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56251 (1999 JR77)
Classification: Main-belt Asteroid          SPK-ID: 2056251
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1426511530184506 4.7322e-08  
a 2.583323386096813 1.2654e-08 au
q 2.214809326450575 1.2463e-07 au
i 10.26407412220516 4.7249e-06 deg
node 106.6668036830447 2.6053e-05 deg
peri 230.5915824286647 2.9825e-05 deg
M 299.6753262221399 1.6851e-05 deg
tp 2459254.631834431701
(2021-Feb-09.13183443)
7.1888e-05 TDB
period 1516.584420038576
4.15
1.1143e-05
3.051e-08
d
yr
n .2373755098913933 1.7442e-09 deg/d
Q 2.951837445743052 1.446e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1363  
   data-arc span      23632 days (64.70 yr)  
   first obs. used      1955-12-12  
   last obs. used      2020-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52585  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:00:11  

Additional Information
 Earth MOID = 1.21999 au 
 Jupiter MOID = 2.41542 au 
 T_jup = 3.387 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456596.5 (2013-Oct-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1401518622052632 4.6972e-08  
q 2.222323635189154 1.23e-07 au
tp 2456221.516248186058
(2012-Oct-21.01624819)
6.5797e-05 TDB
node 106.7054744095551 2.6024e-05 deg
peri 230.6078436836177 3e-05 deg
i 10.26652626627862 4.7233e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1363  
   data-arc span      23632 days (64.70 yr)  
   first obs. used      1955-12-12  
   last obs. used      2020-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52585  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:00:11  

Additional Information
 Jupiter MOID = 2.41542 au 
 T_jup = 3.387 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.206358291709809E-15 -5.75490295956215E-15 -4.616370808923378E-13 6.373783906327052E-15 -9.351201689665709E-14 8.506132394587456E-16
q -5.75490295956215E-15 1.512946138297899E-14 1.325749510033321E-12 -1.801773437569585E-14 2.776963911671986E-13 -2.138839296338705E-15
tp -4.616370808923378E-13 1.325749510033321E-12 4.329303984046983E-9 -9.057493554369867E-12 1.006572320960441E-9 2.570060691726842E-12
node 6.373783906327052E-15 -1.801773437569585E-14 -9.057493554369867E-12 6.772463273919364E-10 -6.680724204620013E-10 2.955443582276917E-11
peri -9.351201689665709E-14 2.776963911671986E-13 1.006572320960441E-9 -6.680724204620013E-10 9.000244132351638E-10 -2.851824140682128E-11
i 8.506132394587456E-16 -2.138839296338705E-15 2.570060691726842E-12 2.955443582276917E-11 -2.851824140682128E-11 2.230966380242979E-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 13.8   n/a MPO319745  
diameter diameter 4.527 km 0.181 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.285   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

56251 (1999 JR77)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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