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66251 (1999 GJ2)
Classification: Amor [NEO]          SPK-ID: 2066251
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 326 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1979632953123878 2.9078e-08  
a 1.535502415342266 2.2665e-09 au
q 1.23152929724098 4.4798e-08 au
i 11.27830454983694 3.7281e-06 deg
node 196.2047936980679 1.2487e-05 deg
peri 142.4578354405949 1.7762e-05 deg
M 20.09619690974504 1.4319e-05 deg
tp 2459161.704124278960
(2020-Nov-08.20412428)
2.7571e-05 TDB
period 694.9830021222367
1.90
1.5387e-06
4.213e-09
d
yr
n .5179982803905779 1.1469e-09 deg/d
Q 1.839475533443551 2.7151e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1645  
   data-arc span      13268 days (36.33 yr)  
   first obs. used      1984-10-12  
   last obs. used      2021-02-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48241  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-18 06:25:57  

Additional Information
 Earth MOID = .246924 au 
 Jupiter MOID = 3.56579 au 
 T_jup = 4.433 
[ 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 16.93   n/a E2021B10  
diameter diameter 1.222 km 0.233 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
rotation period rot_per 2.4621 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2005) http://www.asu.cas.cz/~ppravec/neo.htm]
[Polishook, D. (2012) Minor Planet Bull. 39, 187-192.]
geometric albedo albedo 0.187   0.094 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  

66251 (1999 GJ2)          Discovered 1999-Apr-07 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

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