(155997) Robertaciani Main-belt Asteroid

Discovered on 12 September 2001 by A. Boattini M. Tombelli at San Marcello.

Roberta Ciani (b. 1971) is an Italian amateur astronomer who has been a member of the Gruppo Astrofili Montelupo since 2019. She is a writer of astronomy-themed poems and a theater actress. Roberta is passionate about constellations and mythology.Naming citation (WGSBN Bull. 6, #8, 10), IAU / Minor Planet Center, via NASA/JPL

Where Robertaciani is today

Seen from above the solar system on 2026-10-14: Robertaciani is 2.72 au from the Sun and 3.41 au from Earth. Computed from JPL's orbital elements.

Facts

Number	155997
Provisional designation	2001 RP16
Orbit class	Main-belt Asteroid
Diameter	3.92 km (#12,959 largest of 17,440 named asteroids with a measured size)
Albedo	0.0660
Absolute magnitude (H)	16.05
Orbital period	3.75 years
Semi-major axis	2.41 au
Perihelion – aphelion	2.09 – 2.74 au
Eccentricity	0.134
Inclination	10.9°
Closest distance between its orbit and Earth's (MOID)	1.12 au

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

Also named after someone called Roberta

All asteroids named after someone called Roberta

Also discovered on 12 September 2001

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