+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1320 Impala (1934 JG) Classification: Main-belt Asteroid          SPK-ID: 2001320 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2291131868663308 3.4659e-08   a 2.992607316480919 1.3969e-08 au q 2.306961517162478 1.0285e-07 au i 19.79779018651536 4.337e-06 deg node 71.89532856784852 1.1339e-05 deg peri 205.8992004227688 1.5393e-05 deg M 221.1793639092864 1.3689e-05 deg tp 2459729.662887760253 (2022-May-30.16288776) 7.5105e-05 TDB period 1890.919440983968 5.18 1.324e-05 3.625e-08 d yr n .1903835733016043 1.333e-09 deg/d Q 3.678253115799361 1.7169e-08 au   Orbit Determination Parameters    # obs. used (total)      2581      data-arc span      31394 days (85.95 yr)      first obs. used      1934-05-13      last obs. used      2020-04-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .38314      source      ORB      producer      Otto Matic      solution date      2020-May-20 01:22:46   Additional Information  Earth MOID = 1.30491 au   Jupiter MOID = 1.48668 au   T_jup = 3.128  [ 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 10.9   n/a MPO384759   diameter diameter 37.331 km 0.224 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 6.1713 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D. (2006) Minor Planet Bull. 33, 85-88.] [Benishek, V. (2016) Minor Planet Bull. 43, 339-342.] [Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.] [Durech, J.; Hanus, J.; Broz, M.; Lehky, M.; et al. (2017) Icarus 304, 101-109.] geometric albedo albedo 0.078   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   1320 Impala (1934 JG)          Discovered 1934-May-13 by Jackson, C. at Johannesburg (UO) Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1934 JG = 1939 JE = 1949 FV = 1951 WU  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Sep-20 12:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin