Discovered by H. van Gent MPC designation 1132 Hollandia Discovered 13 September 1929 Orbits Sun Discovery site Union Observatory | Discovery date 13 September 1929 Minor planet category main-belt · (middle) Absolute magnitude 11.1 Discoverer Hendrik van Gent Asteroid group Asteroid belt | |
Named after Holland (part of The Netherlands) Alternative names 1929 RB1 · 1942 NC
1946 JA · 1951 WA Similar 1102 Pepita, 1111 Reinmuthia, 1002 Olbersia, 1001 Gaussia, 107 Camilla | ||
1132 Hollandia, provisional designation 1929 RB1, is a stony asteroid from the middle region of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 13 September 1929, by Dutch astronomer Hendrik van Gent at Leiden Southern Station, annex to the Johannesburg Observatory in South Africa.
Hollandia is an assumed stony S-type asteroid. It orbits the Sun at a distance of 1.9–3.4 AU once every 4 years and 5 months (1,609 days). Its orbit has an eccentricity of 0.27 and an inclination of 7° with respect to the ecliptic. The body's observation arc begins with its official discovery observation as no precoveries were taken and no prior identifications were made.
Between 2003 and 2014, three rotational lightcurves of Hollandia were obtained from photometric observations taken by French amateur astronomer René Roy, Jason Sauppe at Oakley Observatory and Maurice Clark at TTU's Preston Gott Observatory. Lightcurve analysis gave a rotation period between 5.360 and 5.568 hours with a brightness variation of 0.15–0.35 magnitude (U=2+/2+/2+).
According to the surveys carried out by the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Hollandia measures between 20.48 and 27.727 kilometers in diameter, and its surface has an albedo between 0.086 and 0.135. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10 – a compromise value that lies in between the albedos for carbonaceous (0.057) and for stony (0.20) asteroids – and calculates a diameter of 25.32 kilometers using an absolute magnitude of 11.1.
This minor planet was named after the Latin name for Holland, a region in the Netherlands. Naming citation was first published by Paul Herget in The Names of the Minor Planets in 1955 (H 106).