19 Fortuna

Main-belt asteroid August 2024 yes #D6D6D6 19 Fortuna 24px|class=skin-invert|𜻌 (historical) 19 Fortuna VLT (2021), deconvolved.pdf VLT-SPHERE image of Fortuna John Russell Hind 22 August 1852 George Bishop's Observatory (19) Fortuna A902 UG f ɔr ˈ tj uː n əNoah Webster (1884) A Practical Dictionary of the English Language Fortunian f ɔr ˈ tj uː n i ə n Fortūna Main belt 21 November 2025 (JD 2461000.5) 2.442 AU 2.056 AU 2.828 AU 0.159 3.816 yr (1393.907 d) 1.573° 211.001° 182.515° 1.062 AU 2.601 AU 96.500° 3.483 (242 × 203 × 192) ± 10 km 211 2 km 8.53 0.10 18 kg (2025)Calculated from its standard gravitational parameter GM = 0.569 0.007 km3 s2.8.11 0.62 18 kg (2023) 1.73 0.05 g/cm3 (2025)1.65 0.13 g/cm3 (2023) ~0.0629 m/s² ~0.1190 km/s 7.443224 0.000001 h 29° G 8.88 to 12.95 7.497.13 60 3 deg 103 3 deg 0.056 0.037 0.25" to 0.072" ~180 K 19 Fortuna is one of the largest main-belt asteroids. It has a composition similar to 1 Ceres: a darkly colored surface that is heavily space-weathered with the composition of primitive organic compounds, including tholins. Fortuna is 225 km in diameter and has one of the darkest known geometric albedos for an asteroid over 150 km in diameter. Its albedo has been measured at 0.028 and 0.037. The spectra of the asteroid displays evidence of aqueous alteration. History Discovery Fortuna was discovered by English astronomer John Russell Hind on the evening of 22 August 1852. He was observing from George Bishop's Observatory in London, England, when he spotted a magnitude 9 object with a yellowish color (possibly caused by the atmosphere). His discovery was announced in the scientific journal Astronomische Nachrichten on 31 August. Name and symbol Soon after discovery, the observatory's owner George Bishop encouraged Hind to choose a name for the asteroid. He chose "Fortuna", after the Roman goddess of fortune and misfortune.15 No astronomical symbol was provided in Hind's discovery announcements. A symbol of a star over Fortune's wheel 12px|alt=19 Fortuna symbol|class=skin-invert (U+1CECC 𜻌) appeared in the book An Astronomical Vocabulary, written by Hind and published on the year of Fortuna's discovery, but no explanation for the symbol was provided.9 Orbit Fortuna orbits the Sun with an average distance (or semi-major axis of 2.44 astronomical units (AU), an orbital period of 3.82 years, and an orbital inclination of 1.57°, placing it within the inner main asteroid belt.87 Along its elliptical orbit, its distance from the Sun varies between 2.06 AU at perihelion to 2.83 AU at aphelion due to an orbital eccentricity of 0.16. It does not belong to any known asteroid family, making it a background asteroid. Physical characteristics The Hubble Space Telescope observed Fortuna in 1993. It was resolved with an apparent diameter of 0.20 arcseconds (4.5 pixels in the Planetary Camera) and its shape was found to be nearly spherical. Satellites were searched for but none were detected. Stellar occultations by Fortuna have been observed several times. Fortuna has been studied by radar. Fortuna has been perturbed by the 80 km 135 Hertha and was initially estimated by Baer to have a mass of 1.0819 kg. A more recent estimate by Baer suggests it has a mass of 1.2719 kg. Notes References 2024-11-14 last obs JPL Small-Body Database Browser: 19 Fortuna http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=19 2024-12-21 (19) Irene – Proper Elements https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=19 Asteroids Dynamic Site 19 April 2026 2008 Recent Asteroid Mass Determinations Personal Website Jim Baer http://home.earthlink.net/~jimbaer1/astmass.txt 2008-11-27 https://web.archive.org/web/20131021074442/http://home.earthlink.net/~jimbaer1/astmass.txt 21 October 2013 dead Radar-Detected Asteroids and Comets NASA/JPL Asteroid Radar Research http://echo.jpl.nasa.gov/asteroids/ 2011-10-30 https://www.unicode.org/L2/L2023/23207-historical-asteroids.pdf Unicode request for historical asteroid symbols Bala Gavin Jared Miller Kirk 18 September 2023 unicode.org Unicode 26 September 2023 AstDys (19) Fortuna Ephemerides Department of Mathematics, University of Pisa, Italy https://newton.spacedys.com/astdys/index.php?pc=1.1.3.1&n=19&oc=500&y0=1963&m0=10&d0=31&h0=0&mi0=0&y1=1963&m1=10&d1=31&h1=0&mi1=0&ti=1.0&tiu=days 2010-06-27 Hind John R. Entdeckung eines neuen Planeten, von Herrn Hind in London August 1852 Astronomische Nachrichten 35 79–80 Hind J. R. Fortuna June 1852 Monthly Notices of the Royal Astronomical Society 12 8 192 10.1093/mnras/12.8.192 free Blanco C. etal Earth-bound observations of asteroid 19 Fortuna imaging : lightcurves, pole direction and shape February 1996 Planetary and Space Science 44 2 87–91 10.1016/0032-0633(95)00079-8 Spectroscopic comparison of aqueous altered asteroids with CM2 carbonaceous chondrite meteorites 1 . Fornasier S. Lazzarin M. Barbieri C. Barucci M. A. Astronomy and Astrophysics Supplement 135 65–73 February 1999 10.1051/aas:1999161 1999A&AS..135...65F free https://ui.adsabs.harvard.edu/link_gateway/1999A&AS..135...65F/PUB_PDF Schmadel Lutz D. Dictionary of minor planet names 1 5th 2003 Springer-Verlag Berlin Heidelberg New York 3-540-00238-3 16 10.1007/978-3-540-29925-7_13 Storrs Alex Dunne Conan Mugnier A closer look at main belt asteroids 1: WF/PC images Icarus 173 2 409–416 2005 10.1016/j.icarus.2004.08.007 http://web.mit.edu/bpweiss/www/StorrsWeiss2005AsteroidsHSTIcarus.pdf 2007-09-23 https://web.archive.org/web/20070418034343/http://web.mit.edu/bpweiss/www/StorrsWeiss2005AsteroidsHSTIcarus.pdf April 18, 2007 2005Icar..173..409S etal Baer James James Baer Steven R. Chesley Steven R. Chesley Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris Celestial Mechanics and Dynamical Astronomy 100 2008 27–42 Springer Science+Business Media B.V. 2007 10.1007/s10569-007-9103-8 2008 2008CeMDA.100...27B free etal P. Vernazza M. Ferrais L. Jorda J. Hanuš B. Carry M. Marsset VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis Astronomy & Astrophysics 654 A56 free 10.1051/0004-6361/202141781 October 2021 A56 2021A&A...654A..56V 239104699 10261/263281 free Fuentes-Muñoz Oscar Farnocchia Davide Giorgini Jon D. Park Ryan S. 2025-12-01 Asteroid Mass Estimation by Mutual Perturbations During Close Encounters After Gaia Focused Product Release The Astronomical Journal 170 6 353 10.3847/1538-3881/ae0cc9 0004-6256 free 2025AJ....170..353F 283347135 Li 李 Fan 凡 Yuan 袁 Ye 烨 Fu 傅 Yanning 燕宁 Chen 陈 Jian 健 2023-09-01 Dynamical Masses of 20 Asteroids Determined with Gaia DR3 Asteroid Observations The Astronomical Journal 166 3 93 10.3847/1538-3881/ace52b 0004-6256 free 2023AJ....166...93L 260534542 External links 19 18 Melpomene 19 20 Massalia Category:Background asteroids Fortuna Fortuna Category:G-type asteroids (Tholen) Category:Ch-type asteroids (SMASS) 18520822