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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1657995351440535 3.6957e-08  
a 1.771471316523701 7.5214e-09 au
q 1.477762195723047 6.4559e-08 au
i 20.55490465374082 6.9586e-06 deg
node 217.8950702456954 1.0805e-05 deg
peri 289.5540756924294 2.2673e-05 deg
M 94.29032463919307 2.2206e-05 deg
tp 2458774.938879088099
(2019-Oct-18.43887909)
5.2406e-05 TDB
period 861.1912604926119
2.36
5.4847e-06
1.502e-08
d
yr
n .4180256076844946 2.6623e-09 deg/d
Q 2.065180437324355 8.7684e-09 au
  Orbit Determination Parameters
   # obs. used (total)      275  
   data-arc span      10831 days (29.65 yr)  
   first obs. used      1990-10-22  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5264  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 04:39:56  

Additional Information
 Earth MOID = .573231 au 
 Jupiter MOID = 3.04724 au 
 T_jup = 4.015 
[ show covariance matrix ]

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

[ 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
1972-Dec-28 04:46 < 00:01 Mars 0.0581579495798641 0.0581562103967471 0.0581596889526767 10.5008260285743 10.5003572331855 2441679.698274334 0.249491238328469 189.105376186969 14.6376151643577 -63.0365330546941 531706.913936144 T 13 CATAB v2.0f-lin.ifort 2020-Jun-24 04:40:09 2020-Jun-24 04:40
2140-May-19 06:45 < 00:01 Mars 0.0750542426082387 0.0750450022506931 0.0750634834668146 10.2470800344774 10.2467077810541 2502817.781343693 0.795908268326245 553.102145043088 13.6090135254606 -33.592183623081 460234.634843903 T 13 CATAB v2.0f-lin.ifort 2020-Jun-24 04:40:09 2020-Jun-24 04:40
2149-Oct-19 23:00 < 00:01 Mars 0.078552831784696 0.0785429627616007 0.0785627013465503 11.2044544652405 11.2041291833172 2506258.458102209 0.814813059134411 589.535183297457 15.840973882333 33.419400901328 404966.045326806 T 13 CATAB v2.0f-lin.ifort 2020-Jun-24 04:40:09 2020-Jun-24 04:40
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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