1998 DK36

Asteroid September 2020 yes 1998 DK 36 #FFC2E0 D. Tholen Mauna Kea Obs. 23 February 1998 1998 DK 36 NEOAtira 24 February 1998 (JD 2450868.5) 9 (1 day) 0.9802 AU 0.4043 AU 0.6923 AU 0.4160 0.58 yr (210 days) 183.25° 1.7112 ms / day 2.0175° 151.46° 180.04° 0.0084 AU3.3 LD 30 m (est. at 0.20) 25.0 1998 DK 36 is a 30-meter sized asteroid and near-Earth object that is possibly the first Apohele asteroid (Atira) – an asteroid that is always closer to the Sun than Earth – detected. It was first observed on 23 February 1998, by David J. Tholen at Mauna Kea Observatory, Hawaii, but is now considered a lost minor planet. Although its orbital elements have not been well established, its aphelion (farthest distance from Sun) was determined to be less than the Earth's distance to the Sun (0.980 ± 0.05 AU). Therefore, it has a claim to title "first Apohele detected", if not "first Apohele confirmed", which goes to 163693 Atira. This asteroid is estimated to measure 30 meters in diameter based on its absolute magnitude 25.0 and an assumed albedo of 0.20, typical for stony S-type asteroid and common among near-Earth objects. References 1998-02-24 last obs. JPL Small-Body Database Browser: (1998 DK36) http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3184472 Jet Propulsion Laboratory 3 August 2017 1998 DK36 Minor Planet Center http://www.minorplanetcenter.net/db_search/show_object?object_id=1998+DK36 3 August 2017 Asteroid Size Estimator CNEOS/JPL https://cneos.jpl.nasa.gov/tools/ast_size_est.html 2 August 2017 http://www.astro.uu.se/IAU/c20/scipre.html Update On Small Solar Elongation NEO Search D.J. Tholen R.J. Whiteley 2006-04-01 Science presentations announced for the Comm 20 sessions at GA24 https://web.archive.org/web/20060225025933/http://www.astro.uu.se/IAU/c20/scipre.html 25 February 2006 dead External links Astronomers Find New Class of Asteroid, University of Hawaii Institute for Astronomy, 1 July 1998 1998+DK36 1998DK36 # # Category:Minor planet object articles (unnumbered) Category:Lost minor planets 19980223