HXHWL 18

(H21OC 18)

0.37 UTI

0.32

C_N

0.33

C_dens

0.5

C_C3

0.35

C_lit

1.0

C_dup

N₅₀ (P>50% members) 32

Stellar density (N₅₀/rad) 1.6 [N/pc²]

C3 classification BB

C_N 0.32 Poorly populated
C_dens 0.33 Loose
C_C3 0.5 Intermediate quality
C_lit 0.35 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 18 is a poorly populated, loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low 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.

Relatively close Low extinction Near-solar metallicity Young

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HXHWL 18 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–	74.284	39.575	0.957	-0.456	-3.099	-9.207
Zhang et al.	2024	74.317	39.796	–	–	–	–
Hunt & Reffert	2024	74.317	39.796	0.956	-0.53	-3.058	-9.6
Cavallo et al.	2024	74.31	39.6	0.958	–	–	–
Hunt & Reffert	2023	74.317	39.796	0.956	-0.53	-3.058	-9.6
He et al.	2022	74.309	39.627	0.958	-0.49	-3.105	–
He et al.	2021	74.319	39.594	0.95	-0.4	-3.05	–

💡 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–	1.0	1.0	0.57	52	0.180	82	–	–
Zhang et al.	2024	–	–	–	–	-0.142⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	82⁽¹⁾	–	–
Cavallo et al.	2024	1.00	0.92	–	79	0.180	–	–	–
Hunt & Reffert	2023	1.00	0.76	0.57	69	–	–	–	–
He et al.	2022	–	1.15	–	32	–	–	–	–
He et al.	2021	0.95	1.08	–	35	0.223	–	–	–

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

Visualization

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