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JPL Small-Body Database Browser
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305290 (2008 AT4)
Classification: Main-belt Asteroid          SPK-ID: 2305290
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2596958138078558 5.4856e-08  
a 2.621008018623262 3.0598e-08 au
q 1.940343208229978 1.5665e-07 au
i 6.870437482905405 9.5947e-06 deg
node 51.82826673796083 6.0046e-05 deg
peri 47.50455355481919 6.7709e-05 deg
M 247.2692884210703 3.3405e-05 deg
tp 2459085.833979966495
(2020-Aug-24.33397997)
0.00015093 TDB
period 1549.890268062453
4.24
2.7141e-05
7.431e-08
d
yr
n .2322745083431248 4.0674e-09 deg/d
Q 3.301672829016546 3.8544e-08 au
  Orbit Determination Parameters
   # obs. used (total)      147  
   data-arc span      7675 days (21.01 yr)  
   first obs. used      1998-09-19  
   last obs. used      2019-09-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56059  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 07:39:45  

Additional Information
 Earth MOID = .964775 au 
 Jupiter MOID = 1.92348 au 
 T_jup = 3.346 
[ 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 17.4   n/a MPO352868  

305290 (2008 AT4)          Discovered 2008-Jan-05 by PMO NEO Survey Program at Purple Mountain
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

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