HSC 2644

0.04 UTI

0.0

C_N

0.06

C_dens

0.12

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 16

Stellar density (N₅₀/rad) 0.3 [N/pc²]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.06 Very loose
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 2644 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by low extinction. It is catalogued as a very old 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.

Distant Low extinction Very old

Data

🔍 Search references for HSC 2644 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–	219.4	-66.539	0.294	-7.35	-4.299	67.874
Hunt & Reffert	2024	219.36	-66.484	0.276	-7.346	-4.282	–
Hunt & Reffert	2023	219.36	-66.484	0.276	-7.346	-4.282	–

💡 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–	3.28	0.82	0.31	8395	–	476	–	–
Hunt & Reffert	2024	–	–	–	–	–	476⁽¹⁾	–	–
Hunt & Reffert	2023	3.28	0.82	0.31	8395	–	–	–	–

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

Visualization

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