110 Lydia

Main-belt asteroid October 2019 yes #D6D6D6 110 Lydia 110Lydia (Lightcurve Inversion).png Lightcurve-based 3D-model of Lydia Alphonse Borrelly 19 April 1870 (110) Lydia A870 HA; 1899 VA; 1972 YS 1 ' l ɪ d i əNoah Webster (1884) A Practical Dictionary of the English Language Lydia Main belt Lydia family 31 July 2016 (JD 2457600.5) 2.7325 AU Gm on 2.51115 AU Gm on 2.9539 AU Gm on on 0.081021 4.52 yr (1649.9 d) 5.9645° 56.871° 283.499° 348.344° 17.99 km/s 86.09 2.0 km 86.090 km 1.483e18 0.015 kgCalculated from its standard gravitational parameter GM = 0.099 0.001 km3 s2. 4.45 g/cm3 0.0134 m/s2 0.0480 km/s 10.927 h d on on 10.9258 hours M (Tholen) X (Bus) Xk (DeMeo et al.) 7.80 0.1808 0.009 0.181 ~168 K 0.21820 ms / day 145.80 yr (53,255 d) 0 3.341 110 Lydia is a large belt asteroid with an M-type spectrum, and thus may be metallic in composition, consisting primarily of nickel-iron. It was discovered by French astronomer Alphonse Borrelly on 19 April 1870 and was named for Lydia, the Asia Minor country populated by Phrygians. The Lydia family of asteroids is named after it. Observations made during 1958–1959 at the McDonald Observatory and in 1969 at the Kitt Peak National Observatory found an uneven light curve with a period of 10.9267 hours. In the late 1990s, a network of astronomers worldwide used light curves to derive spin states and shape models of 10 new asteroids, including (110) Lydia. They obtained a period of 10.92580 hours, with the brightness varying by no more than 0.2 in magnitude. In the Tholen classification system, it is categorized as an M-type asteroid, while the Bus asteroid taxonomy system lists it as an Xk asteroid. Absorption features in the near infrared are attributed to low-iron, low-calcium orthopyroxene minerals. Water content on the surface is estimated at 0.14–0.27 by mass fraction (wt%). Measurements of the thermal inertia of 110 Lydia give a value between 70 and 200 J·m−2·K−1·s−1/2, compared to 50 for lunar regolith and 400 for coarse sand in an atmosphere. It is a likely interloper in the Padua family of minor planets that share similar dynamic properties. Lydia occulted a dim star on 18 September 1999. Notes References Numbered Minor Planets 1–5000 Discovery Circumstances IAU Minor Planet center https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html 2013-04-07 . Donald K. Yeomans 110 Lydia JPL Small-Body Database Browser NASA Jet Propulsion Laboratory https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=110 12 May 2016 . Lutz D. Schmadel Dictionary of Minor Planet Names Springer 5th 23 2003 3-540-00238-3 . Carruba V. The (not so) peculiar case of the Padua family Monthly Notices of the Royal Astronomical Society 395 1 358–377 May 2009 2009MNRAS.395..358C . 10.1111/j.1365-2966.2009.14523.x free Francesca E. DeMeo Richard P. Binzel Stephen M. Slivan Schelte J. Bus 1 An extension of the Bus asteroid taxonomy into the near-infrared Icarus 202 1 160–180 2011 10.1016/j.icarus.2009.02.005 2009Icar..202..160D http://www.tara.tcd.ie/bitstream/2262/43276/1/PEER_stage2_10.1016%252Fj.icarus.2009.02.005.pdf 2013-12-11 . dead https://web.archive.org/web/20140317200310/https://www.tara.tcd.ie/bitstream/2262/43276/1/PEER_stage2_10.1016/j.icarus.2009.02.005.pdf 2014-03-17 See appendix A. Taylor R. C. Gehrels T. Silvester A. B. 1 Minor Planets and Related Objects. VI. Asteroid (110) Lydia Astronomical Journal 76 141 March 1971 10.1086/111097 1971AJ.....76..141T . free Durech J. Kaasalainen M. Marciniak A. 1 Physical models of ten asteroids from an observers' collaboration network Astronomy and Astrophysics 465 1 331–337 April 2007 10.1051/0004-6361:20066347 2007A&A...465..331D . free https://hal.science/hal-03801313/file/aa6347-06.pdf Delbo' Marco Tanga Paolo Thermal inertia of main belt asteroids smaller than 100 km from IRAS data Planetary and Space Science 57 2 259–265 February 2009 10.1016/j.pss.2008.06.015 2009P&SS...57..259D . 0808.0869 Hardersen Paul S. Gaffey Michael J. Abell Paul A. Near-IR spectral evidence for the presence of iron-poor orthopyroxenes on the surfaces of six M-type asteroids Icarus 175 1 141–158 January 1983 10.1016/j.icarus.2004.10.017 2005Icar..175..141H . DeMeo Francesca E. Binzel Richard P. Slivan Stephen M. Bus Schelte J. 1 An extension of the Bus asteroid taxonomy into the near-infrared Icarus 202 1 160–180 July 2009 10.1016/j.icarus.2009.02.005 2009Icar..202..160D http://www.tara.tcd.ie/bitstream/2262/43276/1/PEER_stage2_10.1016%252Fj.icarus.2009.02.005.pdf 2013-04-08 . dead https://web.archive.org/web/20140317200310/https://www.tara.tcd.ie/bitstream/2262/43276/1/PEER_stage2_10.1016/j.icarus.2009.02.005.pdf 2014-03-17 See appendix A. 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 External links Lightcurve plot of 110 Lydia, Palmer Divide Observatory, B. D. Warner (2012) 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/20160729213840/http://obswww.unige.ch/~behrend/page_cou.html 29 July 2016 Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)–(5000) Minor Planet Center 109 109 Felicitas 110 111 Ate 000110 Category:Discoveries by Alphonse Borrelly Category:Named minor planets 000110 000110 000110 18700419