+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 42 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1788040870461589 3.5262e-08   a 3.026667539544382 1.3128e-08 au q 2.485487013343905 1.0975e-07 au i 9.921023362116829 3.5637e-06 deg node 166.9420590826186 1.9346e-05 deg peri 50.6547364883412 2.1568e-05 deg M 215.7518053448935 1.2456e-05 deg tp 2459971.143271815277 (2023-Jan-26.64327182) 6.9746e-05 TDB period 1923.293241325003 5.27 1.2514e-05 3.426e-08 d yr n .1871789450848313 1.2179e-09 deg/d Q 3.567848065744859 1.5476e-08 au   Orbit Determination Parameters    # obs. used (total)      2884      data-arc span      30281 days (82.90 yr)      first obs. used      1938-02-22      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43105      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:55:39   Additional Information  Earth MOID = 1.49252 au   Jupiter MOID = 1.45242 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 11.71   n/a E2021B10   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. 2020-October); 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 ] 2021-Mar-02 21:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin