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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09605003674812183 4.1622e-08  
a 3.030785911490813 1.9199e-08 au
q 2.73967881331643 1.2379e-07 au
i 12.13619580341238 5.1904e-06 deg
node 53.17521864373779 1.7943e-05 deg
peri 289.6702962406534 3.1429e-05 deg
M 92.69529206409371 2.5281e-05 deg
tp 2458900.266027621700
(2020-Feb-20.76602762)
0.00013515 TDB
period 1927.220100160701
5.28
1.8312e-05
5.014e-08
d
yr
n .1867975536213956 1.7749e-09 deg/d
Q 3.321893009665196 2.1043e-08 au
  Orbit Determination Parameters
   # obs. used (total)      727  
   data-arc span      7785 days (21.31 yr)  
   first obs. used      1999-10-10  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54265  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:41:05  

Additional Information
 Earth MOID = 1.76247 au 
 Jupiter MOID = 2.08721 au 
 T_jup = 3.202 
[ 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 14.95   n/a MPCxxxxx  

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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