HSC 749

0.11 UTI

0.25

C_N

0.09

C_dens

0.25

C_C3

0.25

C_lit

0.52

C_dup

N₅₀ (P>50% members) 25

Stellar density (N₅₀/rad) 0.5 [N/pc²]

C3 classification DB

C_N 0.25 Poorly populated
C_dens 0.09 Very loose
C_C3 0.25 Low quality
C_lit 0.25 Poorly studied
C_dup 0.52 Likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 749 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the absorption and age parameters (see Parameters). It was recently reported in the literature.

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

Very close Low extinction Near-solar metallicity Intermediate age

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 87 along with CWNU_1066.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as a moving group.

Data

🔍 Search references for HSC 749 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–	6.058	2.707	8.226	18.258	-14.783	12.493
Zhang et al.	2024	358.47	3.455	–	–	–	–
Cavallo et al.	2024	5.95	2.012	8.109	–	–	–
Hunt & Reffert	2023	358.47	3.455	8.128	18.061	-13.839	16.442

💡 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–	0.13	0.1	0.45	226	0.102	–	–	–
Liu et al.	2025	0.16	0.10	–	83	–	–	–	–
Zhang et al.	2024	–	–	–	–	0.034⁽¹⁾	–	–	–
Cavallo et al.	2024	0.13	0.50	–	309	0.170	–	–	–
Hunt & Reffert	2023	0.12	0.07	0.45	226	–	–	–	–

(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 1077	48.0	9.5	1.9	8.43	17.55	-14.39	15.68	0.17

💡 Note: The % column shows the percentage of members that HSC 749 shares with each listed object.

Visualization

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