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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08977916558368121 3.9756e-08  
a 2.709784519453464 1.1264e-08 au
q 2.466502326385355 1.0968e-07 au
i 3.099004050608404 4.0908e-06 deg
node 168.0291791860285 6.3359e-05 deg
peri 220.3950772500295 6.6e-05 deg
M 247.2587250510933 1.9943e-05 deg
tp 2459710.747639162412
(2022-May-11.24763916)
9.1561e-05 TDB
period 1629.298144638817
4.46
1.0159e-05
2.781e-08
d
yr
n .2209540354443875 1.3776e-09 deg/d
Q 2.953066712521573 1.2275e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1762  
   data-arc span      10978 days (30.06 yr)  
   first obs. used      1990-08-16  
   last obs. used      2020-09-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55219  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:05:27  

Additional Information
 Earth MOID = 1.47068 au 
 Jupiter MOID = 2.4427 au 
 T_jup = 3.356 
[ 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 14.33   n/a E2021B10  
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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