Ryu 400 is a sparse, loose object of very low C3 quality. Its parallax locates it at a moderate distance, above 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 (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	–	255.757	-37.525	0.301	-3.347	-2.644	-39.308
Bica et al.	2019	255.779	-37.522	–	–	–	–

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