HSC 1722

0.28 UTI

0.45

C_N

0.12

C_dens

0.75

C_C3

0.06

C_lit

0.96

C_dup

N_m (P>50%) 45

Core radius and density 3.2 [pc], 0.6 [pc^-2]

C3 classification AB

C_N 0.45 Poorly populated
C_dens 0.12 Very loose
C_C3 0.75 High quality
C_lit 0.06 Rarely studied
C_dup 0.96 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 1722 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It was recently reported in the literature.

Note: This is a unique object, which shares a very small percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as primordial binary cluster 205 along with HSC_1723, and of multiple system 58 along with HSC_1723, HSC_1721 and NGC_2311.

Palma et al. (2025)
Part of multiple system G128, along with HSC_1723 and HSC_1721.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for HSC 1722 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–	104.568	-4.75	0.429	-1.758	0.754	–
Liu et al.	2025	104.54	-4.75	0.43	-1.77	0.76	–
Hunt & Reffert	2024	104.541	-4.754	0.428	-1.769	0.756	–
Cavallo et al.	2024	104.593	-4.727	0.426	–	–	–
Hunt & Reffert	2023	104.541	-4.754	0.428	-1.769	0.756	–

💡 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–	2.1	1.185	2.08	58	0.150	351	–	–
Liu et al.	2025	4.63	0.56	–	13	–	–	–	–
Hunt & Reffert	2024	2.10	1.19	2.08	57	–	351⁽¹⁾	–	–
Cavallo et al.	2024	2.01	1.18	–	79	0.150	–	–	–
Hunt & Reffert	2023	2.10	1.19	2.08	58	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
NGC 2311	4.4	104.45	-4.61	0.45	-1.31	1.0	32.11	0.9

💡 Note: The % column shows the percentage of members that HSC 1722 shares with each listed object.

Visualization

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