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20549 (1999 RH110)
Classification: Main-belt Asteroid          SPK-ID: 2020549
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08016318699489189 3.4232e-08  
a 3.004410470363687 1.6443e-08 au
q 2.763567352018511 1.0817e-07 au
i 8.910329691414836 3.5074e-06 deg
node 254.9440511419803 2.3419e-05 deg
peri 175.4420139959897 3.3297e-05 deg
M 337.591303868944 2.292e-05 deg
tp 2459318.899921329186
(2021-Apr-14.39992133)
0.00012113 TDB
period 1902.117438213418
5.21
1.5616e-05
4.275e-08
d
yr
n .1892627619975628 1.5538e-09 deg/d
Q 3.245253588708862 1.7761e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2030  
   data-arc span      11422 days (31.27 yr)  
   first obs. used      1989-11-28  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43241  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:43  

Additional Information
 Earth MOID = 1.77765 au 
 Jupiter MOID = 2.01489 au 
 T_jup = 3.228 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.45   n/a E2021B10  

20549 (1999 RH110)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RH110 = 1989 WN4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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