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JPL Small-Body Database Browser
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390929 (2005 GP21)
Classification: Apollo [NEO, PHA]          SPK-ID: 2390929
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2244279376240022 1.3872e-06  
a 1.30832539714804 1.0316e-08 au
q 1.014700626525002 1.821e-06 au
i 18.80236522898295 8.1962e-05 deg
node 10.0070697498323 1.3733e-05 deg
peri 1.40008295611926 0.00049806 deg
M 318.4214920742045 0.00076109 deg
tp 2458663.630391759927
(2019-Jun-29.13039176)
0.0011556 TDB
period 546.6030929761666
1.50
6.4651e-06
1.77e-08
d
yr
n .6586131776896055 7.7899e-09 deg/d
Q 1.601950167771078 1.2632e-08 au
  Orbit Determination Parameters
   # obs. used (total)      235  
   data-arc span      4375 days (11.98 yr)  
   first obs. used      2005-04-04  
   last obs. used      2017-03-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .45561  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 09:22:01  

Additional Information
 Earth MOID = .0139992 au 
 Jupiter MOID = 3.85753 au 
 T_jup = 4.902 
[ 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 20.5   n/a MPO294766  

390929 (2005 GP21)          Discovered 2005-Apr-04 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2014-04-17

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