HSC 2904

0.26 UTI

0.0

C_N

0.22

C_dens

1.0

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 23

Core radius and density 1.1 [pc], 1.1 [pc^-2]

C3 classification AA

C_N 0.0 Sparse
C_dens 0.22 Very loose
C_C3 1.0 Very 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 2904 is a sparse, very loose object of very high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by high extinction. It is catalogued as a metal-rich, young cluster (see Parameters). It was recently reported in the literature.

Relatively close High extinction Metal-rich Young

Palma et al. (2025)
Classified as optical pair P368, along with CWNU_32.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Data

🔍 Search references for HSC 2904 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–	262.215	-36.986	0.542	-0.502	-0.624	41.183
Hunt & Reffert	2024	262.24	-36.977	0.535	-0.505	-0.64	–
Cavallo et al.	2024	262.175	-36.965	0.538	–	–	–
Hunt & Reffert	2023	262.24	-36.977	0.535	-0.505	-0.64	–

💡 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–	1.75	3.61	1.83	23	0.560	329	–	–
Hunt & Reffert	2024	1.75	3.61	1.83	23	–	329⁽¹⁾	–	–
Cavallo et al.	2024	1.83	3.44	–	54	0.560	–	–	–
Hunt & Reffert	2023	1.75	3.61	1.83	23	–	–	–	–

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

Visualization

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