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38237 Roche (1999 OF)
Classification: Main-belt Asteroid          SPK-ID: 2038237
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1624011621196569 3.6358e-08  
a 2.378665834655712 8.9073e-09 au
q 1.992367738813301 8.6887e-08 au
i 1.498514413335121 3.8481e-06 deg
node 290.8231546626041 0.00016367 deg
peri 295.6273099224801 0.00016414 deg
M 309.9213032248167 1.3716e-05 deg
tp 2459186.901368586665
(2020-Dec-03.40136859)
5.1441e-05 TDB
period 1339.980810452188
3.67
7.5267e-06
2.061e-08
d
yr
n .2686605637871149 1.5091e-09 deg/d
Q 2.764963930498124 1.0354e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1031  
   data-arc span      14639 days (40.08 yr)  
   first obs. used      1980-03-23  
   last obs. used      2020-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5485  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:32:08  

Additional Information
 Earth MOID = .983356 au 
 Jupiter MOID = 2.22307 au 
 T_jup = 3.521 
[ 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 15.6   n/a MPO417080  
diameter diameter 1.766 km 0.327 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.271   0.111 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

38237 Roche           Discovered 1999 July 16 at Pises.
Astronomer and mathematician Edouard Roche (1820-1883), of the University of Montpellier, was known for his work on the sun, comets, celestial mechanics and, most notably, for the "Roche limit".
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050523/MPCPages.arcLast Updated: 2005-07-21

[ show close-approach data ]
Alternate Designations
 1999 OF = 1980 FS8 = 1997 XW7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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