+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   867 Kovacia (A917 DH) Classification: Main-belt Asteroid          SPK-ID: 2000867 [ 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 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1269271802503277 1.6036e-08   a 3.068428193749408 1.0937e-08 au q 2.67896125531619 4.9331e-08 au i 5.97064488769401 4.8348e-07 deg node 46.79853019060543 9.6965e-06 deg peri 70.36040307618929 1.5404e-05 deg M 150.2667642719381 1.1262e-05 deg tp 2458381.030474447959 (2018-Sep-19.53047445) 5.9347e-05 TDB period 1963.235387599458 5.38 1.0496e-05 2.874e-08 d yr n .1833707777854337 9.8038e-10 deg/d Q 3.457895132182627 1.2325e-08 au   Orbit Determination Parameters    # obs. used (total)      2877      data-arc span      37846 days (103.62 yr)      first obs. used      1917-02-26      last obs. used      2020-10-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4193      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 11:33:29   Additional Information  Earth MOID = 1.70261 au   Jupiter MOID = 1.66749 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 11.57   n/a E2021B10   diameter diameter 24.113 km 0.439 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 8.6772 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.] geometric albedo albedo 0.092   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   867 Kovacia (A917 DH)          Discovered 1917-Feb-25 by Palisa, J. at Vienna Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  A917 DH = 1942 XF = 1958 WA  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 19:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin