HSC 40

0.48 UTI

0.59

C_N

1.0

C_dens

0.75

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 68

Core radius and density 0.9 [pc], 5.7 [pc^-2]

C3 classification BA

C_N 0.59 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.03 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 40 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a massive, metal-poor, intermediate-age 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 High extinction Massive Metal-poor Intermediate age

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.10 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.10 (50th percentile).

Data

🔍 Search references for HSC 40 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–	268.969	-26.721	0.333	-0.649	-2.453	-17.655
Hunt & Reffert	2024	268.971	-26.726	0.349	-0.635	-2.414	-10.691
Cavallo et al.	2024	268.971	-26.715	0.354	–	–	–
Hunt & Reffert	2023	268.971	-26.726	0.349	-0.635	-2.414	-10.691

💡 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–	2.58	4.97	2.83	108	-0.800	2246	–	–
Hunt & Reffert	2024	2.58	4.97	2.83	108	–	2246⁽¹⁾	–	–
Cavallo et al.	2024	3.10	5.08	–	100	-0.800	–	–	–
Hunt & Reffert	2023	2.58	4.97	2.83	108	–	–	–	–

(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 3089	100.0	268.97	-26.72	0.32	-0.66	-2.47	-17.32	0.13

💡 Note: The % column shows the percentage of members that HSC 40 shares with each listed object.

Visualization

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