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441434 (2008 HE4)
Classification: Main-belt Asteroid          SPK-ID: 2441434
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1801902342877452 1.1138e-07  
a 3.088003804598521 5.0637e-08 au
q 2.531575675566465 3.1811e-07 au
i 17.7084861019103 7.7535e-06 deg
node 70.7122558738626 2.7296e-05 deg
peri 110.6355677695234 3.4623e-05 deg
M 99.24560319569557 2.0806e-05 deg
tp 2458454.083328012917
(2018-Dec-01.58332801)
0.00011131 TDB
period 1982.05256032825
5.43
4.8752e-05
1.335e-07
d
yr
n .1816298957987169 4.4675e-09 deg/d
Q 3.644431933630577 5.9761e-08 au
  Orbit Determination Parameters
   # obs. used (total)      147  
   data-arc span      6757 days (18.50 yr)  
   first obs. used      2002-02-08  
   last obs. used      2020-08-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55606  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 08:55:59  

Additional Information
 Earth MOID = 1.59361 au 
 Jupiter MOID = 1.60046 au 
 T_jup = 3.129 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457931.5 (2017-Jun-27.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1784476509610426 1.1157e-07  
q 2.534908557292711 3.1712e-07 au
tp 2458452.512971002018
(2018-Nov-30.01297100)
0.00011287 TDB
node 70.75070130641507 2.7242e-05 deg
peri 110.3428684671895 3.4762e-05 deg
i 17.73023145958779 7.7621e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      147  
   data-arc span      6757 days (18.50 yr)  
   first obs. used      2002-02-08  
   last obs. used      2020-08-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55606  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 08:55:59  

Additional Information
 Jupiter MOID = 1.60046 au 
 T_jup = 3.129 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.244786929780417E-14 -3.521497307684741E-14 2.239202823260533E-12 -5.083237185413372E-14 -1.713849062505944E-13 -1.730394792846621E-15
q -3.521497307684741E-14 1.005627302527283E-13 -5.890705702421201E-12 1.586628946702533E-13 4.853717495768489E-13 1.050478744012512E-14
tp 2.239202823260533E-12 -5.890705702421201E-12 1.274032198434296E-8 -4.379372495251274E-11 2.444204938142304E-9 -5.372341514002484E-12
node -5.083237185413372E-14 1.586628946702533E-13 -4.379372495251274E-11 7.421415125044192E-10 -7.124594930319468E-10 -2.34199997224714E-11
peri -1.713849062505944E-13 4.853717495768489E-13 2.444204938142304E-9 -7.124594930319468E-10 1.208430592877632E-9 2.145167498904884E-11
i -1.730394792846621E-15 1.050478744012512E-14 -5.372341514002484E-12 -2.34199997224714E-11 2.145167498904884E-11 6.025073583792234E-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 16.3   n/a MPO477081  

441434 (2008 HE4)          Discovered 2008-Mar-30 by CSS at Catalina
Reference: Last Updated: 2015-09-02

[ show close-approach data ]
Alternate Designations
 2008 HE4 = 2013 CX180 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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