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172717 (2004 BS81)
Classification: Main-belt Asteroid          SPK-ID: 2172717
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06213436079997556 4.228e-08  
a 2.742687914325848 1.8319e-08 au
q 2.572272753895393 1.1987e-07 au
i 7.204413371844689 3.9068e-06 deg
node 81.53292541006579 3.7594e-05 deg
peri 282.5607200713439 5.3209e-05 deg
M 328.5568557693069 3.5301e-05 deg
tp 2459145.406038314787
(2020-Oct-22.90603831)
0.00016237 TDB
period 1659.063527826248
4.54
1.6622e-05
4.551e-08
d
yr
n .2169898825222698 2.174e-09 deg/d
Q 2.913103074756303 1.9458e-08 au
  Orbit Determination Parameters
   # obs. used (total)      554  
   data-arc span      6620 days (18.12 yr)  
   first obs. used      2002-09-05  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56075  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 10:29:22  

Additional Information
 Earth MOID = 1.58239 au 
 Jupiter MOID = 2.38814 au 
 T_jup = 3.335 
[ 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 15.6   n/a MPO436858  

172717 (2004 BS81)          Discovered 2004-Jan-26 by LONEOS at Anderson Mesa
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

[ show close-approach data ]
Alternate Designations
 2004 BS81 = 2005 HK2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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