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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08945041271554904 3.7412e-08  
a 2.711725476117941 1.0972e-08 au
q 2.469160513107922 1.0397e-07 au
i 3.10018506031703 3.9177e-06 deg
node 167.9948445400082 6.0708e-05 deg
peri 219.9614721545479 6.3422e-05 deg
M 290.9824542538304 1.974e-05 deg
tp 2459709.197219664216
(2022-May-09.69721966)
9.0187e-05 TDB
period 1631.049001555744
4.47
9.899e-06
2.71e-08
d
yr
n .2207168513371585 1.3396e-09 deg/d
Q 2.95429043912796 1.1953e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1830  
   data-arc span      11269 days (30.85 yr)  
   first obs. used      1990-08-16  
   last obs. used      2021-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54803  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:55:41  

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 14.33   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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