+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   312580 (2009 HZ78) Classification: Main-belt Asteroid          SPK-ID: 2312580 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1503073282845211 5.7091e-08   a 2.644501105990241 3.0657e-08 au q 2.247013210103387 1.5158e-07 au i 7.594362709106169 7.6171e-06 deg node 202.4311774292209 4.0699e-05 deg peri 41.42227882898167 4.8165e-05 deg M 194.4791875059591 3.1487e-05 deg tp 2459722.711110069844 (2022-May-23.21111007) 0.00014586 TDB period 1570.775274163812 4.30 2.7315e-05 7.478e-08 d yr n .2291861897250979 3.9854e-09 deg/d Q 3.041989001877095 3.5265e-08 au   Orbit Determination Parameters    # obs. used (total)      210      data-arc span      6098 days (16.70 yr)      first obs. used      2004-02-11      last obs. used      2020-10-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53812      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 18:46:52   Additional Information  Earth MOID = 1.24111 au   Jupiter MOID = 1.97929 au   T_jup = 3.365  [ hide covariance matrix ] Orbital Elements at Epoch 2457481.5 (2016-Apr-03.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .15100419078502 5.687e-08   q 2.244086309747081 1.5089e-07 au tp 2458152.985289727338 (2018-Feb-03.48528973) 0.00012809 TDB node 202.4439655643294 4.0688e-05 deg peri 41.65076764872709 4.8158e-05 deg i 7.596121187746735 7.6203e-06 deg   Orbit Determination Parameters    # obs. used (total)      210      data-arc span      6098 days (16.70 yr)      first obs. used      2004-02-11      last obs. used      2020-10-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53812      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 18:46:52   Additional Information  Jupiter MOID = 1.97929 au   T_jup = 3.365  Orbit Covariance (6×6)   e q tp node peri i e 3.234153207585078E-15 -8.453854234462302E-15 -9.024305521075888E-13 -6.489539500027757E-15 -2.752900360760636E-13 9.542268556773025E-16 q -8.453854234462302E-15 2.276890449895022E-14 4.301274562578699E-12 1.916947426633021E-14 1.046958107835494E-12 -2.873660787842181E-15 tp -9.024305521075888E-13 4.301274562578699E-12 1.640773671797428E-8 2.621008155430242E-12 3.29670360850771E-9 -9.997392194255217E-12 node -6.489539500027757E-15 1.916947426633021E-14 2.621008155430242E-12 1.655503844394505E-9 -1.640308771328859E-9 -1.613321288639088E-11 peri -2.752900360760636E-13 1.046958107835494E-12 3.29670360850771E-9 -1.640308771328859E-9 2.319194013041907E-9 1.389954316640772E-11 i 9.542268556773025E-16 -2.873660787842181E-15 -9.997392194255217E-12 -1.613321288639088E-11 1.389954316640772E-11 5.806951630337574E-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 16.4   n/a MPO455304   312580 (2009 HZ78)          Discovered 2009-Apr-26 by Spacewatch at Kitt Peak Reference: 20120109/Numbers.arc Last Updated: 2012-01-11 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-26 22:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin