1627 Ivar, provisional designation 1929 SH, is a stony asteroid and near-Earth object of the Amor group, approximately 9 kilometers in diameter. It was discovered on 25 September 1929, by Danish astronomer Ejnar Hertzsprung at Leiden Southern Station, the S-type asteroid orbits the Sun at a distance of 1. 1–2.6 AU once every 2 years and 6 months. Its orbit has an eccentricity of 0.40 and an inclination of 8° with respect to the ecliptic, ivars observation arc begins with its official discovery observation in 1929, as no precoveries were taken, and no prior identifications were made. It has an Earth minimum orbit intersection distance of 0.1124 AU, the eccentric Amor asteroid is a Mars-crosser. In 2074, it will pass Earth at 0.141 AU, a large number of rotational light-curves of Ivar have been obtained from photometric observations since 1985. They give a rotation period between 4.795 and 4.80 hours with a brightness variation between 0.27 and 1.16 magnitude, indicative of its non-spheroidal shape.
Future photometric observations will show whether the YORP effect will slowly change the spin rate. In 1985, the body was observed with radar from the Arecibo Observatory in Puerto Rico at a distance of 0.20 AU. The measured radar cross-section was 7.5 square kilometers.37 and 10.2 kilometers in diameter, the Collaborative Asteroid Lightcurve Link adopts an albedo of 0.151 and a diameter of 9.12 kilometers with an absolute magnitude of 12.87. This minor planet was named by the discoverer in honor of his late brother Ivar Hertzsprung, naming citation was published before November 1977
2839 Annette, provisional designation 1929 TP, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 5 October 1929, by American astronomer Clyde Tombaugh at Lowell Observatory during his search for Pluto and it was named after the discoverers daughter. Annette is a S-type asteroid and member of the Flora family and it orbits the Sun at a distance of 1. 9–2.5 AU once every 3 years and 4 months. Its orbit has an eccentricity of 0.15 and an inclination of 5° with respect to the ecliptic, due to a precovery taken at Lowell Observatory, the bodys observation arc was extended by 4 days prior to its official discovery observation. The first rotational lightcurve of Annette was obtained by American astronomer Brian Warner at his Palmer Divide Observatory, Colorado and it gave a rotation period of 10.457 hours with a brightness variation of 0.92 magnitude. In November 2006, a second lightcurve by astronomer Robert Buchheim at Altimira Observatory in southern California gave a period of 10.4595 hours.
He noted a significantly fainter absolute magnitude of 14.35 than previously reported and this minor planet was named after Clyde Tombaughs daughter, Annette. Naming citation was published on 22 June 1986, lightcurve plot of 2839 Annette, Palmer Divide Observatory, B
1126 Otero, provisional designation 1929 AC, is a rare-type Florian asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 11 January 1929, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany and it was named after Spanish courtesan Carolina Otero. Otero is a rare A-type asteroid and member of the Flora family and it orbits the Sun at a distance of 1. 9–2.6 AU once every 3 years and 5 months. Its orbit has an eccentricity of 0.15 and an inclination of 7° with respect to the ecliptic and it was first identified as 1926 GD at Uccle/Heidelberg in 1926, extending the asteroids observation arc by 3 years prior to its official discovery at Heidelberg. Two rotational lightcurve of Otero were obtained from observations by astronomers Petr Pravec. Lightcurve analysis gave a concurring, well-defined rotation period of 3.648 hours with a variation of 0.69 and 0.70 magnitude. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1994 and this minor planet was named by the discoverer for Galician-born Spanish courtesan and actress Carolina Otero, who was known as La Belle Otero.
During the Belle Époque, she was the most sought after woman in all of Europe and led an excessive life thanks to her numerous rich and famous lovers
1148 Rarahu is a main belt asteroid orbiting the Sun. Approximately 33 kilometers in diameter, it makes a revolution around the Sun once every 5 years and it completes one rotation once every 6 hours. It was discovered by Alexander Nikolaevich Deutsch on July 5,1929, on July 28, it was independently discovered by Cyril V. Jackson and H. E. Rarahu is the Tahitian name for a girl, taken from the novel Le mariage de Loti by Louis Marie Julien Viaud, pierre Loti. The asteroids provisional name was 1929 NA.1148 Rarahu at the JPL Small-Body Database Discovery · Orbit diagram · Orbital elements · Physical parameters
An astronomical object or celestial object is a naturally occurring physical entity, association, or structure that current astronomy has demonstrated to exist in the observable universe. In astronomy, the object and body are often used interchangeably. Examples for astronomical objects include planetary systems, star clusters and galaxies, while asteroids, moons and stars are astronomical bodies. A comet may be identified as both body and object, It is a body when referring to the nucleus of ice and dust. The universe can be viewed as having a hierarchical structure, at the largest scales, the fundamental component of assembly is the galaxy. Galaxies are organized groups and clusters, often within larger superclusters. Disc galaxies encompass lenticular and spiral galaxies with features, such as spiral arms, at the core, most galaxies have a supermassive black hole, which may result in an active galactic nucleus. Galaxies can have satellites in the form of dwarf galaxies, the constituents of a galaxy are formed out of gaseous matter that assembles through gravitational self-attraction in a hierarchical manner.
At this level, the fundamental components are the stars. The great variety of forms are determined almost entirely by the mass, composition. Stars may be found in systems that orbit about each other in a hierarchical organization. A planetary system and various objects such as asteroids and debris. The various distinctive types of stars are shown by the Hertzsprung–Russell diagram —a plot of stellar luminosity versus surface temperature. Each star follows a track across this diagram. If this track takes the star through a region containing a variable type. An example of this is the instability strip, a region of the H-R diagram that includes Delta Scuti, RR Lyrae, the table below lists the general categories of bodies and objects by their location or structure. International Astronomical Naming Commission List of light sources List of Solar System objects Lists of astronomical objects SkyChart, Sky & Telescope Monthly skymaps for every location on Earth
1419 Danzig, provisional designation 1929 RF, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered on 5 September 1929, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany and it was named for the city of Gdańsk. Danzig is a S-type asteroid and member of the Flora family and it orbits the Sun at a distance of 2. 0–2.6 AU once every 3 years and 6 months. Its orbit has an eccentricity of 0.15 and an inclination of 6° with respect to the ecliptic, in 1917, it was first observed as A917 GA at Simeiz Observatory, extending the bodys observation arc by 12 years prior to its official discovery observation at Heidelberg. The Collaborative Asteroid Lightcurve Link adopts Petr Pravecs revised WISE-data, that is, an albedo of 0.2324, in November 1988, Polish astronomer Wiesław Wiśniewski obtained a rotational lightcurve of Danzig from photometric observations. It gave a rotation period of 8.0 hours with a brightness variation of 0.92 magnitude.
In October 2002, another lightcurve obtained by Italian/French amateur astronomers Silvano Casulli and Laurent Bernasconi gave a period of 8.1202 hours. While Danzig has a rotation period, it has a high brightness variation. In 2011, a modeled lightcurve using data from the Uppsala Asteroid Photometric Catalogue and other sources gave a period 8.11957 hours and this minor planet was named after the now Polish city and port on the Baltic sea, Gdańsk. The city was honored by another minor planet,764 Gedania