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20749 (2000 AD199)
Classification: Main-belt Asteroid          SPK-ID: 2020749
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1515322717653699 3.8914e-08  
a 2.451264887493094 8.4691e-09 au
q 2.079819150392582 9.7884e-08 au
i 14.30731454160717 4.2938e-06 deg
node 152.554930190077 1.5022e-05 deg
peri 43.84416780450272 1.9507e-05 deg
M 333.4623463192147 1.4262e-05 deg
tp 2459103.834136523784
(2020-Sep-11.33413652)
5.5771e-05 TDB
period 1401.792697878841
3.84
7.2648e-06
1.989e-08
d
yr
n .2568140071957453 1.3309e-09 deg/d
Q 2.822710624593606 9.7524e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1783  
   data-arc span      23833 days (65.25 yr)  
   first obs. used      1955-03-23  
   last obs. used      2020-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45349  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:00:54  

Additional Information
 Earth MOID = 1.10403 au 
 Jupiter MOID = 2.18343 au 
 T_jup = 3.438 
[ 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 13.9   n/a MPO467948  
diameter diameter 6.375 km 0.125 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 12. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Lagerkvist, C.-I.; Sjolander, N.-G. (1979) Acta Astron. 29, 455-461.]
geometric albedo albedo 0.109   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20749 (2000 AD199)          Discovered 2000-Jan-09 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 2000 AD199 = 1978 ED = 1982 HH2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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