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91854 (1999 UA9)
Classification: Main-belt Asteroid          SPK-ID: 2091854
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09598101176813742 4.7967e-08  
a 3.029628657783577 2.7477e-08 au
q 2.738841833927765 1.4595e-07 au
i 12.138257483521 5.5321e-06 deg
node 53.17547442754385 2.3419e-05 deg
peri 289.4309498361975 3.7467e-05 deg
M 18.92690842782626 3.1886e-05 deg
tp 2458899.234920655552
(2020-Feb-19.73492066)
0.00017001 TDB
period 1926.116391539403
5.27
2.6203e-05
7.174e-08
d
yr
n .1869045928799134 2.5426e-09 deg/d
Q 3.320415481639388 3.0114e-08 au
  Orbit Determination Parameters
   # obs. used (total)      477  
   data-arc span      6796 days (18.61 yr)  
   first obs. used      1999-10-10  
   last obs. used      2018-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5909  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-31 15:41:16  

Additional Information
 Earth MOID = 1.76247 au 
 Jupiter MOID = 2.08926 au 
 T_jup = 3.203 
[ 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 14.8   n/a MPO439646  

91854 (1999 UA9)          Discovered 1999-Oct-29 by CSS at Catalina
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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