HSC 2018

0.22 UTI

0.31

C_N

0.12

C_dens

0.62

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 31

Core radius and density 1.9 [pc], 0.6 [pc^-2]

C3 classification AC

C_N 0.31 Poorly populated
C_dens 0.12 Very 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

ℹ️

HSC 2018 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a low-mass, near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.

⚠️ 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.

Close Low extinction Low mass Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.97 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.97 (50th percentile).

Data

🔍 Search references for HSC 2018 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	122.624	-33.016	1.025	-5.752	6.901	35.37
Hunt & Reffert	2024	122.687	-33.062	1.023	-5.732	6.886	36.054
Cavallo et al.	2024	122.514	-32.844	1.025	–	–	–
Hunt & Reffert	2023	122.687	-33.062	1.023	-5.732	6.886	36.054

💡 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–	0.93	0.34	0.78	100	-0.050	48	–	–
Hunt & Reffert	2024	0.93	0.34	0.78	100	–	48⁽¹⁾	–	–
Cavallo et al.	2024	0.99	0.52	–	68	-0.050	–	–	–
Hunt & Reffert	2023	0.93	0.34	0.78	100	–	–	–	–

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

Visualization

ℹ️

1 2