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215771 (2004 GR18)
Classification: Main-belt Asteroid          SPK-ID: 2215771
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1608557591568641 7.6713e-08  
a 3.157144005867472 3.7615e-08 au
q 2.649299210036117 2.5302e-07 au
i 11.00193769217057 8.047e-06 deg
node 164.4456423584824 2.6987e-05 deg
peri 15.31711200790992 3.1994e-05 deg
M 335.6277525648549 1.665e-05 deg
tp 2459139.218087384073
(2020-Oct-16.71808738)
9.5713e-05 TDB
period 2048.990828242381
5.61
3.6618e-05
1.003e-07
d
yr
n .1756962476541718 3.1399e-09 deg/d
Q 3.664988801698827 4.3666e-08 au
  Orbit Determination Parameters
   # obs. used (total)      242  
   data-arc span      6673 days (18.27 yr)  
   first obs. used      2001-10-25  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52719  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 03:26:54  

Additional Information
 Earth MOID = 1.65517 au 
 Jupiter MOID = 1.30121 au 
 T_jup = 3.157 
[ 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 15.8   n/a MPO459961  
diameter diameter 4.603 km 0.274 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.036   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

215771 (2004 GR18)          Discovered 2004-Apr-14 by Spacewatch at Kitt Peak
Reference: 20090607/Numbers.arcLast Updated: 2009-06-08

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