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46775 (1998 HC42)
Classification: Main-belt Asteroid          SPK-ID: 2046775
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2058247040149679 3.4685e-08  
a 2.242454443294385 8.1299e-09 au
q 1.780901921236269 7.6343e-08 au
i 7.157872325952371 6.4212e-06 deg
node 67.04682546796347 3.3924e-05 deg
peri 263.9041857601559 3.7862e-05 deg
M 110.4319880090022 1.6035e-05 deg
tp 2458624.250215491769
(2019-May-20.75021549)
5.4221e-05 TDB
period 1226.546083838694
3.36
6.6702e-06
1.826e-08
d
yr
n .2935071129763963 1.5962e-09 deg/d
Q 2.704006965352502 9.8033e-09 au
  Orbit Determination Parameters
   # obs. used (total)      794  
   data-arc span      7950 days (21.77 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50005  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 08:34:48  

Additional Information
 Earth MOID = .787717 au 
 Jupiter MOID = 2.67683 au 
 T_jup = 3.595 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9   n/a MPO406313  
diameter diameter 2.286 km 0.315 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.148   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46775 (1998 HC42)          Discovered 1998-Apr-24 by Spacewatch at Kitt Peak
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HC42 = 1999 XH6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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