.143	27.651	0.647	0.131	-2.294	4.741

💡 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–	1.49	0.9	1.44	75	-0.017	133	–	–
Zhang et al.	2024	–	–	–	–	-0.074⁽¹⁾	–	–	–
Hunt & Reffert	2024	1.49	0.90	1.44	75	–	133⁽¹⁾	–	–
Cavallo et al.	2024	1.58	1.26	–	16	0.040	–	–	–
Hunt & Reffert	2023	1.49	0.90	1.44	75	–	–	–	–

(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 3789	88.0	89.14	27.64	0.66	0.14	-2.3	27.49	0.03

💡 Note: The % column shows the percentage of members that HSC 1440 shares with each listed object.

Visualization

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