HSC 1825

0.15 UTI

0.0

C_N

0.02

C_dens

0.75

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 17

Stellar density (N₅₀/rad) 0.1 [N/pc²]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.02 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 1825 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 metal-poor, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It was recently reported in the literature.

(*): The parallax distance estimate (~8.88 kpc) differs significantly from the median photometric distance (~5.97 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.

Very distant Moderate extinction Metal-poor Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 1825 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–	107.767	-17.601	0.113	-0.636	1.124	–
Hunt & Reffert	2024	107.773	-17.606	0.113	-0.595	1.136	–
Cavallo et al.	2024	107.712	-17.588	0.115	–	–	–
Hunt & Reffert	2023	107.773	-17.606	0.113	-0.595	1.136	–

💡 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–	5.97	1.405	1.46	143	-0.560	115	–	–
Hunt & Reffert	2024	–	–	–	–	–	115⁽¹⁾	–	–
Cavallo et al.	2024	4.35	1.77	–	32	-0.560	–	–	–
Hunt & Reffert	2023	7.59	1.04	1.46	254	–	–	–	–

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

Visualization

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