Ryu 155

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0.16 UTI
0.37
CN
0.17
Cdens
0.25
CC3
0.0
Clit
1.0
Cdup
C3 classification DB
Number of members (P>50%) 37
Radius (P>50% members) 2.2 [arcmin]
  • CN 0.37 Poorly populated
  • Cdens 0.17 Very loose
  • CC3 0.25 Low quality
  • Clit 0.0 Rarely studied
  • Cdup 1.0 Unique
📥 Members 📊 Colab 🔬 Bayestar19 🔍 SciX 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview
Ryu 155 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a very large distance, well below the mid-plane. No fundamental parameter values are available for this object. It is rarely studied in the literature, with no articles listed in the last 7 years.

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

No fundamental parameters

Data
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 270.548 -29.767 0.098 -4.658 -5.477 3.592
Bica et al. 2019 270.547 -29.78 – – – –

💡 Note: The UCC values are estimated from its identified members.

Visualization
Ryu 155 UCC
Galactocentric position diagram

💡 Note: How are the galactocentric plots generated? See FAQ.