HSC 1889

0.26 UTI

0.3

C_N

0.17

C_dens

0.75

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 30

Core radius and density 1.5 [pc], 0.8 [pc^-2]

C3 classification AB

C_N 0.3 Poorly populated
C_dens 0.17 Very loose
C_C3 0.75 High quality
C_lit 0.03 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 1889 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.

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

Relatively close Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for HSC 1889 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–	121.669	-17.361	0.911	-3.24	1.571	27.702
Hunt & Reffert	2024	121.715	-17.398	0.922	-3.247	1.602	26.375
Cavallo et al.	2024	121.677	-17.32	0.917	–	–	–
Hunt & Reffert	2023	121.715	-17.398	0.922	-3.247	1.602	26.375

💡 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–	1.02	0.08	0.26	272	0.320	74	–	–
Hunt & Reffert	2024	1.02	0.08	0.26	272	–	74⁽¹⁾	–	–
Cavallo et al.	2024	1.07	0.01	–	389	0.320	–	–	–
Hunt & Reffert	2023	1.02	0.08	0.26	272	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 3041	93.3	121.67	-17.36	0.91	-3.24	1.57	30.75	0.0

💡 Note: The % column shows the percentage of members that HSC 1889 shares with each listed object.

Visualization

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