HSC 2281

0.25 UTI

0.67

C_N

0.08

C_dens

0.75

C_C3

0.03

C_lit

0.8

C_dup

N_m (P>50%) 84

Core radius and density 2.5 [pc], 0.4 [pc^-2]

C3 classification AB

C_N 0.67 Moderately populated
C_dens 0.08 Very loose
C_C3 0.75 High quality
C_lit 0.03 Rarely studied
C_dup 0.8 Very likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 2281 is a moderately populated, very loose object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.

Note: This is very likely a unique object, which shares a small percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.95 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.95 (50th percentile).

Data

🔍 Search references for HSC 2281 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–	149.289	-56.13	0.396	-5.614	3.14	21.072
Hunt & Reffert	2024	149.274	-56.046	0.387	-5.598	3.124	23.841
Cavallo et al.	2024	149.236	-56.131	0.389	–	–	–
Hunt & Reffert	2023	149.274	-56.046	0.387	-5.598	3.124	23.841

💡 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–	2.3	1.77	2.67	114	-0.200	331	–	–
Hunt & Reffert	2024	2.30	1.77	2.67	114	–	331⁽¹⁾	–	–
Cavallo et al.	2024	2.28	2.12	–	151	-0.200	–	–	–
Hunt & Reffert	2023	2.30	1.77	2.67	114	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 1472	20.2	149.29	-56.04	0.39	-5.81	3.25	6.9	0.16

💡 Note: The % column shows the percentage of members that HSC 2281 shares with each listed object.

Visualization

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