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216929 (1998 QR99)
Classification: Main-belt Asteroid          SPK-ID: 2216929
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2291026250903514 5.8893e-08  
a 2.408137702954456 1.2261e-08 au
q 1.856427033628541 1.3945e-07 au
i 3.320287328679035 4.8968e-06 deg
node 122.79676896 0.00010099 deg
peri 240.7038823763083 0.00010152 deg
M 337.607424231228 1.3258e-05 deg
tp 2459285.402788538565
(2021-Mar-11.90278854)
5.0671e-05 TDB
period 1364.961502843661
3.74
1.0425e-05
2.854e-08
d
yr
n .2637437021117461 2.0143e-09 deg/d
Q 2.959848372280371 1.5071e-08 au
  Orbit Determination Parameters
   # obs. used (total)      287  
   data-arc span      7525 days (20.60 yr)  
   first obs. used      1998-08-26  
   last obs. used      2019-04-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .65636  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:50  

Additional Information
 Earth MOID = .85515 au 
 Jupiter MOID = 2.50052 au 
 T_jup = 3.483 
[ 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 17.0   n/a MPO433420  

216929 (1998 QR99)          Discovered 1998-Aug-26 by Elst, E. W. at La Silla
Reference: 20090806/Numbers.arcLast Updated: 2009-08-09

[ show close-approach data ]
Alternate Designations
 1998 QR99 = 2002 VS78 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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