HSC 1838

0.36 UTI

0.54

C_N

0.53

C_dens

0.25

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 58

Stellar density (N₅₀/rad) 2.7 [N/pc²]

C3 classification DB

C_N 0.54 Moderately populated
C_dens 0.53 Moderately dense
C_C3 0.25 Low quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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HSC 1838 is a moderately populated, moderately dense object of low C3 quality. Its parallax locates it at a moderate distance, near 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.

Note: This object shares a significant percentage of members with a later reported entry. See table with shared members information.

Distant Moderate extinction Near-solar metallicity Intermediate age

Palma et al. (2025)
Classified as optical pair P389, along with FSR_1252.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 1838 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–	111.037	-17.916	0.249	-0.576	0.349	51.957
Hu & Soubiran	2025	111.041	-17.923	–	–	–	–
Hunt & Reffert	2024	111.014	-17.945	0.264	-0.611	0.378	59.466
Cavallo et al.	2024	111.041	-17.923	0.265	–	–	–
Hunt & Reffert	2023	111.014	-17.945	0.264	-0.611	0.378	59.466

💡 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–	3.155	2.03	1.9	472	-0.275	223	–	–
Hu & Soubiran	2025	–	–	–	–	-0.280⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	223⁽¹⁾	–	–
Cavallo et al.	2024	3.03	2.32	–	589	-0.270	–	–	–
Hunt & Reffert	2023	3.28	1.74	1.90	356	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 2939	62.1	111.04	-17.91	0.26	-0.57	0.32	57.38	0.01

💡 Note: The % column shows the percentage of members that HSC 1838 shares with each listed object.

Visualization

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