HSC 2399

0.16 UTI

0.26

C_N

0.34

C_dens

0.25

C_C3

0.0

C_lit

0.96

C_dup

C3 classification CC

Number of members (P>50%) 26

Radius (P>50% members) 171.4 [arcmin]

C_N 0.26 Poorly populated
C_dens 0.34 Loose
C_C3 0.25 Low quality
C_lit 0.0 Rarely studied
C_dup 0.96 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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HSC 2399 is a poorly populated, loose object of low C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It was recently reported in the literature.

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

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.96) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Very close Low extinction Near-solar metallicity Young

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as a moving group.

Data

🔍 Search references for HSC 2399 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	–	147.135	-73.681	12.799	-31.554	34.243	15.309
Cavallo et al.	2024	140.612	-72.984	12.706	–	–	–
Hunt & Reffert	2023	142.232	-73.779	12.706	-30.657	33.088	16.192

💡 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]	Bfr	BSS
Cavallo et al.	2024	0.08	0.75	–	31	-0.290	–	–	–
Hunt & Reffert	2023	0.08	1.18	1.17	160	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OCSN 88	3.8	141.23	-64.97	11.27	-32.0	41.95	23.59	0.46

💡 Note: The % column shows the percentage of members that HSC 2399 shares with each listed object.

Visualization

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