HSC 2864

0.39 UTI

0.75

C_N

0.4

C_dens

0.75

C_C3

0.03

C_lit

1.0

C_dup

N₅₀ (P>50% members) 104

Stellar density (N₅₀/rad) 2.0 [N/pc²]

C3 classification AB

C_N 0.75 Rich
C_dens 0.4 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

ℹ️

HSC 2864 is a rich, loose object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by very high extinction. It is catalogued as a massive, 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.

Distant Very high extinction Massive Near-solar metallicity Intermediate age

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P22, along with FSR_1750.

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.06 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.06 (50th percentile).

Data

🔍 Search references for HSC 2864 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	256.29	-39.108	0.247	-1.413	-2.615	-34.139
Hunt & Reffert	2024	256.287	-39.091	0.25	-1.404	-2.596	-36.255
Cavallo et al.	2024	256.275	-39.055	0.25	–	–	–
Hunt & Reffert	2023	256.287	-39.091	0.25	-1.404	-2.596	-36.255

💡 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–	3.57	5.495	2.88	415	0.010	4327	–	–
Hunt & Reffert	2024	–	–	–	–	–	4327⁽¹⁾	–	–
Cavallo et al.	2024	3.82	5.55	–	162	0.010	–	–	–
Hunt & Reffert	2023	3.32	5.44	2.88	668	–	–	–	–

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

Visualization

ℹ️

1 2