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181881 (1999 PB9)
Classification: Main-belt Asteroid          SPK-ID: 2181881
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .237371981805707 5.6755e-08  
a 2.361316531102448 1.6182e-08 au
q 1.800806146444083 1.3955e-07 au
i 4.538376878878793 5.463e-06 deg
node 153.9529038729509 7.0295e-05 deg
peri 200.2981205810139 7.1389e-05 deg
M 300.2789074309646 1.7618e-05 deg
tp 2459420.364433805265
(2021-Jul-24.86443381)
6.6727e-05 TDB
period 1325.347423582374
3.63
1.3624e-05
3.73e-08
d
yr
n .2716268908773602 2.7922e-09 deg/d
Q 2.921826915760814 2.0024e-08 au
  Orbit Determination Parameters
   # obs. used (total)      229  
   data-arc span      7596 days (20.80 yr)  
   first obs. used      1999-08-08  
   last obs. used      2020-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .63217  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:26  

Additional Information
 Earth MOID = .794817 au 
 Jupiter MOID = 2.52012 au 
 T_jup = 3.508 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.14   n/a E2021B55  

181881 (1999 PB9)          Discovered 1999-Aug-08 by LONEOS at Anderson Mesa
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

Alternate Designations
 1999 PB9 = 2005 EU234 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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