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78457 (2002 RZ31)
Classification: Main-belt Asteroid          SPK-ID: 2078457
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1534501052864451 3.807e-08  
a 2.691746895928876 1.1003e-08 au
q 2.278698051344128 1.0578e-07 au
i 2.460358856976408 3.6896e-06 deg
node 268.9552640825273 0.00012233 deg
peri 163.0985034586388 0.00012376 deg
M 299.2150919215944 1.703e-05 deg
tp 2459272.859809495434
(2021-Feb-27.35980950)
7.6209e-05 TDB
period 1613.057163661145
4.42
9.8904e-06
2.708e-08
d
yr
n .2231786994968675 1.3684e-09 deg/d
Q 3.104795740513624 1.2691e-08 au
  Orbit Determination Parameters
   # obs. used (total)      776  
   data-arc span      9930 days (27.19 yr)  
   first obs. used      1993-09-09  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52961  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:06:34  

Additional Information
 Earth MOID = 1.29354 au 
 Jupiter MOID = 2.16427 au 
 T_jup = 3.353 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457209.5 (2015-Jul-06.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1529210414991255 3.8048e-08  
q 2.281627193029522 1.0561e-07 au
tp 2457651.589123627842
(2016-Sep-20.08912363)
7.7966e-05 TDB
node 269.1272339851403 0.00012294 deg
peri 161.6182078535533 0.00012436 deg
i 2.452172012561232 3.6842e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      776  
   data-arc span      9930 days (27.19 yr)  
   first obs. used      1993-09-09  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52961  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:06:34  

Additional Information
 Jupiter MOID = 2.16427 au 
 T_jup = 3.353 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.447640797835979E-15 -4.004712484824223E-15 -6.242322362051522E-13 -2.426997792529274E-14 -9.13994568080813E-14 -1.07480628819668E-15
q -4.004712484824223E-15 1.115449335751671E-14 1.60507811762599E-12 7.035669715851597E-14 2.147305874046758E-13 2.990071225874317E-15
tp -6.242322362051522E-13 1.60507811762599E-12 6.078620286853782E-9 5.676215245754678E-11 1.493554835872156E-9 1.96563620441463E-12
node -2.426997792529274E-14 7.035669715851597E-14 5.676215245754678E-11 1.511318371504112E-8 -1.50859446776928E-8 -7.919646222660307E-11
peri -9.13994568080813E-14 2.147305874046758E-13 1.493554835872156E-9 -1.50859446776928E-8 1.546484244251008E-8 7.958914199874187E-11
i -1.07480628819668E-15 2.990071225874317E-15 1.96563620441463E-12 -7.919646222660307E-11 7.958914199874187E-11 1.357300524033637E-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 15.4   n/a MPO439582  

78457 (2002 RZ31)          Discovered 2002-Sep-04 by LONEOS at Anderson Mesa
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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