HSC 108

0.17 UTI

0.66

C_N

0.37

C_dens

1.0

C_C3

0.03

C_lit

0.4

C_dup

N_m (P>50%) 81

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

C3 classification AA

C_N 0.66 Moderately populated
C_dens 0.37 Loose
C_C3 1.0 Very high quality
C_lit 0.03 Rarely studied
C_dup 0.4 Possibly duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 108 is a moderately populated, loose object of very 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, near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.

⚠️ Warning: This is possibly a duplicate object, which shares a significant percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close High extinction Massive Near-solar metallicity Intermediate age

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P24, along with Teutsch_14a.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.11 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.11 (50th percentile).

Data

🔍 Search references for HSC 108 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–	271.324	-22.935	0.304	-0.057	-1.416	16.268
Hunt & Reffert	2024	271.327	-22.928	0.31	-0.075	-1.448	16.251
Cavallo et al.	2024	271.332	-22.942	0.309	–	–	–
Hunt & Reffert	2023	271.327	-22.928	0.31	-0.075	-1.448	16.251

💡 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–	2.76	3.29	2.61	106	0.340	1548	–	–
Hunt & Reffert	2024	2.76	3.29	2.61	106	–	1548⁽¹⁾	–	–
Cavallo et al.	2024	2.22	3.23	–	288	0.340	–	–	–
Hunt & Reffert	2023	2.76	3.29	2.61	106	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 1685	60.5	271.35	-22.94	0.3	-0.1	-1.47	15.66	0.29
CWNU 3539	42.0	271.32	-22.95	0.29	-0.05	-1.37	37.42	0.0

💡 Note: The % column shows the percentage of members that HSC 108 shares with each listed object.

Visualization

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