+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   710 Gertrud (A911 DB) Classification: Main-belt Asteroid          SPK-ID: 2000710 [ 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 45 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .132751908114272 3.0528e-08   a 3.13102899006082 1.3508e-08 au q 2.715378917269144 9.5346e-08 au i 1.750748690806703 3.4955e-06 deg node 140.1746872552722 0.00011519 deg peri 99.652819358766 0.000116 deg M 192.1213518558415 1.5484e-05 deg tp 2459944.174071725578 (2022-Dec-30.67407173) 9.0021e-05 TDB period 2023.620451896217 5.54 1.3095e-05 3.585e-08 d yr n .1778989729337163 1.1512e-09 deg/d Q 3.546679062852496 1.5301e-08 au   Orbit Determination Parameters    # obs. used (total)      3385      data-arc span      40027 days (109.59 yr)      first obs. used      1911-04-16      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42935      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:55:35   Additional Information  Earth MOID = 1.70373 au   Jupiter MOID = 1.46177 au   T_jup = 3.199  [ 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 11.1   n/a MPO279520   diameter diameter 29.208 km 0.249 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   rotation period rot_per 8.288 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Oey, J. (2006) Minor Planet Bull. 33, 96-99.] geometric albedo albedo 0.075   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   710 Gertrud (A911 DB)          Discovered 1911-Feb-28 by Palisa, J. at Vienna Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A911 DB = 1934 LF  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 17:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin