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46772 (1998 HD8)
Classification: Main-belt Asteroid          SPK-ID: 2046772
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0589980572313703 4.2283e-08  
a 2.203822193347774 7.7568e-09 au
q 2.073800965456877 9.5934e-08 au
i 4.292936085564163 4.4757e-06 deg
node 161.9256499675279 5.1346e-05 deg
peri 38.368957614484 6.5233e-05 deg
M 289.2208276905994 4.29e-05 deg
tp 2459235.445014721582
(2021-Jan-20.94501472)
0.000143 TDB
period 1194.987205134864
3.27
6.309e-06
1.727e-08
d
yr
n .3012584556998425 1.5905e-09 deg/d
Q 2.333843421238669 8.2144e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1182  
   data-arc span      7956 days (21.78 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53249  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 08:34:33  

Additional Information
 Earth MOID = 1.07324 au 
 Jupiter MOID = 2.62238 au 
 T_jup = 3.657 
[ 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 15.3   n/a MPO452809  
diameter diameter 2.239 km 0.295 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.293   0.131 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46772 (1998 HD8)          Discovered 1998-Apr-21 by Antonini, P. at Bedoin
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

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