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249230 (2008 GZ21)
Classification: Mars-crossing Asteroid          SPK-ID: 2249230
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1657995488360719 3.4097e-08  
a 1.771471315219795 7.3864e-09 au
q 1.47776217038031 5.8903e-08 au
i 20.5549062172652 5.9884e-06 deg
node 217.8950693676248 1.0681e-05 deg
peri 289.5540818333974 2.1913e-05 deg
M 94.29032124974779 2.1908e-05 deg
tp 2458774.938887445363
(2019-Oct-18.43888745)
5.1647e-05 TDB
period 861.1912595417814
2.36
5.3863e-06
1.475e-08
d
yr
n .4180256081460315 2.6145e-09 deg/d
Q 2.06518046005928 8.6111e-09 au
  Orbit Determination Parameters
   # obs. used (total)      306  
   data-arc span      10896 days (29.83 yr)  
   first obs. used      1990-10-22  
   last obs. used      2020-08-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50674  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:19:22  

Additional Information
 Earth MOID = .573231 au 
 Jupiter MOID = 3.04724 au 
 T_jup = 4.015 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457761.5 (2017-Jan-08.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1658296728226082 3.4129e-08  
q 1.477622563693805 5.8966e-08 au
tp 2457913.971370290122
(2017-Jun-09.47137029)
4.8981e-05 TDB
node 217.9004281376596 1.0679e-05 deg
peri 289.5789525298579 2.1907e-05 deg
i 20.55680636504511 5.9889e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      306  
   data-arc span      10896 days (29.83 yr)  
   first obs. used      1990-10-22  
   last obs. used      2020-08-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50674  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:19:22  

Additional Information
 Jupiter MOID = 3.04724 au 
 T_jup = 4.015 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.164789222138185E-15 -2.002286322709348E-15 4.039425689674545E-13 -1.419889526682971E-14 1.798945590801977E-13 -4.365998187601941E-15
q -2.002286322709348E-15 3.476949426330368E-15 -5.799708955460038E-13 2.541197227702292E-14 -2.69049795564584E-13 6.194133925689009E-15
tp 4.039425689674545E-13 -5.799708955460038E-13 2.399166746399729E-9 6.055885481306532E-12 9.417596013183095E-10 -3.420349758746403E-11
node -1.419889526682971E-14 2.541197227702292E-14 6.055885481306532E-12 1.140511198002391E-10 -1.044141028593955E-10 1.141409124537839E-11
peri 1.798945590801977E-13 -2.69049795564584E-13 9.417596013183095E-10 -1.044141028593955E-10 4.798996482927467E-10 -2.430172077602165E-11
i -4.365998187601941E-15 6.194133925689009E-15 -3.420349758746403E-11 1.141409124537839E-11 -2.430172077602165E-11 3.586639264091976E-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 18.0   n/a MPO454846  

249230 (2008 GZ21)          Discovered 2008-Apr-06 by CSS at Catalina
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

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