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JPL Small-Body Database Browser
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58823 (1998 HR8)
Classification: Main-belt Asteroid          SPK-ID: 2058823
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2194308824844949 3.4901e-08  
a 2.600475917441736 1.1993e-08 au
q 2.02985119199782 9.356e-08 au
i 4.79215312947737 4.6493e-06 deg
node 150.6226364876703 7.874e-05 deg
peri 328.782431830607 8.0813e-05 deg
M 66.7148238192338 1.915e-05 deg
tp 2458316.644362530411
(2018-Jul-17.14436253)
8.0262e-05 TDB
period 1531.713997565733
4.19
1.0596e-05
2.901e-08
d
yr
n .2350308220543312 1.6258e-09 deg/d
Q 3.171100642885653 1.4624e-08 au
  Orbit Determination Parameters
   # obs. used (total)      496  
   data-arc span      13949 days (38.19 yr)  
   first obs. used      1981-03-02  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66742  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:13:48  

Additional Information
 Earth MOID = 1.04788 au 
 Jupiter MOID = 1.92999 au 
 T_jup = 3.376 
[ 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 16.2   n/a MPO436193  
diameter diameter 1.466 km 0.158 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.248   0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

58823 (1998 HR8)          Discovered 1998-Apr-17 by Spacewatch at Kitt Peak
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HR8 = 1981 EC47 = 2000 SY325 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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