HSC 681

0.23 UTI

0.27

C_N

0.74

C_dens

0.12

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 27

Stellar density (N₅₀/rad) 3.7 [N/pc²]

C3 classification DC

C_N 0.27 Poorly populated
C_dens 0.74 Moderately dense
C_C3 0.12 Very low quality
C_lit 0.0 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 681 is a poorly populated, moderately dense object of very low C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.

⚠️ 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.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 681 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–	310.267	48.211	0.42	-0.608	-2.203	7.706
Hunt & Reffert	2024	310.254	48.206	0.41	-0.609	-2.155	–
Cavallo et al.	2024	310.268	48.225	0.414	–	–	–
Hunt & Reffert	2023	310.254	48.206	0.41	-0.609	-2.155	–

💡 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–	2.37	1.93	2.34	148	0.440	238	–	–
Hunt & Reffert	2024	–	–	–	–	–	238⁽¹⁾	–	–
Cavallo et al.	2024	2.49	1.73	–	95	0.440	–	–	–
Hunt & Reffert	2023	2.25	2.13	2.34	201	–	–	–	–

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

Visualization

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