Dias 87

0.06 UTI

0.0

C_N

0.09

C_dens

0.25

C_C3

0.0

C_lit

0.96

C_dup

N₅₀ (P>50% members) 16

Stellar density (N₅₀/rad) 0.4 [N/pc²]

C3 classification DB

C_N 0.0 Sparse
C_dens 0.09 Very loose
C_C3 0.25 Low quality
C_lit 0.0 Rarely studied
C_dup 0.96 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Dias 87 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, very 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.

Distant High extinction Near-solar metallicity Very young

Data

🔍 Search references for Dias 87 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–	272.168	-21.112	0.282	-0.244	-1.844	27.716
Dias et al.	2026	272.166	-21.123	0.282	-0.26	-1.858	–

💡 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–	3.19	3.34	–	7	0.189	–	–	–
Dias et al.	2026	3.19	3.34	–	7	0.189	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Ryu 638	4.0	272.33	-21.28	0.32	-0.36	-1.7	-5.56	0.22

💡 Note: The % column shows the percentage of members that Dias 87 shares with each listed object.

Visualization

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