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46778 (1998 HR51)
Classification: Main-belt Asteroid          SPK-ID: 2046778
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1216514497028499 3.2467e-08  
a 2.166104632871162 6.2712e-09 au
q 1.902594864074326 7.2011e-08 au
i 2.890960866775745 2.9246e-06 deg
node 82.10211938641588 6.8798e-05 deg
peri 167.6765903141522 7.0302e-05 deg
M 298.3897771492936 1.5892e-05 deg
tp 2459199.781898814796
(2020-Dec-16.28189881)
5.1754e-05 TDB
period 1164.441228319691
3.19
5.0569e-06
1.385e-08
d
yr
n .3091611592278352 1.3426e-09 deg/d
Q 2.429614401667998 7.0341e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1697  
   data-arc span      8116 days (22.22 yr)  
   first obs. used      1998-03-22  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47429  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:45:33  

Additional Information
 Earth MOID = .888564 au 
 Jupiter MOID = 2.58976 au 
 T_jup = 3.681 
[ 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 MPO502467  
diameter diameter 2.177 km 0.496 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.258   0.238 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46778 (1998 HR51)          Discovered 1998-Apr-30 by LONEOS at Anderson Mesa
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HR51 = 1999 TD17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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