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99919 (1999 RR31)
Classification: Main-belt Asteroid          SPK-ID: 2099919
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2031676165747368 3.7835e-08  
a 2.245592475332465 6.2167e-09 au
q 1.789360804321005 8.6e-08 au
i 5.352922107667305 3.7265e-06 deg
node 22.77459380892696 3.5508e-05 deg
peri 306.4210671335426 3.6291e-05 deg
M 140.5115267082876 7.237e-06 deg
tp 2458720.761806715514
(2019-Aug-25.26180672)
2.4807e-05 TDB
period 1229.121579049988
3.37
5.1041e-06
1.397e-08
d
yr
n .2928920996393629 1.2163e-09 deg/d
Q 2.701824146343925 7.4798e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1459  
   data-arc span      8421 days (23.06 yr)  
   first obs. used      1998-02-28  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49569  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:30:39  

Additional Information
 Earth MOID = .783121 au 
 Jupiter MOID = 2.66255 au 
 T_jup = 3.598 
[ 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 15.32   n/a MPCxxxxx  

99919 (1999 RR31)          Discovered 1999-Sep-08 by Sarounova, L. at Ondrejov
Reference: 20050622/Numbers.arcLast Updated: 2005-06-27

Alternate Designations
 1999 RR31 = 1998 FD51 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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