973 Aralia adopts the results obtained by IRAS, that is, an albedo of 0.0415 and a diameter of 63.75 kilometers based on an absolute magnitude of 10.05. Naming. This minor planet was named after the French province Alsace (regained from Germany after the WWI) in northeast France between the Rhine river and the Vosges mountains. In 1922, the discoverer proposed the name Alsace. However, the Astronomical Calculation Institute, then responsible for the naming of minor planets, changed the name in Alsatia. The political status of Alsace has been heavily influenced by historical decisions, wars, and strategic politics. 971 Alsatia 971 Alsatia, provisional 	971 Alsatia
23661949	972 Cohnia 972 Cohnia 972 Cohnia is a minor planet orbiting the Sun, one of several such in the asteroid belt. It was discovered on 18 January 1908 by a team in Heidelberg led by Max Wolf. In 2007, lightcurve data showed that Cohnia rotates every 18.472 ± 0.004 hours. It is named after the German astronomer Fritz Cohn. 972 Cohnia 972 Cohnia is a minor planet orbiting the Sun, one of several such in the asteroid belt. It was discovered on 18 January 1908 by a team in Heidelberg led by Max Wolf. In 2007, lightcurve data showed that Cohnia rotates 	972 Cohnia
23661950	973 Aralia 973 Aralia 973 Aralia (prov. designation:" "or" ) is an asteroid of the Ursula family located in the outer regions of the asteroid belt, approximately in diameter. It was discovered on 18 March 1922, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southern Germany. The Xk-type asteroid has a rotation period of 7.3 hours. It was named after the genus of ivy-like plant "Aralia", also known as "spikenard". Orbit and classification. "Aralia" is a core member of the Ursula family (), a large family of C- and X-type asteroids, named after 375 Ursula. It orbits the Sun  in the outer main-belt at a distance of 2.9–3.6 AU once every 5 years and 9 months (2,103 days; semi-major axis of 3.21 AU). Its orbit has an eccentricity of 0.11 and an inclination of 16° with respect to the ecliptic. The body's observation arc begins at Vienna Observatory on 28 March 1922, or 10 days after its official discovery observation at Heidelberg. Naming. This minor planet was named after the genus of the Eurasian ivy-like plant "Aralia", also known as "spikenard". A member of the Ginseng family, it has evergreen leaves, small yellowish flowers , and black berries. The in "The Names of the Minor Planets" by Paul Herget in 1955 (). Physical characteristics. In the SMASS classification, "Aralia" is a Xk-type, a transitional subtype of the X-type to the less common K-type asteroids. In both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), it is an X-type asteroid. The overall spectral type of the Ursula family is that of a C and X-type. Rotation period. In May 2015, a rotational lightcurve of "Aralia" was obtained from photometric observations by Julian Oey, Hasen Williams  and Roger Groom at the Blue Mountains Observatory and Darling Range Observatory (DRO). Lightcurve analysis gave a rotation period of hours with a brightness variation of magnitude (). Alternative observations by Robert Stephens at the Santana Observatory in 2001 and Michael S. Alkema at the Elephant Head Observatory in 2012, gave a similar period determination of and hours, with an amplitude of and , respectively (). Diameter and albedo. According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), and the Japanese Akari satellite, "Aralia" measures between 51.6 and  55.5 kilometers in diameter and its surface an albedo between 0.08 and 0.10. Additional publications by WISE in 2012 and 2015, gave a mean-diameter and , with an albedo of and , respectively. The "Collaborative Asteroid Lightcurve Link" derives an albedo of 0.0614 and a diameter of 51.24 kilometers based on an absolute magnitude of 10.1. 973 Aralia 973 Aralia ("prov. designation:" "or" ) is an asteroid of the Ursula family located in the outer regions of the asteroid belt, approximately in diameter. It was discovered on 18 March 1922, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southern Germany