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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04791723222081557 3.5599e-08  
a 2.965256554611418 1.8195e-08 au
q 2.823169667689807 1.1117e-07 au
i 10.6922576254643 4.6561e-06 deg
node 71.32495942758479 2.9755e-05 deg
peri 43.0769404761455 7.213e-05 deg
M 338.0745126158865 6.5347e-05 deg
tp 2459314.089606248254
(2021-Apr-09.58960625)
0.00033876 TDB
period 1865.055838120191
5.11
1.7166e-05
4.7e-08
d
yr
n .1930237114846104 1.7766e-09 deg/d
Q 3.107343441533029 1.9066e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1163  
   data-arc span      12740 days (34.88 yr)  
   first obs. used      1986-03-04  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53481  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:54:55  

Additional Information
 Earth MOID = 1.84958 au 
 Jupiter MOID = 2.03029 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 14.1   n/a MPO358837  

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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