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249221 (2008 EZ99)
Classification: Outer Main-belt Asteroid          SPK-ID: 2249221
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1263003070955364 4.6657e-08  
a 3.204022259271423 3.5616e-08 au
q 2.799353263984508 1.4768e-07 au
i 23.20555958737651 6.5859e-06 deg
node 40.16684526164165 1.2319e-05 deg
peri 61.58634865264001 3.263e-05 deg
M 111.7167136312918 2.8374e-05 deg
tp 2458350.434130858020
(2018-Aug-19.93413086)
0.00016226 TDB
period 2094.795892971584
5.74
3.4928e-05
9.563e-08
d
yr
n .1718544518861549 2.8655e-09 deg/d
Q 3.608691254558338 4.0114e-08 au
  Orbit Determination Parameters
   # obs. used (total)      537  
   data-arc span      8393 days (22.98 yr)  
   first obs. used      1997-05-06  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49686  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 13:41:44  

Additional Information
 Earth MOID = 1.88568 au 
 Jupiter MOID = 1.91184 au 
 T_jup = 3.055 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457852.5 (2017-Apr-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1271600789190828 4.6584e-08  
q 2.798228571881933 1.477e-07 au
tp 2458351.178666903973
(2018-Aug-20.67866690)
0.00016122 TDB
node 40.17376435907479 1.2317e-05 deg
peri 61.72346705981709 3.2439e-05 deg
i 23.20576333763253 6.586e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      537  
   data-arc span      8393 days (22.98 yr)  
   first obs. used      1997-05-06  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49686  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 13:41:44  

Additional Information
 Jupiter MOID = 1.91184 au 
 T_jup = 3.055 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.170101459991701E-15 -6.729022284302586E-15 -1.932857144021968E-12 4.717671653612903E-15 -4.360928635811471E-13 -1.48352054501942E-14
q -6.729022284302586E-15 2.181399241981588E-14 7.346151437736402E-12 -1.759426294946749E-14 1.554208079822208E-12 4.550429256427976E-14
tp -1.932857144021968E-12 7.346151437736402E-12 2.599235596456281E-8 -6.507518810545166E-12 4.848230852166482E-9 -2.198160647627742E-11
node 4.717671653612903E-15 -1.759426294946749E-14 -6.507518810545166E-12 1.516990543887068E-10 -1.402571978603581E-10 -8.243972516284837E-12
peri -4.360928635811471E-13 1.554208079822208E-12 4.848230852166482E-9 -1.402571978603581E-10 1.052287143111189E-9 4.171841957629931E-12
i -1.48352054501942E-14 4.550429256427976E-14 -2.198160647627742E-11 -8.243972516284837E-12 4.171841957629931E-12 4.337559838652863E-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 14.8   n/a MPO254459  
diameter diameter 8.204 km 0.243 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.042   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249221 (2008 EZ99)          Discovered 2008-Mar-06 by CSS at Catalina
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

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