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19989 (1990 RN8)
Classification: Main-belt Asteroid          SPK-ID: 2019989
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08945041236566002 3.5187e-08  
a 2.711725475962707 1.0544e-08 au
q 2.469160513915377 9.9014e-08 au
i 3.100187254976355 3.7569e-06 deg
node 167.9948852155201 5.7109e-05 deg
peri 219.961431269202 5.9907e-05 deg
M 290.9824546077035 1.926e-05 deg
tp 2459709.197218034076
(2022-May-09.69721803)
8.7911e-05 TDB
period 1631.049001415689
4.47
9.5131e-06
2.605e-08
d
yr
n .2207168513561111 1.2873e-09 deg/d
Q 2.954290438010037 1.1487e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1927  
   data-arc span      11316 days (30.98 yr)  
   first obs. used      1990-08-16  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53704  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:29:09  

Additional Information
 Earth MOID = 1.47371 au 
 Jupiter MOID = 2.44281 au 
 T_jup = 3.355 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457358.5 (2015-Dec-02.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08980529613065687 3.4913e-08  
q 2.465619510600375 9.7908e-08 au
tp 2458085.870811585746
(2017-Nov-28.37081159)
8.5503e-05 TDB
node 168.055738916692 5.718e-05 deg
peri 221.2841176113286 6.0017e-05 deg
i 3.098793116871661 3.7561e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1927  
   data-arc span      11316 days (30.98 yr)  
   first obs. used      1990-08-16  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53704  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:29:09  

Additional Information
 Jupiter MOID = 2.44281 au 
 T_jup = 3.355 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.218887471149748E-15 -3.403386635698613E-15 -8.010688636887438E-13 -4.014208701249095E-15 -1.610736622160724E-13 -9.602979495464254E-18
q -3.403386635698613E-15 9.585996836869374E-15 2.363624059000041E-12 1.195647035477597E-14 4.676292282991456E-13 1.16737428958195E-16
tp -8.010688636887438E-13 2.363624059000041E-12 7.310707963516274E-9 2.94309866184886E-12 1.566927932329765E-9 8.066323558992033E-14
node -4.014208701249095E-15 1.195647035477597E-14 2.94309866184886E-12 3.269585547592272E-9 -3.263839101602616E-9 2.230134293082489E-11
peri -1.610736622160724E-13 4.676292282991456E-13 1.566927932329765E-9 -3.263839101602616E-9 3.602095493980206E-9 -2.225649218924225E-11
i -9.602979495464254E-18 1.16737428958195E-16 8.066323558992033E-14 2.230134293082489E-11 -2.225649218924225E-11 1.410811915639422E-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 14.34   n/a MPO636365  
diameter diameter 3.601 km 0.695 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.260   0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19989 (1990 RN8)          Discovered 1990-Sep-15 by Debehogne, H. at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 RN8 = 1986 WF4 = 1999 RN27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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