HSC 2099

0.18 UTI

0.0

C_N

0.45

C_dens

0.38

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 24

Core radius and density 1.0 [pc], 2.3 [pc^-2]

C3 classification CB

C_N 0.0 Sparse
C_dens 0.45 Loose
C_C3 0.38 Low 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 2099 is a sparse, loose object of low C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It was recently reported in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Moderate extinction Near-solar metallicity Very young

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.41 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.41 (50th percentile).

Data

🔍 Search references for HSC 2099 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–	130.449	-41.638	0.65	-5.457	4.536	127.697
Hunt & Reffert	2024	130.445	-41.632	0.662	-5.491	4.62	127.694
Cavallo et al.	2024	130.473	-41.65	0.653	–	–	–
Hunt & Reffert	2023	130.445	-41.632	0.662	-5.491	4.62	127.694

💡 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–	1.49	2.94	1.87	8	-0.110	95	–	–
Hunt & Reffert	2024	1.49	2.94	1.87	8	–	95⁽¹⁾	–	–
Cavallo et al.	2024	1.83	3.51	–	8	-0.110	–	–	–
Hunt & Reffert	2023	1.49	2.94	1.87	8	–	–	–	–

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

Visualization

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