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227808 (2007 BK21)
Classification: Main-belt Asteroid          SPK-ID: 2227808
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 .1325265092757918 4.9857e-08  
a 2.196228883834625 1.1988e-08 au
q 1.905170336289354 1.0651e-07 au
i 2.117179174571302 5.2775e-06 deg
node 32.37315962875715 0.00017253 deg
peri 60.25708621829743 0.00017435 deg
M 116.976751371445 2.5685e-05 deg
tp 2458814.211409787099
(2019-Nov-26.71140979)
8.3643e-05 TDB
period 1188.816502819987
3.25
9.7335e-06
2.665e-08
d
yr
n .3028221757908351 2.4794e-09 deg/d
Q 2.487287431379896 1.3576e-08 au
  Orbit Determination Parameters
   # obs. used (total)      202  
   data-arc span      7477 days (20.47 yr)  
   first obs. used      1999-10-04  
   last obs. used      2020-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54407  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 00:41:14  

Additional Information
 Earth MOID = .922619 au 
 Jupiter MOID = 2.66752 au 
 T_jup = 3.656 
[ 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 18.11   n/a E2021B55  

227808 (2007 BK21)          Discovered 2007-Jan-24 by LINEAR at Socorro
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

[ show close-approach data ]
Alternate Designations
 2007 BK21 = 1999 TX46 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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