HSC 2581

0.48 UTI

0.41

C_N

1.0

C_dens

1.0

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 41

Stellar density (N₅₀/rad) 23.3 [N/pc²]

C3 classification AA

C_N 0.41 Poorly populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.0 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 2581 is a poorly populated, very dense object of very high C3 quality. Its parallax locates it at a large^* distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It was recently reported in the literature.

(*): The parallax distance estimate (~5.07 kpc) differs significantly from the median photometric distance (~3.60 kpc).

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

Distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 2581 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–	200.999	-63.202	0.197	-5.894	-0.847	–
Hunt & Reffert	2024	201.007	-63.203	0.2	-5.924	-0.852	-42.21
Cavallo et al.	2024	201.019	-63.198	0.2	–	–	–
Hunt & Reffert	2023	201.007	-63.203	0.2	-5.924	-0.852	-42.21

💡 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–	3.6	2.25	2.37	207	-0.340	971	–	–
Hunt & Reffert	2024	–	–	–	–	–	971⁽¹⁾	–	–
Cavallo et al.	2024	2.55	2.24	–	380	-0.340	–	–	–
Hunt & Reffert	2023	4.65	2.26	2.37	34	–	–	–	–

(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 2952	90.2	201.01	-63.2	0.2	-5.89	-0.86	-49.51	0.1

💡 Note: The % column shows the percentage of members that HSC 2581 shares with each listed object.

Visualization

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