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12021 (1996 XX19)
Classification: Main-belt Asteroid          SPK-ID: 2012021
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1605278189348531 3.6796e-08  
a 2.240044377819372 6.0271e-09 au
q 1.880454939530748 8.2265e-08 au
i 4.019419788233425 3.2092e-06 deg
node 102.1373280572686 5.9634e-05 deg
peri 251.2727556222797 6.0599e-05 deg
M 82.54156489803719 1.0282e-05 deg
tp 2458719.728153660965
(2019-Aug-24.22815366)
3.5047e-05 TDB
period 1224.569279815728
3.35
4.9423e-06
1.353e-08
d
yr
n .2939809171549466 1.1865e-09 deg/d
Q 2.599633816107996 6.9946e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1677  
   data-arc span      18110 days (49.58 yr)  
   first obs. used      1971-04-16  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52464  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 20:17:43  

Additional Information
 Earth MOID = .879719 au 
 Jupiter MOID = 2.82912 au 
 T_jup = 3.615 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456808.5 (2014-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .16124630276292 3.6894e-08  
q 1.878601817158235 8.258e-08 au
tp 2456271.229801936530
(2012-Dec-09.72980194)
3.6925e-05 TDB
node 102.1786748734109 5.968e-05 deg
peri 251.2771298032796 6.063e-05 deg
i 4.018421874412384 3.208e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1677  
   data-arc span      18110 days (49.58 yr)  
   first obs. used      1971-04-16  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52464  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 20:17:43  

Additional Information
 Jupiter MOID = 2.82912 au 
 T_jup = 3.615 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.361203084848498E-15 -3.041000135453628E-15 2.948284928905184E-13 6.744838046977623E-17 9.287787272136794E-14 -1.779302339905466E-15
q -3.041000135453628E-15 6.819518190508544E-15 -7.279311927265353E-13 3.794922351122187E-16 -2.257308176784663E-13 4.055142035346822E-15
tp 2.948284928905184E-13 -7.279311927265353E-13 1.363470254231675E-9 1.647619872045912E-12 4.123228009480891E-10 -6.316423962255722E-13
node 6.744838046977623E-17 3.794922351122187E-16 1.647619872045912E-12 3.561729741723662E-9 -3.552226318409107E-9 -1.781946728188768E-11
peri 9.287787272136794E-14 -2.257308176784663E-13 4.123228009480891E-10 -3.552226318409107E-9 3.675937218518821E-9 1.756705858361275E-11
i -1.779302339905466E-15 4.055142035346822E-15 -6.316423962255722E-13 -1.781946728188768E-11 1.756705858361275E-11 1.029125200559574E-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 14.9   n/a MPO502260  
diameter diameter 2.741 km 0.124 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.310   0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12021 (1996 XX19)          Discovered 1996-Dec-12 by Kobayashi, T. at Oizumi
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1996 XX19 = 1992 PQ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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