1719 Jens
1719 Jens is a background asteroid from the central region of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 17 February 1950, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany. It was named after a grandson of the discoverer.
Orbit and classification
Jens orbits the Sun in the central main-belt at a distance of 2.1–3.2 AU once every 4 years and 4 months. Its orbit has an eccentricity of 0.22 and an inclination of 14° with respect to the ecliptic. First identified as at Simeiz Observatory in 1922, Jens first used observation was taken at Turku in 1948, extending the body's observation arc by 2 years prior to its official discovery observation.In 2010, Jens was passing in front of the Tadpole Nebula .
Physical characteristics
Lightcurves
In September 2000, American astronomer Brian Warner obtained two rotational lightcurves, giving a rotation period of 5.867 and 5.87 hours with a brightness variation of 0.50 and 0.55 magnitude, respectively.In February 2006, photometric observations by French amateur astronomer Laurent Bernasconi gave a concurring period of 5.873 hours with an amplitude of 0.55 magnitude. This well-defined period was further confirmed by a modeled light-curve using data from the Lowell Photometric Database, giving a period of 5.87016 hours.