+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1465 Autonoma (1938 FA) Classification: Main-belt Asteroid          SPK-ID: 2001465 [ 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 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1790761091516944 3.6664e-08   a 3.025928617538278 1.3505e-08 au q 2.484057094138758 1.1317e-07 au i 9.921682554900221 4.4621e-06 deg node 166.9488550514246 1.9378e-05 deg peri 50.67184025673411 2.2092e-05 deg M 178.2841739890103 1.2675e-05 deg tp 2458048.368929882152 (2017-Oct-21.86892988) 6.4664e-05 TDB period 1922.588963300545 5.26 1.2871e-05 3.524e-08 d yr n .1872475120121262 1.2536e-09 deg/d Q 3.567800140937798 1.5924e-08 au   Orbit Determination Parameters    # obs. used (total)      2453      data-arc span      30110 days (82.44 yr)      first obs. used      1938-02-22      last obs. used      2020-07-31      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46019      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:34:43   Additional Information  Earth MOID = 1.49207 au   Jupiter MOID = 1.45368 au   T_jup = 3.198  [ 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 11.7   n/a MPO502167   diameter diameter 18.111 km 0.276 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 4.882 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Brinsfield, J.W. (2008) Minor Planet Bull. 35, 23-24.] [Fauvaud, S.; Fauvaud, M. (2013) Minor Planet Bull. 40, 224-229.] [Ditteon, R.; Adam, A.; Doyel, M.; Gibson, J.; et al. (2018) Minor Planet Bull. 45, 13-16.] geometric albedo albedo 0.123   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   1465 Autonoma (1938 FA)          Discovered 1938-Mar-20 by Wachmann, A. at Bergedorf Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1938 FA = 1938 EQ = 1950 QJ = 1975 EW1 = 1975 LD  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-26 20:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin