HD 89998 (r Velorum) is a single star in the southern constellation of Vela. It is a faint star but visible to the naked eye with an apparent visual magnitude of 4.82. The distance to HD 89998, as determined from its annual parallax shift of , is 205 light years. The star is moving further from the Earth with a heliocentric radial velocity of +21 km/s, having come within some 1.552 million years ago.
This is an evolved giant star with a stellar classification of K1 III. The measured angular diameter of this star, after correcting for limb darkening, is . At the estimated distance of this star, this yields a physical size of 11.6 times the radius of the Sun. It is radiating 56 times the Sun's luminosity from its enlarged photosphere at en effective temperature of .
References The radius (R*) is given by: