HSC 1685

0.05 UTI

0.0

C_N

0.04

C_dens

0.25

C_C3

0.0

C_lit

0.96

C_dup

C3 classification CC

Number of members (P>50%) 19

Radius (P>50% members) 6.5 [arcmin]

C_N 0.0 Sparse
C_dens 0.04 Very 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 1685 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It was recently reported in the literature.

(*): The parallax distance estimate (~5.46 kpc) differs significantly from the median photometric distance (~4.07 kpc).

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.

Distant Moderate extinction Near-solar metallicity Young

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for HSC 1685 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	–	103.308	-0.638	0.183	-0.195	0.603	59.723
Hunt & Reffert	2024	103.306	-0.657	0.199	-0.238	0.624	–
Cavallo et al.	2024	103.355	-0.588	0.198	–	–	–
Hunt & Reffert	2023	103.306	-0.657	0.199	-0.238	0.624	–

💡 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
Hunt & Reffert	2024	–	–	–	–	–	158*	–	–
Cavallo et al.	2024	3.77	1.79	–	76	0.120	–	–	–
Hunt & Reffert	2023	4.37	1.85	1.57	48	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 2058	4.0	103.43	-0.49	0.2	-0.38	0.49	78.49	0.03

💡 Note: The % column shows the percentage of members that HSC 1685 shares with each listed object.

Visualization

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