HSC 135

0.54 UTI

0.43

C_N

1.0

C_dens

0.75

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 43

Stellar density (N₅₀/rad) 6.2 [N/pc²]

C3 classification AB

C_N 0.43 Poorly populated
C_dens 1.0 Very 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 135 is a poorly populated, very dense object of high 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 age parameter (see Parameters). It was recently reported in the literature.

Relatively close Moderate extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 160 along with CWNU_1630, and of multiple system 39 along with HSC_143 and CWNU_1630.

Palma et al. (2025)
Part of multiple system G70, along with HSC_143, Dias_5 and CWNU_1630.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 135 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–	271.75	-19.785	0.751	2.778	-0.859	-29.612
Liu et al.	2025	271.74	-19.76	0.74	2.78	-0.83	-21.73
Hunt & Reffert	2024	271.739	-19.764	0.743	2.781	-0.826	-21.73
Cavallo et al.	2024	271.775	-19.765	0.743	–	–	–
Hunt & Reffert	2023	271.739	-19.764	0.743	2.781	-0.826	-21.73

💡 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–	1.28	1.25	2.28	91	-0.240	217	–	–
Liu et al.	2025	2.82	0.61	–	56	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	217⁽¹⁾	–	–
Cavallo et al.	2024	1.14	1.25	–	457	-0.240	–	–	–
Hunt & Reffert	2023	1.28	1.35	2.28	91	–	–	–	–

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

Visualization

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