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JPL Small-Body Database Browser
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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3610763096040875 4.8018e-08  
a 2.435885569623849 8.1059e-09 au
q 1.556344997526219 1.1997e-07 au
i 7.776698669917703 6.4127e-06 deg
node 238.0797441893634 3.0173e-05 deg
peri 53.39718468177856 3.1708e-05 deg
M 167.1608919342335 8.3554e-06 deg
tp 2458355.713509168316
(2018-Aug-25.21350917)
3.0375e-05 TDB
period 1388.621070475808
3.80
6.9313e-06
1.898e-08
d
yr
n .2592499909832469 1.2941e-09 deg/d
Q 3.315426141721479 1.1033e-08 au
  Orbit Determination Parameters
   # obs. used (total)      635  
   data-arc span      7555 days (20.68 yr)  
   first obs. used      1999-04-30  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48941  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-30 02:52:33  

Additional Information
 Earth MOID = .556222 au 
 Jupiter MOID = 1.93644 au 
 T_jup = 3.400 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456731.5 (2014-Mar-15.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3612070069651451 4.7834e-08  
q 1.555308579812785 1.1944e-07 au
tp 2456968.526117475316
(2014-Nov-07.02611748)
2.7305e-05 TDB
node 238.104753537718 3.0185e-05 deg
peri 53.48166755133586 3.1726e-05 deg
i 7.77587052842654 6.4125e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      635  
   data-arc span      7555 days (20.68 yr)  
   first obs. used      1999-04-30  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48941  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-30 02:52:33  

Additional Information
 Jupiter MOID = 1.93644 au 
 T_jup = 3.400 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.288112777710526E-15 -5.709808584640204E-15 -7.070842784778915E-13 6.736905525862391E-14 -2.442941057750954E-13 -1.164904836332389E-14
q -5.709808584640204E-15 1.426662671161003E-14 1.768382042300248E-12 -1.700003587491591E-13 6.122312651934446E-13 2.978951652564814E-14
tp -7.070842784778915E-13 1.768382042300248E-12 7.455650852747279E-10 -4.306510717472782E-11 2.793459016950155E-10 4.88295742245342E-12
node 6.736905525862391E-14 -1.700003587491591E-13 -4.306510717472782E-11 9.111176582870124E-10 -9.141243847961356E-10 1.959085861477584E-11
peri -2.442941057750954E-13 6.122312651934446E-13 2.793459016950155E-10 -9.141243847961356E-10 1.006559885257426E-9 -1.823138265638164E-11
i -1.164904836332389E-14 2.978951652564814E-14 4.88295742245342E-12 1.959085861477584E-11 -1.823138265638164E-11 4.111999170242695E-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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