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21882 (1999 UL16)
Classification: Main-belt Asteroid          SPK-ID: 2021882
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2030670094734439 4.3701e-08  
a 2.460000184215301 9.5786e-09 au
q 1.960455303502579 1.0533e-07 au
i 1.848310976133157 4.9971e-06 deg
node 342.3708191251868 9.6468e-05 deg
peri 321.4250783054644 9.6965e-05 deg
M 241.8853652190643 9.4022e-06 deg
tp 2459662.883520150839
(2022-Mar-24.38352015)
3.7945e-05 TDB
period 1409.292485753587
3.86
8.2311e-06
2.254e-08
d
yr
n .2554473281020145 1.492e-09 deg/d
Q 2.959545064928024 1.1524e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1072  
   data-arc span      10715 days (29.34 yr)  
   first obs. used      1991-09-13  
   last obs. used      2021-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54815  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:54:53  

Additional Information
 Earth MOID = .943663 au 
 Jupiter MOID = 2.28331 au 
 T_jup = 3.461 
[ 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 15.3   n/a MPO492979  

21882 (1999 UL16)          Discovered 1999-Oct-29 by CSS at Catalina
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 UL16 = 1991 RG18 = 1998 HY60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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