HSC 2798

0.33 UTI

0.42

C_N

0.17

C_dens

1.0

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 42

Core radius and density 2.3 [pc], 0.8 [pc^-2]

C3 classification AA

C_N 0.42 Poorly populated
C_dens 0.17 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 2798 is a poorly populated, very loose object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, young cluster (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.

Distant High extinction Massive Near-solar metallicity Young

Palma et al. (2025)
Classified as optical pair P488, along with HSC_2794.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 0.09 (50th percentile), true positive? (human-assigned).

Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.09 (50th percentile), true positive? (human-assigned).

Data

🔍 Search references for HSC 2798 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–	248.81	-46.169	0.219	-2.732	-3.391	-82.894
Hunt & Reffert	2024	248.809	-46.18	0.218	-2.719	-3.364	–
Cavallo et al.	2024	248.801	-46.17	0.218	–	–	–
Hunt & Reffert	2023	248.809	-46.18	0.218	-2.719	-3.364	–

💡 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–	3.88	4.68	2.665	39	-0.210	2636	–	–
Hunt & Reffert	2024	3.88	4.68	2.66	39	–	2636⁽¹⁾	–	–
Cavallo et al.	2024	3.34	4.68	–	18	-0.210	–	–	–
Hunt & Reffert	2023	3.88	4.68	2.67	39	–	–	–	–

(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 4040	88.1	248.82	-46.15	0.23	-2.73	-3.42	–	0.14

💡 Note: The % column shows the percentage of members that HSC 2798 shares with each listed object.

Visualization

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