HSC 1273

0.06 UTI

0.0

C_N

0.07

C_dens

0.12

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 20

Core radius and density 2.2 [pc], 0.3 [pc^-2]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.07 Very loose
C_C3 0.12 Very low quality
C_lit 0.06 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 1273 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate distance, well below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, 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.

Relatively close Low extinction Near-solar metallicity Very old

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.01 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.01 (50th percentile).

Data

🔍 Search references for HSC 1273 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–	60.141	34.775	0.366	0.486	-1.555	-14.198
Hu & Soubiran	2025	60.092	34.77	–	–	–	–
Hunt & Reffert	2024	60.203	34.722	0.361	0.429	-1.494	-4.939
Cavallo et al.	2024	60.092	34.77	0.36	–	–	–
Hunt & Reffert	2023	60.203	34.722	0.361	0.429	-1.494	-4.939

💡 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–	2.38	0.35	1.35	5585	-0.390	122	–	–
Hu & Soubiran	2025	–	–	–	–	-0.300⁽⁵⁾	–	–	–
Hunt & Reffert	2024	2.38	0.35	1.35	5585	–	122⁽¹⁾	–	–
Cavallo et al.	2024	2.73	0.78	–	7943	-0.480	–	–	–
Hunt & Reffert	2023	2.38	0.35	1.35	5585	–	–	–	–

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

Visualization

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