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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1466768794846499 4.6779e-08  
a 1.937448218543097 7.7728e-09 au
q 1.653269359684101 9.3476e-08 au
i 24.59835609371542 1.0044e-05 deg
node 35.40137327770967 9.8782e-06 deg
peri 56.44295405750059 3.9222e-05 deg
M 231.4464219947867 3.7741e-05 deg
tp 2459552.242828049383
(2021-Dec-03.74282805)
0.00010447 TDB
period 985.0166760247049
2.70
5.9276e-06
1.623e-08
d
yr
n .3654760460024647 2.1994e-09 deg/d
Q 2.221627077402092 8.9129e-09 au
  Orbit Determination Parameters
   # obs. used (total)      940  
   data-arc span      7646 days (20.93 yr)  
   first obs. used      1998-04-02  
   last obs. used      2019-03-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46341  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:20:06  

Additional Information
 Earth MOID = .730161 au 
 Jupiter MOID = 3.12662 au 
 T_jup = 3.783 
[ 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 15.55   n/a MPCxxxxx  
rotation period rot_per 2.66 h n/a LCDB (Rev. 2020-October); 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, 458-503.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

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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