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135001 (2001 HR21)
Classification: Main-belt Asteroid          SPK-ID: 2135001
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1390371193874383 4.0588e-08  
a 2.171781665478513 7.9328e-09 au
q 1.869823398771928 9.1199e-08 au
i 1.803462080238447 4.3252e-06 deg
node 63.05736601029453 0.00014897 deg
peri 192.41309324 0.00015014 deg
M 21.55636405858269 1.8574e-05 deg
tp 2459130.500380487020
(2020-Oct-08.00038049)
6.026e-05 TDB
period 1169.021962896352
3.20
6.4051e-06
1.754e-08
d
yr
n .3079497318494077 1.6873e-09 deg/d
Q 2.473739932185099 9.0357e-09 au
  Orbit Determination Parameters
   # obs. used (total)      428  
   data-arc span      9617 days (26.33 yr)  
   first obs. used      1994-01-16  
   last obs. used      2020-05-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58606  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:11:04  

Additional Information
 Earth MOID = .85339 au 
 Jupiter MOID = 2.56289 au 
 T_jup = 3.675 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457260.5 (2015-Aug-26.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1391373205687376 4.052e-08  
q 1.869231348498789 9.1087e-08 au
tp 2456792.690342585040
(2014-May-15.19034259)
5.9699e-05 TDB
node 63.06624795779797 0.00014895 deg
peri 192.35605202638 0.00015012 deg
i 1.803858727910451 4.3254e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      428  
   data-arc span      9617 days (26.33 yr)  
   first obs. used      1994-01-16  
   last obs. used      2020-05-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58606  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:11:04  

Additional Information
 Jupiter MOID = 2.56289 au 
 T_jup = 3.675 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.641881232691062E-15 -3.682165911027086E-15 -2.210692684300351E-13 -7.413464407101452E-15 -1.774728449893831E-14 -8.364077807983085E-16
q -3.682165911027086E-15 8.296916080467266E-15 4.508252841886667E-13 1.540902525850397E-14 2.892612734029687E-14 1.933535213024851E-15
tp -2.210692684300351E-13 4.508252841886667E-13 3.563998660720722E-9 5.118697031008035E-11 1.135111071240853E-9 5.206216693532552E-13
node -7.413464407101452E-15 1.540902525850397E-14 5.118697031008035E-11 2.218591859537607E-8 -2.215814486970967E-8 -1.716261432284461E-10
peri -1.774728449893831E-14 2.892612734029687E-14 1.135111071240853E-9 -2.215814486970967E-8 2.253679885929634E-8 1.717132648882109E-10
i -8.364077807983085E-16 1.933535213024851E-15 5.206216693532552E-13 -1.716261432284461E-10 1.717132648882109E-10 1.870930844732158E-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 17.26   n/a E2021B55  

135001 (2001 HR21)          Discovered 2001-Apr-23 by LINEAR at Socorro
Reference: 20060907/Numbers.arcLast Updated: 2006-09-10

Alternate Designations
 2001 HR21 = 2004 DX37 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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