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JPL Small-Body Database Browser
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312571 (2009 HR41)
Classification: Main-belt Asteroid          SPK-ID: 2312571
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04185708743725475 4.2131e-08  
a 2.542845560276836 2.3761e-08 au
q 2.436409451320893 1.2106e-07 au
i 4.970162865296987 4.0255e-06 deg
node 148.119380532103 5.8465e-05 deg
peri 3.684539760404084 8.4956e-05 deg
M 323.5554504039273 6.3363e-05 deg
tp 2459150.436886939798
(2020-Oct-27.93688694)
0.00026117 TDB
period 1481.07960988888
4.05
2.076e-05
5.684e-08
d
yr
n .2430659348736894 3.4069e-09 deg/d
Q 2.649281669232779 2.4756e-08 au
  Orbit Determination Parameters
   # obs. used (total)      230  
   data-arc span      5407 days (14.80 yr)  
   first obs. used      2005-04-02  
   last obs. used      2020-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61054  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 18:46:57  

Additional Information
 Earth MOID = 1.44671 au 
 Jupiter MOID = 2.32595 au 
 T_jup = 3.438 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457605.5 (2016-Aug-05.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04148427452474673 4.2358e-08  
q 2.436926092942592 1.2149e-07 au
tp 2457676.390318126129
(2016-Oct-14.89031813)
0.00025843 TDB
node 148.1672676802665 5.842e-05 deg
peri 5.354957006496596 8.5153e-05 deg
i 4.971786397955263 4.0277e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      230  
   data-arc span      5407 days (14.80 yr)  
   first obs. used      2005-04-02  
   last obs. used      2020-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61054  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 18:46:57  

Additional Information
 Jupiter MOID = 2.32595 au 
 T_jup = 3.438 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.794223467278762E-15 -5.0821398391424E-15 3.577530995631654E-13 2.230270185116921E-14 8.317767070307671E-14 -2.02555633887026E-15
q -5.0821398391424E-15 1.475933172716462E-14 4.22785324962186E-14 -6.009488007717432E-14 1.272055370212328E-14 6.459714111026216E-15
tp 3.577530995631654E-13 4.22785324962186E-14 6.678572986693234E-8 2.103130995600494E-10 1.604512365871198E-8 1.218948745467107E-11
node 2.230270185116921E-14 -6.009488007717432E-14 2.103130995600494E-10 3.41293875942547E-9 -3.348512552786354E-9 2.024226878834881E-11
peri 8.317767070307671E-14 1.272055370212328E-14 1.604512365871198E-8 -3.348512552786354E-9 7.250992297120026E-9 -1.723082907819917E-11
i -2.02555633887026E-15 6.459714111026216E-15 1.218948745467107E-11 2.024226878834881E-11 -1.723082907819917E-11 1.622262942309413E-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 16.8   n/a MPO455304  
diameter diameter 2.468 km 0.667 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.042   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

312571 (2009 HR41)          Discovered 2009-Apr-20 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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