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91313 (1999 GR7)
Classification: Main-belt Asteroid          SPK-ID: 2091313
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1334511443276983 3.9908e-08  
a 2.378558938578917 1.0516e-08 au
q 2.061137526374685 9.5284e-08 au
i 1.477139865588326 4.5742e-06 deg
node 159.5027258643745 0.00015297 deg
peri 54.38910636369963 0.00015402 deg
M 261.9952187887631 2.1053e-05 deg
tp 2459365.265760459215
(2021-May-30.76576046)
7.958e-05 TDB
period 1339.890484345689
3.67
8.8858e-06
2.433e-08
d
yr
n .2686786750155924 1.7818e-09 deg/d
Q 2.695980350783148 1.1919e-08 au
  Orbit Determination Parameters
   # obs. used (total)      886  
   data-arc span      7620 days (20.86 yr)  
   first obs. used      1999-03-19  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55209  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:27:35  

Additional Information
 Earth MOID = 1.05514 au 
 Jupiter MOID = 2.26852 au 
 T_jup = 3.527 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO502690  
diameter diameter 2.045 km 0.606 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.266   0.095 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91313 (1999 GR7)          Discovered 1999-Apr-07 by LONEOS at Anderson Mesa
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 GR7 = 1999 FP27 = 2000 QH95 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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