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164207 (2004 GU9)
Classification: Apollo [NEO, PHA]          SPK-ID: 2164207
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 76 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .136029369990612 2.3134e-07  
a 1.001312876453123 5.8549e-09 au
q .865104916705717 2.2834e-07 au
i 13.65026887166258 1.4472e-05 deg
node 38.51850205170236 1.6027e-05 deg
peri 279.7902549735331 2.6376e-05 deg
M 126.0406108812387 3.6796e-05 deg
tp 2459072.366960880768
(2020-Aug-10.86696088)
3.7197e-05 TDB
period 365.9764401363265
1.00
3.2099e-06
8.788e-09
d
yr
n .9836698773994843 8.6275e-09 deg/d
Q 1.137520836200529 6.6513e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -5.026585078425553E-14 1.4E-14
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      246  
   data-arc span      7277 days (19.92 yr)  
   first obs. used      2001-05-11  
   last obs. used      2021-04-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47121  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:35:06  

Additional Information
 Earth MOID = .00176079 au 
 Jupiter MOID = 4.00909 au 
 T_jup = 6.041 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ 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 21.26   n/a E2021B69  
diameter diameter 0.163 km 0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
geometric albedo albedo 0.219   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  

164207 (2004 GU9)          Discovered 2004-Apr-13 by LINEAR at Socorro
Reference: 20070926/Numbers.arcLast Updated: 2007-09-30

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