HSC 675

0.05 UTI

0.0

C_N

0.01

C_dens

0.25

C_C3

0.0

C_lit

0.96

C_dup

N₅₀ (P>50% members) 17

Stellar density (N₅₀/rad) 0.1 [N/pc²]

C3 classification CC

C_N 0.0 Sparse
C_dens 0.01 Very loose
C_C3 0.25 Low quality
C_lit 0.0 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 675 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (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.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.96) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Very distant Moderate extinction Massive Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Wood sample.

Data

🔍 Search references for HSC 675 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–	315.722	44.768	0.105	-2.602	-3.329	-86.789
Hunt & Reffert	2024	315.711	44.764	0.107	-2.596	-3.344	-86.906
Cavallo et al.	2024	315.743	44.753	0.107	–	–	–
Hunt & Reffert	2023	315.711	44.764	0.107	-2.596	-3.344	-86.906

💡 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–	7.725	2.54	2.19	458	-0.020	1221	–	–
Hunt & Reffert	2024	–	–	–	–	–	1221⁽¹⁾	–	–
Cavallo et al.	2024	7.14	1.46	–	813	-0.020	–	–	–
Hunt & Reffert	2023	8.31	3.62	2.19	104	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
FSR 0273	4.0	315.39	44.81	0.18	-2.58	-3.46	-59.07	0.17

💡 Note: The % column shows the percentage of members that HSC 675 shares with each listed object.

Visualization

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