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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 ]

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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.


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 
[ show covariance matrix ]

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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