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181295 (2006 PH21)
Classification: Main-belt Asteroid          SPK-ID: 2181295
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1575144174953656 3.8232e-08  
a 2.304299753790761 1.0577e-08 au
q 1.941339320337695 9.1143e-08 au
i 5.015875298091077 5.3689e-06 deg
node 125.5598615758813 4.0889e-05 deg
peri 257.0737633200293 4.4382e-05 deg
M 349.9790581035622 1.6133e-05 deg
tp 2459236.064190693798
(2021-Jan-21.56419069)
5.7276e-05 TDB
period 1277.635254458311
3.50
8.7966e-06
2.408e-08
d
yr
n .2817705591198891 1.94e-09 deg/d
Q 2.667260187243827 1.2243e-08 au
  Orbit Determination Parameters
   # obs. used (total)      410  
   data-arc span      7760 days (21.25 yr)  
   first obs. used      1999-09-11  
   last obs. used      2020-12-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52162  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:30:02  

Additional Information
 Earth MOID = .950294 au 
 Jupiter MOID = 2.79827 au 
 T_jup = 3.567 
[ 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 16.98   n/a E2021B55  

181295 (2006 PH21)          Discovered 2006-Aug-15 by NEAT at Palomar
Reference: 20080321/Numbers.arcLast Updated: 2008-03-26

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