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308283 (2005 HG8)
Classification: Main-belt Asteroid          SPK-ID: 2308283
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3432824228107033 4.3937e-08  
a 2.751693200159525 3.9066e-08 au
q 1.807085291577026 1.3592e-07 au
i 19.6819524314606 7.6367e-06 deg
node 70.23218179011513 1.4274e-05 deg
peri 233.7350629923148 2.0056e-05 deg
M 50.69891936130205 9.9161e-06 deg
tp 2458765.701864147705
(2019-Oct-09.20186415)
4.6264e-05 TDB
period 1667.241234560611
4.56
3.5505e-05
9.721e-08
d
yr
n .2159255616628719 4.5982e-09 deg/d
Q 3.696301108742024 5.2476e-08 au
  Orbit Determination Parameters
   # obs. used (total)      388  
   data-arc span      5230 days (14.32 yr)  
   first obs. used      2005-04-06  
   last obs. used      2019-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47848  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 18:16:35  

Additional Information
 Earth MOID = .856596 au 
 Jupiter MOID = 1.78916 au 
 T_jup = 3.177 
[ 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 15.8   n/a MPO476377  
diameter diameter 4.173 km 0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.040   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

308283 (2005 HG8)          Discovered 2005-Apr-30 by LONEOS at Anderson Mesa
Reference: 20111210/Numbers.arcLast Updated: 2011-12-12

[ show close-approach data ]
Alternate Designations
 2005 HG8 = 2005 GR209 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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