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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1799336077524766 4.8567e-08  
a 2.33098228286567 1.1118e-08 au
q 1.911560231102546 1.1872e-07 au
i 3.410686798204636 3.4607e-06 deg
node 86.93958376318668 7.5747e-05 deg
peri 246.3457762170293 7.6353e-05 deg
M 277.6378385648338 1.0486e-05 deg
tp 2459297.893943861115
(2021-Mar-24.39394386)
3.8478e-05 TDB
period 1299.890847015694
3.56
9.3004e-06
2.546e-08
d
yr
n .2769463303988119 1.9815e-09 deg/d
Q 2.750404334628793 1.3119e-08 au
  Orbit Determination Parameters
   # obs. used (total)      742  
   data-arc span      9642 days (26.40 yr)  
   first obs. used      1994-01-16  
   last obs. used      2020-06-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5693  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 01:10:40  

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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