HSC 2102

0.21 UTI

0.39

C_N

0.1

C_dens

0.5

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 39

Core radius and density 2.6 [pc], 0.5 [pc^-2]

C3 classification BB

C_N 0.39 Poorly populated
C_dens 0.1 Very loose
C_C3 0.5 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 2102 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, young 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.

⚠️ 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.

Very distant High extinction Near-solar metallicity Young

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.13 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.13 (50th percentile).

Data

🔍 Search references for HSC 2102 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–	126.621	-43.924	0.158	-2.811	3.784	65.875
Hunt & Reffert	2024	126.627	-43.919	0.156	-2.823	3.771	72.912
Cavallo et al.	2024	126.606	-43.898	0.155	–	–	–
Hunt & Reffert	2023	126.627	-43.919	0.156	-2.823	3.771	72.912

💡 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–	5.64	3.29	2.39	36	-0.350	883	–	–
Hunt & Reffert	2024	5.64	3.29	2.39	36	–	883⁽¹⁾	–	–
Cavallo et al.	2024	2.82	3.11	–	195	-0.350	–	–	–
Hunt & Reffert	2023	5.64	3.29	2.39	36	–	–	–	–

(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 3025	82.1	126.63	-43.92	0.16	-2.81	3.77	72.91	0.03

💡 Note: The % column shows the percentage of members that HSC 2102 shares with each listed object.

Visualization

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