HSC 284

0.27 UTI

0.31

C_N

0.37

C_dens

0.62

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 31

Core radius and density 1.4 [pc], 1.9 [pc^-2]

C3 classification CA

C_N 0.31 Poorly populated
C_dens 0.37 Loose
C_C3 0.62 Intermediate 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 284 is a poorly populated, loose object of intermediate C3 quality. Its parallax locates it at a moderate 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 parameter (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.

Distant High extinction Massive Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.14 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.14 (50th percentile).

Data

🔍 Search references for HSC 284 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–	280.295	-3.908	0.252	-1.515	-3.945	57.61
Hunt & Reffert	2024	280.303	-3.911	0.253	-1.497	-3.958	57.411
Cavallo et al.	2024	280.294	-3.909	0.255	–	–	–
Hunt & Reffert	2023	280.303	-3.911	0.253	-1.497	-3.958	57.411

💡 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–	3.29	4.65	2.43	115	0.280	1200	–	–
Hunt & Reffert	2024	3.29	4.65	2.43	115	–	1200⁽¹⁾	–	–
Cavallo et al.	2024	4.83	4.60	–	16	0.280	–	–	–
Hunt & Reffert	2023	3.29	4.65	2.43	115	–	–	–	–

(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 3599	100.0	280.3	-3.91	0.25	-1.52	-3.94	57.45	0.14

💡 Note: The % column shows the percentage of members that HSC 284 shares with each listed object.

Visualization

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