(8558) Hack Main-belt Asteroid

Discovered on 1 August 1995 by Tesi, L., Boattini, A. at San Marcello.

Named in honor of Margherita Hack (b. 1922), director of the Trieste Astronomical Observatory (1964-1987), director of the astronomy department of Trieste University (1985-1991 and 1996-1997) and a former president of IAU Commission 29. Although her studies have ranged from optics and solar physics to radioastronomy (galactic 21-cm emission), her main fields of research remain stellar spectroscopy, stellar atmospheres and observable effects of stellar evolution. Her present interests are the ultraviolet and optical spectroscopy of close interacting binaries, atmospheric eclipsing binaries and symbiotic stars.Naming citation (19980808/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL

Where Hack is today

Seen from above the solar system on 2026-10-14: Hack is 3.75 au from the Sun and 4.72 au from Earth. Computed from JPL's orbital elements.

Facts

Number	8558
Provisional designation	1995 PC
Orbit class	Main-belt Asteroid
Diameter	7.67 km (#6,922 largest of 17,440 named asteroids with a measured size)
Albedo	0.0520
Absolute magnitude (H)	14.62
Orbital period	5.49 years
Semi-major axis	3.11 au
Perihelion – aphelion	2.42 – 3.81 au
Eccentricity	0.223
Inclination	0.278°
Closest distance between its orbit and Earth's (MOID)	1.41 au

Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.

More named asteroids discovered by Tesi, L., Boattini, A.

All 37

← (8557) Saroun · (8560) Tsubaki →