HSC 1798

0.16 UTI

0.0

C_N

0.06

C_dens

0.75

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 19

Stellar density (N₅₀/rad) 0.3 [N/pc²]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.06 Very loose
C_C3 0.75 High 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 1798 is a sparse, very loose object of high C3 quality. Its parallax locates it at a large^* distance, below 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.

(*): The parallax distance estimate (~5.93 kpc) differs significantly from the median photometric distance (~4.55 kpc).

⚠️ 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 Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Silver sample.

Data

🔍 Search references for HSC 1798 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–	105.281	-15.596	0.169	-0.521	1.621	–
Hunt & Reffert	2024	105.298	-15.617	0.159	-0.523	1.638	–
Cavallo et al.	2024	105.22	-15.587	0.159	–	–	–
Hunt & Reffert	2023	105.298	-15.617	0.159	-0.523	1.638	–

💡 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–	4.555	1.395	1.76	132	-0.100	292	–	–
Hunt & Reffert	2024	–	–	–	–	–	292⁽¹⁾	–	–
Cavallo et al.	2024	3.50	1.22	–	174	-0.100	–	–	–
Hunt & Reffert	2023	5.61	1.57	1.76	89	–	–	–	–

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

Visualization

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