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9863 Reichardt (1991 RJ7)
Classification: Main-belt Asteroid          SPK-ID: 2009863
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1172105230395452 3.7621e-08  
a 2.238719996715063 8.5872e-09 au
q 1.976318454961002 8.3867e-08 au
i 3.353898390463874 3.9732e-06 deg
node 291.4284684529233 7.7022e-05 deg
peri 300.9030693104191 8.0702e-05 deg
M 231.3737754697062 2.8645e-05 deg
tp 2459037.644598162623
(2020-Jul-07.14459816)
9.8577e-05 TDB
period 1223.483437481137
3.35
7.0395e-06
1.927e-08
d
yr
n .2942418254072608 1.693e-09 deg/d
Q 2.501121538469125 9.5937e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1509  
   data-arc span      10312 days (28.23 yr)  
   first obs. used      1991-09-13  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53044  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 22:56:08  

Additional Information
 Earth MOID = .967707 au 
 Jupiter MOID = 2.50012 au 
 T_jup = 3.625 
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Orbital Elements at Epoch 2456137.5 (2012-Jul-29.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1170015233854365 3.7535e-08  
q 1.976951837551707 8.3555e-08 au
tp 2456591.207757443001
(2013-Oct-25.70775744)
9.2733e-05 TDB
node 291.4957556379873 7.7016e-05 deg
peri 300.8876131776263 8.0717e-05 deg
i 3.353925565484385 3.9733e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1509  
   data-arc span      10312 days (28.23 yr)  
   first obs. used      1991-09-13  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53044  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 22:56:08  

Additional Information
 Jupiter MOID = 2.50012 au 
 T_jup = 3.625 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.408841852703122E-15 -3.123423515965282E-15 -1.319144633915052E-13 5.6836028259964E-15 -6.095436361829565E-14 1.106965412340845E-15
q -3.123423515965282E-15 6.981425876500745E-15 5.562120191175039E-13 -1.285197569047025E-14 1.98477187011842E-13 -2.469005645778859E-15
tp -1.319144633915052E-13 5.562120191175039E-13 8.599476125562454E-9 2.144518393691846E-11 2.262881682459179E-9 -1.308107118486428E-12
node 5.6836028259964E-15 -1.285197569047025E-14 2.144518393691846E-11 5.931514313068822E-9 -5.914621917990963E-9 2.411671089893044E-11
peri -6.095436361829565E-14 1.98477187011842E-13 2.262881682459179E-9 -5.914621917990963E-9 6.51518637433199E-9 -2.445930617187124E-11
i 1.106965412340845E-15 -2.469005645778859E-15 -1.308107118486428E-12 2.411671089893044E-11 -2.445930617187124E-11 1.578749610539832E-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 14.4   n/a MPO319208  
diameter diameter 3.753 km 0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.307   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9863 Reichardt (1991 RJ7)          Discovered 1991-Sep-13 by Borngen, F., Schmadel, L. D. at Tautenburg
Reference: 19990106/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1991 RJ7 = 1995 YD3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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