HSC 187

0.45 UTI

0.31

C_N

0.7

C_dens

0.75

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 31

Stellar density (N₅₀/rad) 3.5 [N/pc²]

C3 classification AB

C_N 0.31 Poorly populated
C_dens 0.7 Moderately dense
C_C3 0.75 High 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 187 is a poorly populated, moderately dense object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a metal-rich, very young cluster, but with a large variance across recent sources for the absorption parameter (see Parameters). It was recently reported in the literature.

Relatively close Moderate extinction Metal-rich Very young

Liu et al. (2025)
Classified as primordial binary cluster 163 along with HXHWL_66, and of multiple system 47 along with OC_0028 and HXHWL_66.

Palma et al. (2025)
Part of multiple system G132, along with OC_0028, HXHWL_66 and HSC_184.

Cavallo et al. (2024)
Bronze sample.

Data

🔍 Search references for HSC 187 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–	273.229	-14.474	0.587	0.186	-1.927	12.159
Liu et al.	2025	273.25	-14.47	0.58	0.16	-1.9	12.16
Hunt & Reffert	2024	273.25	-14.467	0.584	0.156	-1.9	12.164
Cavallo et al.	2024	273.237	-14.468	0.583	–	–	–
Hunt & Reffert	2023	273.25	-14.467	0.584	0.156	-1.9	12.164

💡 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–	1.65	1.69	2.43	4	0.820	436	–	–
Liu et al.	2025	1.16	0.01	–	3	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	436⁽¹⁾	–	–
Cavallo et al.	2024	1.69	1.69	–	10	0.820	–	–	–
Hunt & Reffert	2023	1.65	2.39	2.43	4	–	–	–	–

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

Visualization

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