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118309 (1998 VR9)
Classification: Main-belt Asteroid          SPK-ID: 2118309
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1869302123750302 4.1037e-08  
a 2.256984176456045 1.0011e-08 au
q 1.835085645024033 9.337e-08 au
i 4.650003204907907 4.2761e-06 deg
node 17.61125222656995 5.7341e-05 deg
peri 300.3125776914085 5.8444e-05 deg
M 242.1259103850128 1.1127e-05 deg
tp 2459606.015117343864
(2022-Jan-26.51511734)
3.8589e-05 TDB
period 1238.486275657561
3.39
8.2403e-06
2.256e-08
d
yr
n .2906774237840156 1.934e-09 deg/d
Q 2.678882707888056 1.1883e-08 au
  Orbit Determination Parameters
   # obs. used (total)      701  
   data-arc span      8158 days (22.34 yr)  
   first obs. used      1998-10-10  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50855  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:56:39  

Additional Information
 Earth MOID = .825526 au 
 Jupiter MOID = 2.62814 au 
 T_jup = 3.595 
[ 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 16.27   n/a E2021B55  

118309 (1998 VR9)          Discovered 1998-Nov-10 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1998 VR9 = 2003 AG21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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