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213509 (2002 GU91)
Classification: Main-belt Asteroid          SPK-ID: 2213509
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2036575801995089 4.3778e-08  
a 2.354521457771809 1.1359e-08 au
q 1.875005315154183 1.0827e-07 au
i 11.29724386927415 4.4534e-06 deg
node 40.68660241963483 2.0673e-05 deg
peri 294.3334129261449 2.3231e-05 deg
M 312.8217095870033 1.3436e-05 deg
tp 2459373.438665985150
(2021-Jun-07.93866599)
5.0025e-05 TDB
period 1319.630686268006
3.61
9.5499e-06
2.615e-08
d
yr
n .2728035985720379 1.9742e-09 deg/d
Q 2.834037600389436 1.3673e-08 au
  Orbit Determination Parameters
   # obs. used (total)      524  
   data-arc span      6638 days (18.17 yr)  
   first obs. used      2002-04-09  
   last obs. used      2020-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57792  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:42:58  

Additional Information
 Earth MOID = .897665 au 
 Jupiter MOID = 2.6363 au 
 T_jup = 3.502 
[ 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 15.91   n/a E2021B55  
diameter diameter 2.739 km 0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.113   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

213509 (2002 GU91)          Discovered 2002-Apr-09 by NEAT at Palomar
Reference: 20090509/Numbers.arcLast Updated: 2009-05-11

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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