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243618 (1999 JU61)
Classification: Mars-crossing Asteroid          SPK-ID: 2243618
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3610763123290028 4.784e-08  
a 2.435885569170495 8.0772e-09 au
q 1.556344990598979 1.1951e-07 au
i 7.776698269482006 6.3601e-06 deg
node 238.0797463177511 2.9838e-05 deg
peri 53.39718352377523 3.1325e-05 deg
M 167.1608916741568 8.3326e-06 deg
tp 2458355.713510351511
(2018-Aug-25.21351035)
3.0261e-05 TDB
period 1388.621070088145
3.80
6.9068e-06
1.891e-08
d
yr
n .2592499910556222 1.2895e-09 deg/d
Q 3.315426147742011 1.0994e-08 au
  Orbit Determination Parameters
   # obs. used (total)      639  
   data-arc span      7573 days (20.73 yr)  
   first obs. used      1999-04-30  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49035  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 09:23:01  

Additional Information
 Earth MOID = .556222 au 
 Jupiter MOID = 1.93644 au 
 T_jup = 3.400 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456822.5 (2014-Jun-14.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .361250126660192 4.7652e-08  
q 1.555277253513567 1.1899e-07 au
tp 2456968.515364973208
(2014-Nov-07.01536497)
2.7114e-05 TDB
node 238.1047369297503 2.9849e-05 deg
peri 53.4795927378288 3.1342e-05 deg
i 7.775873302726293 6.3598e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      639  
   data-arc span      7573 days (20.73 yr)  
   first obs. used      1999-04-30  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49035  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 09:23:01  

Additional Information
 Jupiter MOID = 1.93644 au 
 T_jup = 3.400 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.27068985382841E-15 -5.666459610626328E-15 -7.192805119255311E-13 6.343357276993918E-14 -2.47421044207605E-13 -1.085264209685346E-14
q -5.666459610626328E-15 1.415873682260344E-14 1.799840988510612E-12 -1.600587099841294E-13 6.204366612007306E-13 2.778851981514341E-14
tp -7.192805119255311E-13 1.799840988510612E-12 7.351662569753677E-10 -4.085684881616275E-11 2.713801066340148E-10 4.541095030824946E-12
node 6.343357276993918E-14 -1.600587099841294E-13 -4.085684881616275E-11 8.909787507034519E-10 -8.935589091836384E-10 2.327126243587552E-11
peri -2.47421044207605E-13 6.204366612007306E-13 2.713801066340148E-10 -8.935589091836384E-10 9.823408228654497E-10 -2.19558220685167E-11
i -1.085264209685346E-14 2.778851981514341E-14 4.541095030824946E-12 2.327126243587552E-11 -2.19558220685167E-11 4.044708829742371E-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 16.0   n/a MPO450092  

243618 (1999 JU61)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20100726/Numbers.arcLast Updated: 2010-07-28

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