+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1388 Aphrodite (1935 SS) Classification: Main-belt Asteroid          SPK-ID: 2001388 [ 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 .08971330070314676 2.9479e-08   a 3.020244274636398 1.2496e-08 au q 2.749288191828986 8.8307e-08 au i 11.19057221384503 4.1738e-06 deg node 54.36162240349375 1.7685e-05 deg peri 257.2763849199765 3.0219e-05 deg M 109.9720135651012 2.5217e-05 deg tp 2458414.845873497839 (2018-Oct-23.34587350) 0.00013399 TDB period 1917.174003692926 5.25 1.1899e-05 3.258e-08 d yr n .187776383002563 1.1654e-09 deg/d Q 3.29120035744381 1.3617e-08 au   Orbit Determination Parameters    # obs. used (total)      2889      data-arc span      30815 days (84.37 yr)      first obs. used      1935-09-24      last obs. used      2020-02-05      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42855      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 15:53:30   Additional Information  Earth MOID = 1.76271 au   Jupiter MOID = 1.94602 au   T_jup = 3.212  [ 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 11.0   n/a MPO502166   diameter diameter 21.355 km 0.282 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 11.9432 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Ivarsen, K.; Willis, S.; Ingleby, L.; Matthews, D.; Simet, M. (2004) Minor Planet Bull. 31, 29-33.] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Oey, J.; Krajewski, R. (2008) Minor Planet Bull. 35, 47-48.] [Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2016) Astron. Astrophys., submitted.] [Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2018) Icarus 299, 84-96.] geometric albedo albedo 0.144   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   B-V BV 0.860   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=15.04 deg. U-B UB 0.490   0.040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=15.04 deg. 1388 Aphrodite (1935 SS)          Discovered 1935-Sep-24 by Delporte, E. at Uccle Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1935 SS = A914 TC  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-08 08:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin