HSC 1185

0.23 UTI

0.25

C_N

0.16

C_dens

0.62

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 25

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

C3 classification AC

C_N 0.25 Poorly populated
C_dens 0.16 Very loose
C_C3 0.62 Intermediate quality
C_lit 0.06 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 1185 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (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.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

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 1185 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–	53.327	49.577	0.973	-2.439	-2.644	-22.803
Zhang et al.	2024	53.289	49.57	–	–	–	–
Hunt & Reffert	2024	53.289	49.57	0.958	-2.392	-2.68	-22.04
Cavallo et al.	2024	53.4	49.466	0.962	–	–	–
Hunt & Reffert	2023	53.289	49.57	0.958	-2.392	-2.68	-22.04

💡 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–	0.98	1.0	0.65	239	0.107	70	–	–
Zhang et al.	2024	–	–	–	–	-0.056⁽¹⁾	–	–	–
Hunt & Reffert	2024	0.98	1.00	0.65	239	–	70⁽¹⁾	–	–
Cavallo et al.	2024	1.11	1.22	–	234	0.270	–	–	–
Hunt & Reffert	2023	0.98	1.00	0.65	239	–	–	–	–

(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 3578	84.0	53.26	49.62	0.97	-2.44	-2.65	-22.8	0.04

💡 Note: The % column shows the percentage of members that HSC 1185 shares with each listed object.

Visualization

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