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465402 (2008 HW1)
Classification: Apollo [NEO]          SPK-ID: 2465402
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9600069559540535 1.5281e-08  
a 2.587061729390048 2.0116e-08 au
q .1034644736930787 3.9413e-08 au
i 10.48524182390196 6.4064e-06 deg
node 127.7114237885126 7.1593e-05 deg
peri 250.4740598431995 6.9726e-05 deg
M 3.739549011784161 1.1056e-05 deg
tp 2459184.712064520534
(2020-Dec-01.21206452)
4.6497e-05 TDB
period 1519.877598795233
4.16
1.7727e-05
4.853e-08
d
yr
n .2368611790089956 2.7626e-09 deg/d
Q 5.070658985087018 3.9428e-08 au
  Orbit Determination Parameters
   # obs. used (total)      377  
   data-arc span      4766 days (13.05 yr)  
   first obs. used      2008-03-30  
   last obs. used      2021-04-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53782  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-17 06:23:52  

Additional Information
 Earth MOID = .106717 au 
 Jupiter MOID = .879116 au 
 T_jup = 2.400 
[ show covariance matrix ]

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 17.35   n/a MPCxxxxx  

465402 (2008 HW1)          Discovered 2008-Mar-30 by CSS at Catalina
Reference: Last Updated: 2016-04-25

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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