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21890 (1999 UG50)
Classification: Main-belt Asteroid          SPK-ID: 2021890
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04802072774335683 3.5556e-08  
a 2.965600338567658 1.8163e-08 au
q 2.823190052113693 1.111e-07 au
i 10.69129619472223 4.6246e-06 deg
node 71.32055103525578 2.9467e-05 deg
peri 42.94461211546461 7.1298e-05 deg
M 16.02846350853984 6.4546e-05 deg
tp 2459313.446726844309
(2021-Apr-08.94672684)
0.0003343 TDB
period 1865.380191939095
5.11
1.7137e-05
4.692e-08
d
yr
n .1929901483652905 1.773e-09 deg/d
Q 3.108010625021622 1.9035e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1191  
   data-arc span      12871 days (35.24 yr)  
   first obs. used      1986-03-04  
   last obs. used      2021-05-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53555  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:11:50  

Additional Information
 Earth MOID = 1.84995 au 
 Jupiter MOID = 2.02938 au 
 T_jup = 3.237 
[ 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 14.18   n/a MPCxxxxx  

21890 (1999 UG50)          Discovered 1999-Oct-30 by CSS at Catalina
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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