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JPL Small-Body Database Browser
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164716 (1998 GH)
Classification: Mars-crossing Asteroid          SPK-ID: 2164716
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1468470270133941 4.752e-08  
a 1.937251376664817 7.8653e-09 au
q 1.652771771423983 9.4804e-08 au
i 24.60216873215962 1.0044e-05 deg
node 35.42748378600919 1.0136e-05 deg
peri 56.37387522179095 3.9191e-05 deg
M 158.4097781426306 3.7431e-05 deg
tp 2458567.131960729344
(2019-Mar-24.63196073)
0.00010094 TDB
period 984.8665654778205
2.70
5.9979e-06
1.642e-08
d
yr
n .3655317508167631 2.2261e-09 deg/d
Q 2.22173098190565 9.0203e-09 au
  Orbit Determination Parameters
   # obs. used (total)      933  
   data-arc span      7646 days (20.93 yr)  
   first obs. used      1998-04-02  
   last obs. used      2019-03-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46463  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 14:27:02  

Additional Information
 Earth MOID = .73028 au 
 Jupiter MOID = 3.12823 au 
 T_jup = 3.783 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457043.5 (2015-Jan-21.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1468512077193785 4.7401e-08  
q 1.65263331985531 9.4528e-08 au
tp 2456597.623487469318
(2013-Nov-01.12348747)
9.5124e-05 TDB
node 35.44579751815823 1.0137e-05 deg
peri 56.36813985827867 3.9205e-05 deg
i 24.6031343556301 1.0044e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      933  
   data-arc span      7646 days (20.93 yr)  
   first obs. used      1998-04-02  
   last obs. used      2019-03-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46463  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 14:27:02  

Additional Information
 Jupiter MOID = 3.12823 au 
 T_jup = 3.783 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.246891357900629E-15 -4.47103521994881E-15 -2.961408389979583E-12 2.989658477445331E-14 -1.182844804673272E-12 -3.662479239938112E-14
q -4.47103521994881E-15 8.935510238891032E-15 6.020064705899178E-12 -6.164111953996702E-14 2.409556299405044E-12 7.554609446595492E-14
tp -2.961408389979583E-12 6.020064705899178E-12 9.048548109152969E-9 -7.075242024320183E-11 3.611025896926554E-9 8.27380517173334E-11
node 2.989658477445331E-14 -6.164111953996702E-14 -7.075242024320183E-11 1.027573565189543E-10 -1.196043105316543E-10 -3.711031138167816E-11
peri -1.182844804673272E-12 2.409556299405044E-12 3.611025896926554E-9 -1.196043105316543E-10 1.536998121288842E-9 6.578073149865372E-11
i -3.662479239938112E-14 7.554609446595492E-14 8.27380517173334E-11 -3.711031138167816E-11 6.578073149865372E-11 1.008836123727382E-10

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5   n/a MPO454105  
rotation period rot_per 2.66 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46-4, in press.]

164716 (1998 GH)          Discovered 1998-Apr-02 by LINEAR at Socorro
Reference: 20071026/Numbers.arcLast Updated: 2007-10-28

Alternate Designations
 1998 GH = 2002 RH65 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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