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99620 (2002 GP85)
Classification: Main-belt Asteroid          SPK-ID: 2099620
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1799336014964045 4.794e-08  
a 2.330982282768125 1.1118e-08 au
q 1.911560245605346 1.1734e-07 au
i 3.410686905468405 3.453e-06 deg
node 86.93959360750986 7.3264e-05 deg
peri 246.3457664348913 7.3909e-05 deg
M 277.6378387493641 1.0482e-05 deg
tp 2459297.893943176144
(2021-Mar-24.39394318)
3.8463e-05 TDB
period 1299.890846934099
3.56
9.2998e-06
2.546e-08
d
yr
n .276946330416196 1.9814e-09 deg/d
Q 2.750404319930905 1.3118e-08 au
  Orbit Determination Parameters
   # obs. used (total)      758  
   data-arc span      9710 days (26.58 yr)  
   first obs. used      1994-01-16  
   last obs. used      2020-08-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56539  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:10:09  

Additional Information
 Earth MOID = .904332 au 
 Jupiter MOID = 2.60983 au 
 T_jup = 3.547 
[ 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 MPO474872  
diameter diameter 1.999 km 0.226 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.90106 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.335   0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

99620 (2002 GP85)          Discovered 2002-Apr-10 by LINEAR at Socorro
Reference: 20050224/Numbers.arcLast Updated: 2005-02-28
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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