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21881 (1999 UK15)
Classification: Main-belt Asteroid          SPK-ID: 2021881
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08694416494420765 4.2863e-08  
a 2.768424174698175 1.329e-08 au
q 2.527725846617686 1.2185e-07 au
i 2.470959381161975 3.3571e-06 deg
node 92.56073292730264 0.00011453 deg
peri 285.8874034036422 0.00011655 deg
M 266.9825615476437 2.3302e-05 deg
tp 2459831.219629708767
(2022-Sep-08.71962971)
0.00011022 TDB
period 1682.470183000313
4.61
1.2115e-05
3.317e-08
d
yr
n .2139711025119148 1.5408e-09 deg/d
Q 3.009122502778665 1.4445e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1432  
   data-arc span      10712 days (29.33 yr)  
   first obs. used      1992-03-06  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52277  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:04:34  

Additional Information
 Earth MOID = 1.53017 au 
 Jupiter MOID = 2.41661 au 
 T_jup = 3.331 
[ 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 14.36   n/a MPCxxxxx  
diameter diameter 3.802 km 0.502 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.212   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21881 (1999 UK15)          Discovered 1999-Oct-29 by CSS at Catalina
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 UK15 = 1992 EM11 = 1995 YT24 = 1997 EZ58 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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