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216724 (2005 GD21)
Classification: Main-belt Asteroid          SPK-ID: 2216724
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2010714979447125 3.7174e-08  
a 2.416287814793582 1.268e-08 au
q 1.930441204407481 9.4493e-08 au
i 5.735942464269344 6.5672e-06 deg
node 210.7480775073859 4.7595e-05 deg
peri 61.57133617090914 5.2439e-05 deg
M 12.24501370049095 2e-05 deg
tp 2459153.836404676278
(2020-Oct-31.33640468)
7.6137e-05 TDB
period 1371.89673506582
3.76
1.0799e-05
2.957e-08
d
yr
n .2624104211332847 2.0657e-09 deg/d
Q 2.902134425179684 1.523e-08 au
  Orbit Determination Parameters
   # obs. used (total)      191  
   data-arc span      6412 days (17.56 yr)  
   first obs. used      2002-10-30  
   last obs. used      2020-05-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5282  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:02  

Additional Information
 Earth MOID = .920617 au 
 Jupiter MOID = 2.21739 au 
 T_jup = 3.482 
[ 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 17.55   n/a E2021B55  

216724 (2005 GD21)          Discovered 2005-Apr-03 by NEAT at Palomar
Reference: 20090707/Numbers.arcLast Updated: 2009-07-09

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