+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 43 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08965868426248653 2.9021e-08   a 3.020831724851722 1.1723e-08 au q 2.749987927023138 8.6159e-08 au i 11.18906031388486 3.5825e-06 deg node 54.35658866407124 1.6024e-05 deg peri 257.4167768084862 2.6791e-05 deg M 147.3736659912705 2.3119e-05 deg tp 2458415.435004489550 (2018-Oct-23.93500449) 0.00012194 TDB period 1917.733378502661 5.25 1.1163e-05 3.056e-08 d yr n .1877216113749258 1.0928e-09 deg/d Q 3.291675522680304 1.2774e-08 au   Orbit Determination Parameters    # obs. used (total)      3373      data-arc span      31166 days (85.33 yr)      first obs. used      1935-09-24      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .40472      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:54:55   Additional Information  Earth MOID = 1.76154 au   Jupiter MOID = 1.9451 au   T_jup = 3.211  [ 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 11.04   n/a E2021B10   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. 2020-October); 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 ] 2021-Feb-25 02:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin