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85120 (1975 SP1)
Classification: Main-belt Asteroid          SPK-ID: 2085120
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2019569131038009 6.8334e-08  
a 2.583306494442275 1.6446e-08 au
q 2.061589889223712 1.855e-07 au
i 9.272768531119377 5.9649e-06 deg
node 196.167572440825 3.3774e-05 deg
peri 141.8172510649986 3.7653e-05 deg
M 295.396114845009 1.9778e-05 deg
tp 2459272.656346476207
(2021-Feb-27.15634648)
8.5091e-05 TDB
period 1516.56954525846
4.15
1.4482e-05
3.965e-08
d
yr
n .2373778381120315 2.2668e-09 deg/d
Q 3.105023099660838 1.9767e-08 au
  Orbit Determination Parameters
   # obs. used (total)      412  
   data-arc span      16326 days (44.70 yr)  
   first obs. used      1975-09-30  
   last obs. used      2020-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52866  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:15:53  

Additional Information
 Earth MOID = 1.06245 au 
 Jupiter MOID = 2.35465 au 
 T_jup = 3.376 
[ 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 MPO436371  

85120 (1975 SP1)          Discovered 1975-Sep-30 by Bus, S. J. at Palomar
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1975 SP1 = 1995 NC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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