+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21534 (1998 OV12) Classification: Main-belt Asteroid          SPK-ID: 2021534 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06630555206054699 1.9991e-08   a 2.786742657983539 1.2398e-08 au q 2.601966147595265 6.0346e-08 au i 5.004619338799931 8.0346e-07 deg node 144.78530116 1.0247e-05 deg peri 179.6422612607342 1.6906e-05 deg M 290.2042996704456 1.2199e-05 deg tp 2459529.935118335235 (2021-Nov-11.43511834) 5.8083e-05 TDB period 1699.19697117024 4.65 1.1339e-05 3.104e-08 d yr n .2118647844293575 1.4138e-09 deg/d Q 2.971519168371814 1.322e-08 au   Orbit Determination Parameters    # obs. used (total)      1966      data-arc span      9009 days (24.67 yr)      first obs. used      1995-11-20      last obs. used      2020-07-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48598      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:47:37   Additional Information  Earth MOID = 1.58775 au   Jupiter MOID = 2.24969 au   T_jup = 3.322  [ 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 13.5   n/a MPO384938   diameter diameter 12.110 km 0.249 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.063   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21534 (1998 OV12)          Discovered 1998-Jul-26 by Elst, E. W. at La Silla Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 OV12 = 1995 WX34  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 10:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin