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181807 (1998 QA97)
Classification: Main-belt Asteroid          SPK-ID: 2181807
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .19610005246566 5.3458e-08  
a 3.142783566194759 2.369e-08 au
q 2.526483543975753 1.7266e-07 au
i 8.6933912650981 5.6628e-06 deg
node 277.6010681635614 2.9391e-05 deg
peri 20.90997036870494 3.4175e-05 deg
M 29.63284120064719 1.2831e-05 deg
tp 2459032.989926155609
(2020-Jul-02.48992616)
7.3182e-05 TDB
period 2035.026819590409
5.57
2.301e-05
6.3e-08
d
yr
n .1769018454864676 2.0002e-09 deg/d
Q 3.759083588413765 2.8336e-08 au
  Orbit Determination Parameters
   # obs. used (total)      640  
   data-arc span      8176 days (22.38 yr)  
   first obs. used      1998-08-19  
   last obs. used      2021-01-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:07  

Additional Information
 Earth MOID = 1.5109 au 
 Jupiter MOID = 1.46886 au 
 T_jup = 3.162 
[ 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 14.89   n/a E2021B55  

181807 (1998 QA97)          Discovered 1998-Aug-19 by LINEAR at Socorro
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 1998 QA97 = 2004 RA198 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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