SAI 31 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, above the mid-plane, affected by low extinction. It is catalogued as an old cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 7 years.

(*): The parallax distance estimate (~8.21 kpc) differs significantly from the median photometric distance (~2.65 kpc).

⚠️ 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	–	57.839	58.771	0.122	-0.246	0.791	-67.665
Bica et al.	2019	57.816	58.766	–	–	–	–
Glushkova et al.	2010	57.814	58.769	–	–	–	–

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