HSC 1638

0.02 UTI

0.66

C_N

0.31

C_dens

0.75

C_C3

0.03

C_lit

0.05

C_dup

N_m (P>50%) 82

Core radius and density 1.8 [pc], 1.6 [pc^-2]

C3 classification AB

C_N 0.66 Moderately populated
C_dens 0.31 Loose
C_C3 0.75 High quality
C_lit 0.03 Rarely studied
C_dup 0.05 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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HSC 1638 is a moderately populated, loose object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.

⚠️ Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

Distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for HSC 1638 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–	101.887	5.63	0.24	-0.639	-0.284	71.314
Hunt & Reffert	2024	101.889	5.631	0.243	-0.634	-0.296	58.24
Cavallo et al.	2024	101.893	5.627	0.237	–	–	–
Hunt & Reffert	2023	101.889	5.631	0.243	-0.634	-0.296	58.24

💡 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–	3.4	1.37	2.37	213	0.170	589	–	–
Hunt & Reffert	2024	3.40	1.37	2.37	213	–	589⁽¹⁾	–	–
Cavallo et al.	2024	3.45	1.61	–	65	0.170	–	–	–
Hunt & Reffert	2023	3.40	1.37	2.37	213	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
FoF 1390	95.1	101.89	5.63	0.24	-0.63	-0.29	71.31	0.37
CWWDL 10880	81.7	101.9	5.64	0.24	-0.63	-0.28	93.37	0.05

💡 Note: The % column shows the percentage of members that HSC 1638 shares with each listed object.

Visualization

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