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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 ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1660988290998234 3.4151e-08  
a 1.771161632510496 7.3878e-09 au
q 1.476973759203971 5.9015e-08 au
i 20.55633988522743 5.9882e-06 deg
node 217.8600027319992 1.0682e-05 deg
peri 289.6712184771924 2.1874e-05 deg
M 259.7340031375185 2.2444e-05 deg
tp 2459636.293217944788
(2022-Feb-25.79321794)
5.4556e-05 TDB
period 860.9654435343867
2.36
5.3868e-06
1.475e-08
d
yr
n .4181352488691629 2.6162e-09 deg/d
Q 2.065349505817021 8.6149e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50677  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 02:06:40  

Additional Information
 Earth MOID = .572949 au 
 Jupiter MOID = 3.04489 au 
 T_jup = 4.015 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457761.5 (2017-Jan-08.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1658296730108815 3.4129e-08  
q 1.477622563541584 5.8966e-08 au
tp 2457913.971370740385
(2017-Jun-09.47137074)
4.8981e-05 TDB
node 217.9004281391899 1.0679e-05 deg
peri 289.5789526737308 2.1907e-05 deg
i 20.55680635245393 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50677  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 02:06:40  

Additional Information
 Jupiter MOID = 3.04489 au 
 T_jup = 4.015 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.164788193541814E-15 -2.002285653478821E-15 4.039409938661088E-13 -1.419890979474118E-14 1.798937839770995E-13 -4.365978182193236E-15
q -2.002285653478821E-15 3.476949356619697E-15 -5.799703834135184E-13 2.541198926134924E-14 -2.690493828190965E-13 6.1941247949153E-15
tp 4.039409938661088E-13 -5.799703834135184E-13 2.399164767019107E-9 6.055857030347208E-12 9.417587485957952E-10 -3.420347125606763E-11
node -1.419890979474118E-14 2.541198926134924E-14 6.055857030347208E-12 1.14051122804647E-10 -1.044141156833366E-10 1.141408868834245E-11
peri 1.798937839770995E-13 -2.690493828190965E-13 9.417587485957952E-10 -1.044141156833366E-10 4.798992580910846E-10 -2.430170721039358E-11
i -4.365978182193236E-15 6.1941247949153E-15 -3.420347125606763E-11 1.141408868834245E-11 -2.430170721039358E-11 3.586638909889592E-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 18.07   n/a E2021B55  

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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