+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1301 Yvonne (1934 EA) Classification: Main-belt Asteroid          SPK-ID: 2001301 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2701483375431601 3.3041e-08   a 2.766385241474 1.1281e-08 au q 2.019050867485865 9.2939e-08 au i 34.03661509542979 5.3479e-06 deg node 161.5085003842927 6.5242e-06 deg peri 302.1801244114578 1.1627e-05 deg M 310.8263000242243 1.1473e-05 deg tp 2459230.060838148803 (2021-Jan-15.56083815) 5.4358e-05 TDB period 1680.611826530867 4.60 1.028e-05 2.815e-08 d yr n .2142077035975137 1.3102e-09 deg/d Q 3.513719615462134 1.4328e-08 au   Orbit Determination Parameters    # obs. used (total)      2355      data-arc span      31559 days (86.40 yr)      first obs. used      1934-03-07      last obs. used      2020-08-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .37553      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:31:48   Additional Information  Earth MOID = 1.15494 au   Jupiter MOID = 1.92765 au   T_jup = 3.044  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.3   n/a MPO265963   diameter diameter 21.438 km 0.088 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 7.320 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Pray, D.P. (2004) Minor Planet Bull. 31, 6-8.] [Oey, J.; Vilagi, J.; Gajdos, S.; Kornos, L.; Galad, A. (2007) Minor Planet Bull. 34, 81-83.] [Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.] [Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] geometric albedo albedo 0.111   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) 1301 Yvonne (1934 EA)          Discovered 1934-Mar-07 by Boyer, L. at Algiers Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-20 12:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin