HXHWL 55

0.37 UTI

0.32

C_N

0.17

C_dens

0.75

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 32

Stellar density (N₅₀/rad) 0.9 [N/pc²]

C3 classification AB

C_N 0.32 Poorly populated
C_dens 0.17 Very loose
C_C3 0.75 High quality
C_lit 0.3 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HXHWL 55 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is poorly studied in the literature.

Relatively close Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HXHWL 55 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–	179.226	-71.004	0.761	-4.058	-0.624	8.995
Hu & Soubiran	2025	179.427	-71.034	–	–	–	–
Hunt & Reffert	2024	179.144	-71.02	0.756	-4.115	-0.622	8.348
Cavallo et al.	2024	179.427	-71.034	0.764	–	–	–
Hunt & Reffert	2023	179.144	-71.02	0.756	-4.115	-0.622	8.348
He et al.	2021	179.51	-70.991	0.73	-4.05	-0.69	–

💡 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–	1.26	0.56	0.43	205	-0.160	63	–	–
Hu & Soubiran	2025	–	–	–	–	-0.160⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	63⁽¹⁾	–	–
Cavallo et al.	2024	0.95	0.42	–	955	-0.440	–	–	–
Hunt & Reffert	2023	1.26	0.56	0.43	205	–	–	–	–
He et al.	2021	1.26	1.08	–	60	0.112	–	–	–

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

Visualization

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