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305990 (2009 JR8)
Classification: Main-belt Asteroid          SPK-ID: 2305990
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1325102201755161 4.3498e-08  
a 2.395479967741123 1.9884e-08 au
q 2.078054389789709 1.0941e-07 au
i 10.47305352696236 5.0899e-06 deg
node 96.37824017622853 4.0045e-05 deg
peri 11.6938556313234 5.307e-05 deg
M 357.3836635619627 3.3519e-05 deg
tp 2458610.341886016154
(2019-May-06.84188602)
0.0001261 TDB
period 1354.213821397294
3.71
1.6861e-05
4.616e-08
d
yr
n .2658368968857131 3.3099e-09 deg/d
Q 2.712905545692538 2.2519e-08 au
  Orbit Determination Parameters
   # obs. used (total)      209  
   data-arc span      5547 days (15.19 yr)  
   first obs. used      2003-11-18  
   last obs. used      2019-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62685  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:14:25  

Additional Information
 Earth MOID = 1.09611 au 
 Jupiter MOID = 2.42105 au 
 T_jup = 3.495 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457277.5 (2015-Sep-12.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .13227389872141 4.3644e-08  
q 2.078565781500162 1.0976e-07 au
tp 2457257.577622457857
(2015-Aug-23.07762246)
0.00012536 TDB
node 96.42358381429118 4.0041e-05 deg
peri 12.03607918281524 5.3067e-05 deg
i 10.47340536493584 5.0898e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      209  
   data-arc span      5547 days (15.19 yr)  
   first obs. used      2003-11-18  
   last obs. used      2019-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62685  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:14:25  

Additional Information
 Jupiter MOID = 2.42105 au 
 T_jup = 3.495 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.904813557718518E-15 -4.733979716539429E-15 4.330025725763442E-13 -7.654720467992443E-15 1.439418073701617E-13 -5.000605501988318E-15
q -4.733979716539429E-15 1.204676692100566E-14 -1.105524573698051E-12 2.299916538515984E-14 -3.66466599499599E-13 1.336147113316103E-14
tp 4.330025725763442E-13 -1.105524573698051E-12 1.571438870064085E-8 1.967585077847266E-10 4.433631229646481E-9 -2.852412241368606E-12
node -7.654720467992443E-15 2.299916538515984E-14 1.967585077847266E-10 1.603310264786318E-9 -1.518185031637286E-9 -1.168985427227567E-11
peri 1.439418073701617E-13 -3.66466599499599E-13 4.433631229646481E-9 -1.518185031637286E-9 2.816071024163427E-9 1.082194189133034E-11
i -5.000605501988318E-15 1.336147113316103E-14 -2.852412241368606E-12 -1.168985427227567E-11 1.082194189133034E-11 2.590603931803837E-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 16.9   n/a MPO413265  

305990 (2009 JR8)          Discovered 2009-May-13 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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