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JPL Small-Body Database Browser
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39478 (1980 FR4)
Classification: Main-belt Asteroid          SPK-ID: 2039478
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08041971500324904 5.7489e-08  
a 2.366382813323952 1.3967e-08 au
q 2.176078981887853 1.3687e-07 au
i 6.641447331554524 6.8564e-06 deg
node 177.3361916975316 3.8526e-05 deg
peri 55.77456935015753 5.4104e-05 deg
M 219.0828160462745 4.2036e-05 deg
tp 2459120.960033766789
(2020-Sep-28.46003377)
0.00015777 TDB
period 1329.615075316657
3.64
1.1772e-05
3.223e-08
d
yr
n .2707550528593876 2.3971e-09 deg/d
Q 2.55668664476005 1.509e-08 au
  Orbit Determination Parameters
   # obs. used (total)      670  
   data-arc span      14174 days (38.81 yr)  
   first obs. used      1980-03-16  
   last obs. used      2019-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57065  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:06:54  

Additional Information
 Earth MOID = 1.17396 au 
 Jupiter MOID = 2.4307 au 
 T_jup = 3.534 
[ 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 15.7   n/a MPO309459  

39478 (1980 FR4)          Discovered 1980-Mar-16 by Lagerkvist, C.-I. at La Silla
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1980 FR4 = 2000 WK38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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