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JPL Small-Body Database Browser
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48878 (1998 HQ118)
Classification: Main-belt Asteroid          SPK-ID: 2048878
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1472896595860783 3.5027e-08  
a 3.04879995554914 1.7985e-08 au
q 2.599743247950256 1.0705e-07 au
i 16.06770453063004 4.2294e-06 deg
node 132.32813255798 1.6224e-05 deg
peri 343.8357948176697 2.3391e-05 deg
M 138.0260188197368 1.6027e-05 deg
tp 2458254.995478573792
(2018-May-16.49547857)
8.553e-05 TDB
period 1944.427797080372
5.32
1.7205e-05
4.71e-08
d
yr
n .1851444422572815 1.6382e-09 deg/d
Q 3.497856663148023 2.0634e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1390  
   data-arc span      9462 days (25.91 yr)  
   first obs. used      1993-06-15  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47428  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:39:27  

Additional Information
 Earth MOID = 1.61917 au 
 Jupiter MOID = 1.59746 au 
 T_jup = 3.162 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456748.5 (2014-Apr-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1492367393640646 3.5098e-08  
q 2.590169161543502 1.0775e-07 au
tp 2456311.014465313228
(2013-Jan-18.51446531)
8.4058e-05 TDB
node 132.3869222104498 1.6243e-05 deg
peri 343.1213881535696 2.3169e-05 deg
i 16.0652749201559 4.2292e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1390  
   data-arc span      9462 days (25.91 yr)  
   first obs. used      1993-06-15  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47428  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:39:27  

Additional Information
 Jupiter MOID = 1.59746 au 
 T_jup = 3.162 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.231847141917721E-15 -3.741409603237451E-15 -1.137039266400213E-13 -5.972997785946577E-15 -2.013207310293597E-14 -2.146851721294738E-15
q -3.741409603237451E-15 1.161028957725385E-14 2.015333758047369E-13 2.157900300183482E-14 4.380323119341287E-14 7.013284121250695E-15
tp -1.137039266400213E-13 2.015333758047369E-13 7.06574941887816E-9 1.280744168724459E-11 1.415978960909482E-9 -4.201566804235002E-12
node -5.972997785946577E-15 2.157900300183482E-14 1.280744168724459E-11 2.63841684277146E-10 -2.502564842253517E-10 5.053455406787808E-12
peri -2.013207310293597E-14 4.380323119341287E-14 1.415978960909482E-9 -2.502564842253517E-10 5.367809632595874E-10 -5.727577872851371E-12
i -2.146851721294738E-15 7.013284121250695E-15 -4.201566804235002E-12 5.053455406787808E-12 -5.727577872851371E-12 1.788603885851259E-11

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 13.3   n/a MPO474367  

48878 (1998 HQ118)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HQ118 = 2000 QC191 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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