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181804 (1998 QO81)
Classification: Main-belt Asteroid          SPK-ID: 2181804
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2330418943160045 3.1819e-08  
a 3.138928344910833 2.4357e-08 au
q 2.407426537290612 1.0222e-07 au
i 16.63787892182905 5.0845e-06 deg
node 174.4559230779842 1.3885e-05 deg
peri 133.2117884512805 1.8077e-05 deg
M 18.20837763531209 1.1699e-05 deg
tp 2459097.760066399543
(2020-Sep-05.26006640)
6.5486e-05 TDB
period 2031.28344748494
5.56
2.3643e-05
6.473e-08
d
yr
n .1772278509164926 2.0628e-09 deg/d
Q 3.870430152531054 3.0033e-08 au
  Orbit Determination Parameters
   # obs. used (total)      605  
   data-arc span      8160 days (22.34 yr)  
   first obs. used      1998-08-02  
   last obs. used      2020-12-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55626  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:06  

Additional Information
 Earth MOID = 1.42471 au 
 Jupiter MOID = 1.71156 au 
 T_jup = 3.105 
[ 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 14.98   n/a E2021B55  

181804 (1998 QO81)          Discovered 1998-Aug-24 by LINEAR at Socorro
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 1998 QO81 = 2004 RA78 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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