+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 56 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1054772905120029 3.7506e-08   a 3.40460659071729 1.4969e-08 au q 3.045497912269123 1.2359e-07 au i 9.393939273234052 4.3438e-06 deg node 62.82586001369302 2.0865e-05 deg peri 24.24405122332531 2.8058e-05 deg M 174.8144092412041 1.8154e-05 deg tp 2458282.273312480887 (2018-Jun-12.77331248) 0.00011568 TDB period 2294.556891780152 6.28 1.5133e-05 4.143e-08 d yr n .1568930372960622 1.0347e-09 deg/d Q 3.763715269165457 1.6548e-08 au   Orbit Determination Parameters    # obs. used (total)      3016      data-arc span      41689 days (114.14 yr)      first obs. used      1907-05-09      last obs. used      2021-06-28      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .39233      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 11:51:58   Additional Information  Earth MOID = 2.06452 au   Jupiter MOID = 1.51998 au   T_jup = 3.116  [ 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 9.38   n/a E2021B10 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. 2020-October); 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 ] 2021-Jul-25 15:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin