1906 Naef

Vestian main-belt asteroid January 2019 yes 1906 Naef #D6D6D6 001906-asteroid shape model (1906) Naef.png Modelled shape of Naef from its lightcurve 5 September 1972 P. Wild Zimmerwald Obs. (1906) Naef 1972 RC1943 VF1952 DG 11965 WF Robert A. Naef(amateur astronomer) main-beltVestoid 4 September 2017 (JD 2458000.5) 0 51.33 yr (18,749 days) 2.6944 AU 2.0517 AU 2.3731 AU 0.1354 3.66 yr (1,335 days) 94.839° 0.2696 ms / day 6.4757° 354.84° 14.485° 6.64 km (calculated)7.923 0.0908.057 0.083 km 11.00818 0.00001 h11.009 0.0012 hPravec11.0090 0.0002 h11.03 0.02 h 0.2282 0.04660.234 0.0520.4 (assumed) SQV 12.512.713.36 0.31 1906 Naef (prov. designation:1972 RC) is a stony vestoid asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 5 September 1972, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland. It was later named after Swiss banker and amateur astronomer Robert A. Naef. Orbit and classification Naef orbits the Sun in the inner main-belt at a distance of 2.1–2.7 AU once every 3 years and 8 months (1,335 days). Its orbit has an eccentricity of 0.14 and an inclination of 6° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Zimmerwald, as previous observation at Turku Observatory (1943 VF) and McDonald Observatory (1952 DG 1) in 1943 and 1952, respectively, remain unused. Physical characteristics According to observations by the Wide-field Infrared Survey Explorer's NEOWISE mission, Naef measures 7.9 and 8.1 kilometers in diameter, and its surface has an albedo of 0.23, while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.40 and calculates a diameter of 6.6 kilometer with an absolute magnitude of 12.5. Naef is a vestoid or V-type asteroid, with its spectral type comparable to that of the group's namesake, 4 Vesta. V-type asteroids are less common than the abundant S-type asteroids, but they are similar in their stony composition, except for their higher concentration of pyroxenes, an aluminium-rich silicate mineral. PanSTARRS photometric survey has characterized it as a SQ-type that transitions to the Q-type asteroids. Four rotational lightcurves, obtained during 2005–2009, gave a well-defined rotation period between 11.01 and 11.03 hours, and a brightness variation of 0.92–0.95 magnitude (U=n.a./3/n.a./2+).Pravec Naming This minor planet was named after Swiss banker Robert A. Naef (1907–1975) from Zürich, an ardent amateur astronomer, who produced the yearly observers almanac, Der Sternenhimmel, since 1940. The official 1906 naming citation was published by the Minor Planet Center on 18 April 1977 (M.P.C. 4157). Notes Pravec Pravec (2005) web: rotation period 11.009 0.0012 hours with a brightness amplitude of 0.92 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (1906) Naef References 30em 2017-03-21 last obs. JPL Small-Body Database Browser: 1906 Naef (1972 RC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001906 Jet Propulsion Laboratory 9 June 2017 Dictionary of Minor Planet Names – (1906) Naef Schmadel Lutz D. Springer Berlin Heidelberg (1906) Naef 153 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1907 1906 Naef (1972 RC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1906 11 December 2016 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 2009 https://archive.org/details/dictionaryminorp2008schm limited 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 1906 11 December 2016 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 Russell I. Durkee Petr Pravec June 2007 The Lightcurve of Asteroid 1906 NAEF https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2007MPBu...34...49D The Minor Planet Bulletin 34 2 49 1052-8091 2007MPBu...34...49D 11 December 2016 Polishook, David April 2010 Lightcurves and Spin Periods from the Wise Observatory - 2009 https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37...65P The Minor Planet Bulletin 37 2 65–69 1052-8091 2010MPBu...37...65P 11 December 2016 J. Durech J. Hanus D. Oszkiewicz R. Vanco March 2016 Asteroid models from the Lowell photometric database http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...587A..48D Astronomy and Astrophysics 587 6 2016A&A...587A..48D 10.1051/0004-6361/201527573 1601.02909 11 December 2016 6 Peter Veres Robert Jedicke Alan Fitzsimmons Larry Denneau Mikael Granvik Bryce Bolin Serge Chastel Richard J. Wainscoat William S. Burgett Kenneth C. Chambers Heather Flewelling Nick Kaiser Eugen A. Magnier Jeff S. Morgan Paul A. Price John L. Tonry Christopher Waters November 2015 Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V Icarus 261 34–47 2015Icar..261...34V 10.1016/j.icarus.2015.08.007 1506.00762 11 December 2016 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 11 December 2016 External links The Robert A. Naef Foundation 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 1906 1905 Ambartsumian 1906 1907 Rudneva 001906 Category:Discoveries by Paul Wild (Swiss astronomer) Category:Named minor planets 001906 19720905