1625 The NORC

Large main-belt asteroid October 2019 yes 1625 The NORC #D6D6D6 1 September 1953 S. Arend Uccle Obs. (1625) The NORC 1953 RB1929 CA1935 EN1936 QS1942 RK1947 NG1953 QK1954 UL 1A914 SA The IBM NORC(Naval Ordnance Research Calculator) main-belt(outer) 4 September 2017 (JD 2458000.5) 0 102.34 yr (37,380 days) 3.9236 AU 2.4606 AU 3.1921 AU 0.2292 5.70 yr (2,083 days) 147.86° 0.1728 ms / day 15.552° 320.78° 286.20° 44.66 2.09 km47.60 km (calculated)53.317 0.176 km55.863 1.536 km61.76 17.49 km75.11 0.80 km 12.94 0.01 h13.8113 0.0071 h13.959 0.004 h18.820 0.770 h 0.023 0.0040.03 0.020.0414 0.00770.057 (assumed)0.065 0.006 Tholen = CCB–V = 0.732U–B = 0.311 10.043 0.001 (R)10.070 0.080 (R)10.34 1625 The NORC (provisional designation 1953 RB) is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 55 kilometers in diameter. It was discovered on 1 September 1953, by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle, Belgium. It was named after the IBM Naval Ordnance Research Calculator (NORC). Orbit and classification The NORC orbits the Sun in the outer main-belt at a distance of 2.5–3.9 AU once every 5 years and 8 months (2,083 days). Its orbit has an eccentricity of 0.23 and an inclination of 16° with respect to the ecliptic. The asteroid was first identified as A914 SA at Heidelberg Observatory in 1914. Its observation arc begins 24 years prior to its official discovery observation, when it was identified as 1929 CA at Uccle. Physical characteristics In the Tholen classification, The NORC is a common carbonaceous C-type asteroid. Lightcurves Between 2009 and 2014, five rotational light-curve were obtained of The NORC from photometric observations taken by René Roy, David Higgins and the Palomar Transient Factory. The light-curves gave a rotation period between 12.94 and 18.820 hours with a change in brightness of 0.06 to 0.33 in magnitude (U=+1/2/3-). The best rated result with a period of 13.959 hours (Δmag 0.16) was obtained by Australian amateur astronomer David Higgins. Diameter and albedo According to the surveys carried out by Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, The NORC measures between 44.66 and 75.11 kilometers in diameter, and its surface has an albedo of 0.023 and 0.065. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 47.60 kilometers using an absolute magnitude of 10.34. Naming This minor planet was named after the IBM Naval Ordnance Research Calculator (NORC), IBM's first-generation vacuum tube computer built in the 1950s (also see List of vacuum tube computers and External links). NORC was the fastest, most powerful electronic computer of its time. Under the direction of Wallace J. Eckert, after whom the asteroid 1750 Eckert is named, NORC performed a vast amount of orbital calculations for minor planet. The official 1625 naming citation was published by the Minor Planet Center in May 1957 (M.P.C. 1591). References 2017-01-27 last obs. JPL Small-Body Database Browser: 1625 The NORC (1953 RB) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001625 https://web.archive.org/web/20200918051704/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001625 dead 18 September 2020 Jet Propulsion Laboratory 4 June 2017 Dictionary of Minor Planet Names – (1625) The NORC Schmadel Lutz D. Springer Berlin Heidelberg 129 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1626 (1625) the NORC 1625 The NORC (1953 RB) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1625 28 December 2016 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix – Publication Dates of the MPCs Schmadel Lutz D. Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 Asteroids and comets rotation curves – (1625) The NORC Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001625 28 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001625 dead 6 Joseph R. Masiero T. Grav A. K. Mainzer C. R. Nugent J. M. Bauer R. Stevenson S. Sonnett August 2014 Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 28 December 2016 1625 28 December 2016 6 Fumihiko Usui Daisuke Kuroda Thomas G. Müller Sunao Hasegawa Masateru Ishiguro Takafumi Ootsubo Daisuke Ishihara Hirokazu Kataza Satoshi Takita Shinki Oyabu Munetaka Ueno Hideo Matsuhara Takashi Onaka October 2011 Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey Publications of the Astronomical Society of Japan 63 5 1117–1138 2011PASJ...63.1117U 10.1093/pasj/63.5.1117 free (online, AcuA catalog p. 153) 6 A. Mainzer T. Grav J. Masiero E. Hand J. Bauer D. Tholen R. S. McMillan T. Spahr R. M. Cutri E. Wright J. Watkins W. Mo C. Maleszewski November 2011 NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results The Astrophysical Journal 741 2 25 2011ApJ...741...90M 10.1088/0004-637X/741/2/90 1109.6407 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri C. Nugent M. S. Cabrera November 2012 Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M The Astrophysical Journal Letters 759 1 5 2012ApJ...759L...8M 10.1088/2041-8205/759/1/L8 1209.5794 28 December 2016 6 C. R. Nugent A. Mainzer J. Masiero J. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett R. Stevenson E. L. Wright December 2015 NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 28 December 2016 Higgins, David January 2011 Period Determination of Asteroid Targets Observed at Hunters Hill Observatory: May 2009 - September 2010 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011MPBu...38...41H The Minor Planet Bulletin 38 1 41–46 1052-8091 2011MPBu...38...41H 28 December 2016 6 Chan-Kao Chang Wing-Huen Ip Ip Wing-huen Hsing-Wen Lin Yu-Chi Cheng Chow-Choong Ngeow Ting-Chang Yang Adam Waszczak Shrinivas R. Kulkarni David Levitan Branimir Sesar Russ Laher Jason Surace Thomas. A. Prince August 2015 Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJS..219...27C The Astrophysical Journal Supplement Series 219 2 19 2015ApJS..219...27C 10.1088/0067-0049/219/2/27 1506.08493 28 December 2016 6 Adam Waszczak Chan-Kao Chang Eran O. Ofek Russ Laher Frank Masci David Levitan Jason Surace Yu-Chi Cheng Wing-Huen Ip Daisuke Kinoshita George Helou Thomas A. Prince Shrinivas Kulkarni September 2015 Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W The Astronomical Journal 150 3 35 2015AJ....150...75W 10.1088/0004-6256/150/3/75 1504.04041 28 December 2016 External links About NORC: 8ZtdVUB007A Smartest Brain Joins The Navy (1954) (time 0:45 min.) Intermediate Palomar Transient Factory – home Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR https://web.archive.org/web/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1625 1624 Rabe 1625 1626 Sadeya 001625 Category:Discoveries by Sylvain Arend Category:Named minor planets 001625 19530901