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JPL Small-Body Database Browser
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91349 (1999 JR51)
Classification: Main-belt Asteroid          SPK-ID: 2091349
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1743007699158177 3.4648e-08  
a 2.363448619091487 9.0784e-09 au
q 1.951497705127365 8.1539e-08 au
i 1.784690385992872 3.6799e-06 deg
node 207.6626475004064 0.00012597 deg
peri 331.2456802565767 0.00012642 deg
M 326.4274826432138 1.0802e-05 deg
tp 2459124.265351908857
(2020-Oct-01.76535191)
4.0068e-05 TDB
period 1327.14285955033
3.63
7.6467e-06
2.094e-08
d
yr
n .2712594182377451 1.5629e-09 deg/d
Q 2.775399533055609 1.0661e-08 au
  Orbit Determination Parameters
   # obs. used (total)      749  
   data-arc span      9081 days (24.86 yr)  
   first obs. used      1995-02-24  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54361  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 14:02:23  

Additional Information
 Earth MOID = .955247 au 
 Jupiter MOID = 2.18803 au 
 T_jup = 3.528 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456736.5 (2014-Mar-20.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1743046635206832 3.468e-08  
q 1.951562949738925 8.1622e-08 au
tp 2456470.547273740416
(2013-Jun-27.04727374)
3.755e-05 TDB
node 207.6904410399821 0.00012606 deg
peri 331.3275600089943 0.00012651 deg
i 1.783516686448512 3.6799e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      749  
   data-arc span      9081 days (24.86 yr)  
   first obs. used      1995-02-24  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54361  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 14:02:23  

Additional Information
 Jupiter MOID = 2.18803 au 
 T_jup = 3.528 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.202688482726989E-15 -2.818811668217113E-15 -9.353751855402559E-14 -1.427454307390492E-14 -2.916552725863729E-14 3.054753206462315E-16
q -2.818811668217113E-15 6.662069916073246E-15 2.111451562123483E-13 3.167454515664754E-14 7.077098281259649E-14 -6.701633387372205E-16
tp -9.353751855402559E-14 2.111451562123483E-13 1.409990685971107E-9 -9.617142873950832E-12 4.133665490820282E-10 -3.05782764949042E-13
node -1.427454307390492E-14 3.167454515664754E-14 -9.617142873950832E-12 1.589118932535443E-8 -1.588569161546824E-8 -5.469855449800125E-11
peri -2.916552725863729E-14 7.077098281259649E-14 4.133665490820282E-10 -1.588569161546824E-8 1.600364427140122E-8 5.458019731481481E-11
i 3.054753206462315E-16 -6.701633387372205E-16 -3.05782764949042E-13 -5.469855449800125E-11 5.458019731481481E-11 1.354143781791448E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.0   n/a MPO412706  

91349 (1999 JR51)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1999 JR51 = 1995 DF3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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