+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   305974 (2009 HS85) Classification: Main-belt Asteroid          SPK-ID: 2305974 [ 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 9 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1304790259432396 1.4598e-07   a 2.626535011410798 4.6743e-08 au q 2.283827281516101 4.1473e-07 au i 8.936798973127468 8.985e-06 deg node 188.5633443971389 3.6375e-05 deg peri 336.9780787091621 4.2778e-05 deg M 253.9468057569142 2.4988e-05 deg tp 2459458.530576767996 (2021-Sep-01.03057677) 0.00011553 TDB period 1554.795296957581 4.26 4.1505e-05 1.136e-07 d yr n .2315417345964752 6.181e-09 deg/d Q 2.969242741305494 5.2842e-08 au   Orbit Determination Parameters    # obs. used (total)      161      data-arc span      6203 days (16.98 yr)      first obs. used      2002-10-05      last obs. used      2019-09-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58628      source      ORB      producer      Otto Matic      solution date      2019-Nov-08 07:41:51   Additional Information  Earth MOID = 1.2931 au   Jupiter MOID = 2.01247 au   T_jup = 3.373  [ hide covariance matrix ] Orbital Elements at Epoch 2457040.5 (2015-Jan-18.0) TDB Reference: JPL 9 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1296720855871759 1.4688e-07   q 2.286755758643268 4.1729e-07 au tp 2456349.691533801821 (2013-Feb-26.19153380) 8.7896e-05 TDB node 188.5897616639466 3.6346e-05 deg peri 337.2866500637023 4.2707e-05 deg i 8.93831056045636 8.9892e-06 deg   Orbit Determination Parameters    # obs. used (total)      161      data-arc span      6203 days (16.98 yr)      first obs. used      2002-10-05      last obs. used      2019-09-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58628      source      ORB      producer      Otto Matic      solution date      2019-Nov-08 07:41:51   Additional Information  Jupiter MOID = 2.01247 au   T_jup = 3.373  Orbit Covariance (6×6)   e q tp node peri i e 2.157502643532234E-14 -6.116416305547567E-14 2.633728991381315E-12 -1.2589479766219E-13 9.506240989873316E-13 -8.539443671917701E-14 q -6.116416305547567E-14 1.741327358419152E-13 -7.194741554898522E-12 3.561239116326043E-13 -2.558466611467656E-12 2.449651571699824E-13 tp 2.633728991381315E-12 -7.194741554898522E-12 7.72578478220103E-9 -1.852855449245855E-11 1.975482104892407E-9 -3.774201810002913E-12 node -1.2589479766219E-13 3.561239116326043E-13 -1.852855449245855E-11 1.321027864845128E-9 -1.310125001951618E-9 -1.011002687023028E-10 peri 9.506240989873316E-13 -2.558466611467656E-12 1.975482104892407E-9 -1.310125001951618E-9 1.823895129493979E-9 9.873969304414239E-11 i -8.539443671917701E-14 2.449651571699824E-13 -3.774201810002913E-12 -1.011002687023028E-10 9.873969304414239E-11 8.080627536489376E-11 [ 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 16.8   n/a MPO494624   305974 (2009 HS85)          Discovered 2009-Apr-29 by Spacewatch at Kitt Peak Reference: 20111110/Numbers.arc Last Updated: 2011-11-14 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-28 18:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin