+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   1028 Lydina (A923 VF) Classification: Outer Main-belt Asteroid          SPK-ID: 2001028 [ 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 50 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1057018278347849 3.7882e-08   a 3.404586267368677 1.5648e-08 au q 3.0447152758866 1.2446e-07 au i 9.394275014246936 4.3951e-06 deg node 62.82729315433016 2.1408e-05 deg peri 24.41364815034036 2.8979e-05 deg M 112.4662016232492 1.8636e-05 deg tp 2458283.672812925027 (2018-Jun-14.17281293) 0.00011912 TDB period 2294.53634623012 6.28 1.5819e-05 4.331e-08 d yr n .1568944421348885 1.0817e-09 deg/d Q 3.764457258850753 1.7302e-08 au   Orbit Determination Parameters    # obs. used (total)      2846      data-arc span      41360 days (113.24 yr)      first obs. used      1907-05-09      last obs. used      2020-08-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .39795      source      ORB      producer      Otto Matic      solution date      2020-Aug-24 22:26:38   Additional Information  Earth MOID = 2.06382 au   Jupiter MOID = 1.51822 au   T_jup = 3.115  [ 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 9.3   n/a MPO473776 IRAS observations used: 36 diameter diameter 88.526 km 0.762 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 11.680 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List: [Stephens, R.D. (2012) Minor Planet Bull. 39, 80-82.] [Strabla, L.; Quadri, U.; Girelli, R. (2012) Minor Planet Bull. 39, 177-179.] geometric albedo albedo 0.038   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   B-V BV 0.684   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=19.32 deg. U-B UB 0.276   0.058 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=19.32 deg. Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices 1028 Lydina (A923 VF)          Discovered 1923-Nov-06 by Albitzkij, V. at Simeis Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A923 VF = A907 JF = A914 JA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-22 12:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin