1575 Winifred

Asteroid October 2019 yes 1575 Winifred #D6D6D6 20 April 1950 Indiana University(Indiana Asteroid Program) Goethe Link Obs. (1575) Winifred 1950 HH1928 HG1939 GK1950 HD 11977 UH 1 Winifred Sawtell(staff member at USNO) main-beltPhocaea 4 September 2017 (JD 2458000.5) 0 88.51 yr (32,327 days) 2.7990 AU 1.9497 AU 2.3743 AU 0.1789 3.66 yr (1,336 days) 158.55° 0.2694 ms / day 24.827° 206.84° 348.40° 9.31 1.0 km (IRAS)9.441 0.131 km9.45 km (derived)9.488 0.25410.66 0.43 km 125 2 h129 h 0.236 0.0330.2388 0.03110.2452 0.0640.247 0.0340.3134 (derived) S 11.36 1.1912.012.3 1575 Winifred, provisional designation 1950 HH, is a stony Phocaea asteroid and slow rotator from the inner regions of the asteroid belt, approximately 9.5 kilometers in diameter. It was discovered on 20 April 1950, by astronomer Robert Curry Cameron of Indiana University during the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States. It was named after Winifred Cameron, an astronomer at the United States Naval Observatory. Orbit and classification The stony S-type asteroid is a member of the Phocaea family (701), a group of asteroids with similar orbital characteristics, named after the family's namesake 25 Phocaea. It orbits the Sun at a distance of 1.9–2.8 AU once every 3 years and 8 months (1,336 days). Its orbit has an eccentricity of 0.18 and an inclination of 25° with respect to the ecliptic. Winifred was first identified as 1928 HG at Johannesburg Observatory in 1928, extending the body's observation arc by 22 years prior to its official discovery observation. Physical characteristics Rotational lightcurve In July 2009, a rotational lightcurve was obtained for this asteroid from photometric observations taken by American astronomer Brian D. Warner at his Palmer Divide Observatory in Colorado. It gave a well-defined rotation period of 125 2 hours with an exceptionally high brightness amplitude of 1.20 in magnitude (U=3), and no sign of a non-principal axis rotation (NPAR). The result supersedes a previous observation by French astronomer Laurent Bernasconi from May 2005, that gave a similar, yet less accurate period of 129 hours, and with a smaller amplitude of 0.51 in magnitude (U=1). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite, IRAS, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Winifred has an albedo of 0.24 to 0.25 and a diameter between 9.3 and 10.7 kilometers, while the Collaborative Asteroid Lightcurve Link derives a higher albedo of 0.31 and a diameter of 9.5 kilometers with an absolute magnitude of 12.0. Naming This minor planet was named for a staff member of the United States Naval Observatory in Washington D.C., Winifred Sawtell Cameron. The official 1575 naming citation was proposed by the discovering astronomer and published by the Minor Planet Center in December 1952 (M.P.C. 844). References 2016-10-20 last obs. JPL Small-Body Database Browser: 1575 Winifred (1950 HH) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001575 Jet Propulsion Laboratory 5 June 2017 Dictionary of Minor Planet Names – (1575) Winifred Schmadel Lutz D. Springer Berlin Heidelberg 125 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1576 (1575) Winifred 1575 Winifred (1950 HH) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1575 1 February 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 – (1575) Winifred Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001575 17 May 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001575 dead Asteroid 1575 Winifred – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1575+Winifred#Asteroid%201575%20WinifredEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 26 October 2019 October 2026 InternetArchiveBot 1575 17 May 2016 E. F. Tedesco P. V. Noah M. Noah S. D. Price October 2004 IRAS Minor Planet Survey V6.0 https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 17 October 2019 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 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...90M The Astrophysical Journal 741 2 25 2011ApJ...741...90M 10.1088/0004-637X/741/2/90 1109.6407 17 May 2016 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 17 May 2016 Warner, Brian D. January 2010 Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2009 June–September http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37...24W The Minor Planet Bulletin 37 1 24–27 1052-8091 2010MPBu...37...24W 17 May 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 17 May 2016 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri J. Dailey P. R. M. Eisenhardt R. S. McMillan T. B. Spahr M. F. Skrutskie D. Tholen R. G. Walker E. L. Wright E. DeBaun D. Elsbury T. IV Gautier S. Gomillion A. Wilkins November 2011 Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M The Astrophysical Journal 741 2 20 2011ApJ...741...68M 10.1088/0004-637X/741/2/68 1109.4096 8 December 2016 External links Lightcurve plot of 1575 Winifred, Palmer Divide Observatory, B. D. Warner (2009) 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 1575 1574 Meyer 1575 1576 Fabiola 001575 001575 Category:Named minor planets 001575 19500420