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JPL Small-Body Database Browser
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39535 (1990 RX7)
Classification: Main-belt Asteroid          SPK-ID: 2039535
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04777499550111474 3.1865e-08  
a 2.741486486161435 1.329e-08 au
q 2.610511981618706 8.7185e-08 au
i 6.058407294885814 4.3718e-06 deg
node 161.2953848256575 3.1375e-05 deg
peri 296.9295881454059 5.5174e-05 deg
M 88.51522908022844 4.463e-05 deg
tp 2458592.844704824591
(2019-Apr-19.34470482)
0.0002053 TDB
period 1657.973523743925
4.54
1.2056e-05
3.301e-08
d
yr
n .2171325385142894 1.5789e-09 deg/d
Q 2.872460990704164 1.3925e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1289  
   data-arc span      10819 days (29.62 yr)  
   first obs. used      1990-09-14  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49629  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:43:57  

Additional Information
 Earth MOID = 1.63414 au 
 Jupiter MOID = 2.19323 au 
 T_jup = 3.340 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457285.5 (2015-Sep-20.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04822523193325333 3.2039e-08  
q 2.610604902908011 8.793e-08 au
tp 2456941.652350764638
(2014-Oct-11.15235076)
0.00020191 TDB
node 161.3091163720386 3.137e-05 deg
peri 298.5623527643559 5.4622e-05 deg
i 6.057937373040332 4.3719e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1289  
   data-arc span      10819 days (29.62 yr)  
   first obs. used      1990-09-14  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49629  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:43:57  

Additional Information
 Jupiter MOID = 2.19323 au 
 T_jup = 3.340 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.026509316745104E-15 -2.78811229465961E-15 9.47259773793137E-13 -1.302633116530116E-15 1.943591069042444E-13 -1.092288981624673E-15
q -2.78811229465961E-15 7.731608883147391E-15 -2.622316195073944E-12 3.378043669027228E-15 -5.32969636200257E-13 3.215716786821896E-15
tp 9.47259773793137E-13 -2.622316195073944E-12 4.076884828291525E-8 -6.907076603930535E-12 9.03698058643405E-9 1.651521450468507E-12
node -1.302633116530116E-15 3.378043669027228E-15 -6.907076603930535E-12 9.840562406278638E-10 -9.798588260665166E-10 1.863871147965306E-12
peri 1.943591069042444E-13 -5.32969636200257E-13 9.03698058643405E-9 -9.798588260665166E-10 2.983510603975996E-9 -1.453440455576495E-12
i -1.092288981624673E-15 3.215716786821896E-15 1.651521450468507E-12 1.863871147965306E-12 -1.453440455576495E-12 1.911343263955283E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.7   n/a MPO431946  
diameter diameter 6.460 km 0.127 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.074   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39535 (1990 RX7)          Discovered 1990-Sep-14 by Debehogne, H. at La Silla
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 RX7 = 1995 UW74 = 1999 RK77 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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