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99945 (4589 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2099945
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2599949591171434 4.8505e-08  
a 2.442861597926796 8.0178e-09 au
q 1.80772989664498 1.198e-07 au
i 10.3770910599803 5.5006e-06 deg
node 11.19118840197403 2.4661e-05 deg
peri 299.2459198142633 2.5932e-05 deg
M 4.391229938567109 8.1332e-06 deg
tp 2459379.488978305937
(2021-Jun-13.98897831)
3.1499e-05 TDB
period 1394.590557893025
3.82
6.8659e-06
1.88e-08
d
yr
n .2581402820795626 1.2709e-09 deg/d
Q 3.077993299208613 1.0102e-08 au
  Orbit Determination Parameters
   # obs. used (total)      947  
   data-arc span      22233 days (60.87 yr)  
   first obs. used      1960-09-24  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53668  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:12:23  

Additional Information
 Earth MOID = .82029 au 
 Jupiter MOID = 2.30444 au 
 T_jup = 3.432 
[ 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 15.15   n/a MPO637333  

99945 (4589 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20050622/Numbers.arcLast Updated: 2005-06-27

Alternate Designations
 4589 P-L = 2001 EZ6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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