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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2174888485834972 5.1682e-08  
a 2.570443530218392 1.0944e-08 au
q 2.011400726482294 1.3689e-07 au
i 8.170115573116298 3.2861e-06 deg
node 132.7092337526687 3.5891e-05 deg
peri 287.198533449721 3.7043e-05 deg
M 212.3078482567972 1.0321e-05 deg
tp 2460014.040499784822
(2023-Mar-10.54049978)
4.5627e-05 TDB
period 1505.256557634028
4.12
9.6135e-06
2.632e-08
d
yr
n .2391618878351544 1.5274e-09 deg/d
Q 3.12948633395449 1.3325e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1203  
   data-arc span      9184 days (25.14 yr)  
   first obs. used      1996-06-17  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53353  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 00:43:50  

Additional Information
 Earth MOID = 1.04166 au 
 Jupiter MOID = 2.2562 au 
 T_jup = 3.382 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457377.5 (2015-Dec-21.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2162128330951461 5.1397e-08  
q 2.016746307718495 1.3599e-07 au
tp 2457003.929750661421
(2014-Dec-12.42975066)
3.7103e-05 TDB
node 132.7556251930823 3.5857e-05 deg
peri 287.5297358896563 3.7042e-05 deg
i 8.170533438170802 3.2867e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1203  
   data-arc span      9184 days (25.14 yr)  
   first obs. used      1996-06-17  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53353  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 00:43:50  

Additional Information
 Jupiter MOID = 2.2562 au 
 T_jup = 3.382 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.641667880183584E-15 -6.977967076049577E-15 -1.041044281848792E-12 -2.452222813353096E-14 -2.907547565372227E-13 -8.350223897238494E-15
q -6.977967076049577E-15 1.8492341314772E-14 2.754390845877451E-12 6.583803785766012E-14 7.702994757725008E-13 2.228556468519492E-14
tp -1.041044281848792E-12 2.754390845877451E-12 1.376666029888954E-9 1.391013780450243E-11 3.779923136855343E-10 4.110317209738345E-12
node -2.452222813353096E-14 6.583803785766012E-14 1.391013780450243E-11 1.285739548028661E-9 -1.26896486479257E-9 1.601575756266747E-11
peri -2.907547565372227E-13 7.702994757725008E-13 3.779923136855343E-10 -1.26896486479257E-9 1.372104585271579E-9 -1.465790198999653E-11
i -8.350223897238494E-15 2.228556468519492E-14 4.110317209738345E-12 1.601575756266747E-11 -1.465790198999653E-11 1.080237071865968E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.83   n/a E2021B10  

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

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