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42791 (1999 AD6)
Classification: Main-belt Asteroid          SPK-ID: 2042791
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2174946021933553 5.8806e-08  
a 2.570554583317649 1.1081e-08 au
q 2.011472836802671 1.5487e-07 au
i 8.170069835969283 3.5476e-06 deg
node 132.708434457134 3.9797e-05 deg
peri 287.2766291652388 4.1544e-05 deg
M 117.4872886592511 1.1815e-05 deg
tp 2458509.222298261070
(2019-Jan-25.72229826)
4.8019e-05 TDB
period 1505.354108042809
4.12
9.7339e-06
2.665e-08
d
yr
n .2391463895947081 1.5464e-09 deg/d
Q 3.129636329832628 1.3491e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1143  
   data-arc span      8712 days (23.85 yr)  
   first obs. used      1996-06-17  
   last obs. used      2020-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52998  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 09:08:57  

Additional Information
 Earth MOID = 1.04207 au 
 Jupiter MOID = 2.2542 au 
 T_jup = 3.382 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457035.5 (2015-Jan-13.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2156314164117131 5.8444e-08  
q 2.017220054238849 1.5358e-07 au
tp 2457003.653950608203
(2014-Dec-12.15395061)
4.5939e-05 TDB
node 132.7607676605824 3.9745e-05 deg
peri 287.4674610586486 4.1544e-05 deg
i 8.17221092189938 3.5485e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1143  
   data-arc span      8712 days (23.85 yr)  
   first obs. used      1996-06-17  
   last obs. used      2020-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52998  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 09:08:57  

Additional Information
 Jupiter MOID = 2.2542 au 
 T_jup = 3.382 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.415755746318712E-15 -8.964115398382715E-15 -1.749231044240143E-12 -5.954512968861776E-14 -4.862847121812328E-13 -1.34092866938124E-14
q -8.964115398382715E-15 2.358826101860921E-14 4.568180010435859E-12 1.574916770979951E-13 1.268899257746144E-12 3.547165367927098E-14
tp -1.749231044240143E-12 4.568180010435859E-12 2.110410838103705E-9 3.549238054054322E-11 5.974105043476178E-10 7.916564787131678E-12
node -5.954512968861776E-14 1.574916770979951E-13 3.549238054054322E-11 1.579625382470949E-9 -1.553172715477245E-9 3.553294455708202E-11
peri -4.862847121812328E-13 1.268899257746144E-12 5.974105043476178E-10 -1.553172715477245E-9 1.725908668098025E-9 -3.277314147969296E-11
i -1.34092866938124E-14 3.547165367927098E-14 7.916564787131678E-12 3.553294455708202E-11 -3.277314147969296E-11 1.259160468925597E-11

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 14.8   n/a MPO385088  

42791 (1999 AD6)          Discovered 1999-Jan-15 by Spacewatch at Kitt Peak
Reference: 20020624/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2171-May-01 13:57 00:07 Juno 0.034835781001625 0.0348192625181187 0.0348523397877846 3.2274994548918 3.22749934668507 2514122.080918821 6.59084337849857 2042.29232431001 48.063416414952 66.2548659488743 99102.9330277765 T 22 CATAB v2.0f-lin.ifort 2020-May-20 09:09:08 2020-May-20 09:09

Alternate Designations
 1999 AD6 = 2001 OA26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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