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16981 (1999 AU7)
Classification: Main-belt Asteroid          SPK-ID: 2016981
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06938134060018283 3.9163e-08  
a 2.190160966363877 5.8498e-09 au
q 2.038204662387359 8.5185e-08 au
i 4.977822047989386 4.1279e-06 deg
node 43.64609313440413 3.5345e-05 deg
peri 204.2574661047336 4.188e-05 deg
M 169.4964987847828 2.3387e-05 deg
tp 2458643.095193163435
(2019-Jun-08.59519316)
7.6537e-05 TDB
period 1183.893070947486
3.24
4.7431e-06
1.299e-08
d
yr
n .3040815161726447 1.2183e-09 deg/d
Q 2.342117270340395 6.2556e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1782  
   data-arc span      15466 days (42.34 yr)  
   first obs. used      1978-11-05  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48413  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:50:11  

Additional Information
 Earth MOID = 1.0243 au 
 Jupiter MOID = 2.65555 au 
 T_jup = 3.665 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.74   n/a E2021B10  
diameter diameter 3.292 km 0.109 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.258   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16981 (1999 AU7)          Discovered 1999-Jan-11 by Kagawa, T. at Gekko
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 AU7 = 1978 VA3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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