HXHWL 28

0.51 UTI

0.56

C_N

0.98

C_dens

0.5

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 61

Stellar density (N₅₀/rad) 4.9 [N/pc²]

C3 classification BB

C_N 0.56 Moderately populated
C_dens 0.98 Very dense
C_C3 0.5 Intermediate 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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HXHWL 28 is a moderately populated, very dense object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is poorly studied in the literature.

Note: This object shares a large percentage of members with 3 later reported entries. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Young

Palma et al. (2025)
Classified as optical pair P536, along with UBC_163.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HXHWL 28 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–	330.474	56.029	0.642	-2.008	-1.659	34.448
Hunt & Reffert	2024	330.472	56.027	0.63	-2.006	-1.687	34.459
Cavallo et al.	2024	330.468	56.037	0.635	–	–	–
Hunt & Reffert	2023	330.472	56.027	0.63	-2.006	-1.687	34.459
He et al.	2021	330.483	56.032	0.64	-2.01	-1.63	–

💡 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–	1.51	2.47	1.74	70	0.403	321	–	–
Hunt & Reffert	2024	–	–	–	–	–	321⁽¹⁾	–	–
Cavallo et al.	2024	1.71	2.47	–	50	0.230	–	–	–
Hunt & Reffert	2023	1.51	1.97	1.74	70	–	–	–	–
He et al.	2021	1.45	2.64	–	83	0.575	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 1154	86.9	330.47	56.04	0.64	-2.0	-1.67	34.45	0.01
CWWDL 14210	75.4	330.47	56.05	0.64	-1.98	-1.7	34.45	0.13
CWWDL 13945	65.6	330.47	56.03	0.64	-2.0	-1.67	34.45	0.0

💡 Note: The % column shows the percentage of members that HXHWL 28 shares with each listed object.

Visualization

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