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JPL Small-Body Database Browser
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48882 (1998 HJ139)
Classification: Main-belt Asteroid          SPK-ID: 2048882
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1521437099817192 4.8219e-08  
a 2.230812861763128 1.0669e-08 au
q 1.891408716699549 1.0796e-07 au
i 6.792778520699938 4.5875e-06 deg
node 125.5372717111973 6.2105e-05 deg
peri 147.0004332650251 6.7037e-05 deg
M 176.6597578880663 2.74e-05 deg
tp 2458403.288356082527
(2018-Oct-11.78835608)
9.204e-05 TDB
period 1217.007168924768
3.33
8.7308e-06
2.39e-08
d
yr
n .2958076247965424 2.1221e-09 deg/d
Q 2.570217006826706 1.2292e-08 au
  Orbit Determination Parameters
   # obs. used (total)      427  
   data-arc span      10507 days (28.77 yr)  
   first obs. used      1991-02-14  
   last obs. used      2019-11-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58085  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:15:36  

Additional Information
 Earth MOID = .87919 au 
 Jupiter MOID = 2.54229 au 
 T_jup = 3.618 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457183.5 (2015-Jun-10.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1521600672847127 4.8059e-08  
q 1.891145066620791 1.0755e-07 au
tp 2457187.047813341213
(2015-Jun-13.54781334)
9.169e-05 TDB
node 125.5732912892336 6.212e-05 deg
peri 147.0997469349676 6.708e-05 deg
i 6.792169297063517 4.5874e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      427  
   data-arc span      10507 days (28.77 yr)  
   first obs. used      1991-02-14  
   last obs. used      2019-11-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58085  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:15:36  

Additional Information
 Jupiter MOID = 2.54229 au 
 T_jup = 3.618 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.309683502446928E-15 -5.150572091585453E-15 -2.095607194884649E-12 1.772358048137995E-14 -5.949512632416005E-13 -1.926044070136799E-16
q -5.150572091585453E-15 1.156768538354189E-14 4.682393831118389E-12 -4.070529995575615E-14 1.330264776550413E-12 6.201644993584097E-16
tp -2.095607194884649E-12 4.682393831118389E-12 8.407010904590218E-9 -1.927963488900364E-11 2.388683819316782E-9 6.330822025320075E-12
node 1.772358048137995E-14 -4.070529995575615E-14 -1.927963488900364E-11 3.858929068475156E-9 -3.837426230694728E-9 2.819260021164398E-11
peri -5.949512632416005E-13 1.330264776550413E-12 2.388683819316782E-9 -3.837426230694728E-9 4.499674253883693E-9 -2.622404578720914E-11
i -1.926044070136799E-16 6.201644993584097E-16 6.330822025320075E-12 2.819260021164398E-11 -2.622404578720914E-11 2.10440062892637E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2   n/a MPO436125  
rotation period rot_per 6.96 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

48882 (1998 HJ139)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HJ139 = 2001 DN25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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