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66581 (1999 RF155)
Classification: Main-belt Asteroid          SPK-ID: 2066581
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06742726347292581 3.422e-08  
a 2.513157062412736 1.2476e-08 au
q 2.343701759016588 8.9366e-08 au
i 4.08804936941385 3.9525e-06 deg
node 234.9880970464791 6.2673e-05 deg
peri 199.3767978590967 7.2349e-05 deg
M 350.2964245865865 3.6775e-05 deg
tp 2459039.724476692810
(2020-Jul-09.22447669)
0.00014864 TDB
period 1455.217382027245
3.98
1.0836e-05
2.967e-08
d
yr
n .2473857201310284 1.8421e-09 deg/d
Q 2.682612365808884 1.3317e-08 au
  Orbit Determination Parameters
   # obs. used (total)      815  
   data-arc span      7395 days (20.25 yr)  
   first obs. used      1999-09-07  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53728  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 07:05:10  

Additional Information
 Earth MOID = 1.3589 au 
 Jupiter MOID = 2.48969 au 
 T_jup = 3.454 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457049.5 (2015-Jan-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0666295756463865 3.4074e-08  
q 2.346143108287761 8.8879e-08 au
tp 2457579.092843153361
(2016-Jul-09.59284315)
0.00015202 TDB
node 235.0283482295049 6.2749e-05 deg
peri 198.1137143362399 7.2713e-05 deg
i 4.084143532019884 3.9526e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      815  
   data-arc span      7395 days (20.25 yr)  
   first obs. used      1999-09-07  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53728  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 07:05:10  

Additional Information
 Jupiter MOID = 2.48969 au 
 T_jup = 3.454 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.161045091087595E-15 -3.00357051491847E-15 -4.004537667377519E-13 -1.995359119247924E-15 -5.47565582958031E-14 -8.520510388571385E-16
q -3.00357051491847E-15 7.89942355065078E-15 8.084609826756601E-13 3.86246602020516E-15 7.464356461532952E-14 2.291058168136981E-15
tp -4.004537667377519E-13 8.084609826756601E-13 2.311068276863539E-8 1.039052774821331E-10 5.603837142846786E-9 3.43458145985826E-12
node -1.995359119247924E-15 3.86246602020516E-15 1.039052774821331E-10 3.937451911767836E-9 -3.901799705504827E-9 -6.02017075064856E-11
peri -5.47565582958031E-14 7.464356461532952E-14 5.603837142846786E-9 -3.901799705504827E-9 5.287140749791199E-9 6.084498778684288E-11
i -8.520510388571385E-16 2.291058168136981E-15 3.43458145985826E-12 -6.02017075064856E-11 6.084498778684288E-11 1.562290838524264E-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 15.6   n/a MPO502575  

66581 (1999 RF155)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RF155 = 2002 JR57 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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