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49694 (1999 US41)
Classification: Main-belt Asteroid          SPK-ID: 2049694
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2131470454383974 4.0915e-08  
a 2.271615207501185 1.0162e-08 au
q 1.787427137649376 9.4414e-08 au
i 21.52107837591396 5.5475e-06 deg
node 205.5852768206466 1.1329e-05 deg
peri 145.293485053029 1.7181e-05 deg
M 43.74978358529744 1.1492e-05 deg
tp 2458848.524358123877
(2019-Dec-31.02435812)
3.979e-05 TDB
period 1250.548610571657
3.42
8.3916e-06
2.297e-08
d
yr
n .2878736555753997 1.9317e-09 deg/d
Q 2.755803277352995 1.2328e-08 au
  Orbit Determination Parameters
   # obs. used (total)      851  
   data-arc span      7930 days (21.71 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52074  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 07:46:00  

Additional Information
 Earth MOID = .814521 au 
 Jupiter MOID = 2.78713 au 
 T_jup = 3.492 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456954.5 (2014-Oct-24.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2136885764612525 4.105e-08  
q 1.786085410786973 9.4865e-08 au
tp 2456348.321353351362
(2013-Feb-24.82135335)
4.1389e-05 TDB
node 205.6157210754145 1.1323e-05 deg
peri 145.4063449454408 1.7142e-05 deg
i 21.52854937208544 5.5495e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      851  
   data-arc span      7930 days (21.71 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52074  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 07:46:00  

Additional Information
 Jupiter MOID = 2.78713 au 
 T_jup = 3.492 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.685100533712871E-15 -3.880502743467895E-15 6.80866699187817E-13 -9.617089942534436E-15 2.362262969978462E-13 3.686711234173508E-15
q -3.880502743467895E-15 8.999393343448767E-15 -1.652353013316125E-12 2.209498021393486E-14 -5.599893480848056E-13 -7.323294011363217E-15
tp 6.80866699187817E-13 -1.652353013316125E-12 1.713028968860517E-9 -1.440236324846947E-11 5.421851418965032E-10 9.341950541839576E-12
node -9.617089942534436E-15 2.209498021393486E-14 -1.440236324846947E-11 1.282016626386039E-10 -1.229424371654591E-10 1.038601585637686E-11
peri 2.362262969978462E-13 -5.599893480848056E-13 5.421851418965032E-10 -1.229424371654591E-10 2.9385574839336E-10 -6.460367634851902E-12
i 3.686711234173508E-15 -7.323294011363217E-15 9.341950541839576E-12 1.038601585637686E-11 -6.460367634851902E-12 3.079749350076433E-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 15.2   n/a MPO432054  

49694 (1999 US41)          Discovered 1999-Oct-18 by LONEOS at Anderson Mesa
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 US41 = 1998 HU74 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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