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157825 (1997 RE8)
Classification: Main-belt Asteroid          SPK-ID: 2157825
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1404756133829336 3.9973e-08  
a 3.174553265156728 2.4649e-08 au
q 2.728605948017042 1.2494e-07 au
i 5.857565490856369 5.3867e-06 deg
node 31.25816950640251 4.0005e-05 deg
peri 275.7189749083203 4.4235e-05 deg
M 80.76687561348454 1.8601e-05 deg
tp 2458736.996373277106
(2019-Sep-10.49637328)
0.00010634 TDB
period 2065.962120644211
5.66
2.4062e-05
6.588e-08
d
yr
n .1742529528507252 2.0295e-09 deg/d
Q 3.620500582296414 2.8112e-08 au
  Orbit Determination Parameters
   # obs. used (total)      437  
   data-arc span      8521 days (23.33 yr)  
   first obs. used      1997-09-12  
   last obs. used      2021-01-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52705  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 19:50:22  

Additional Information
 Earth MOID = 1.72012 au 
 Jupiter MOID = 1.67421 au 
 T_jup = 3.178 
[ 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 15.23   n/a MPCxxxxx  
diameter diameter 6.727 km 1.475 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.032   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

157825 (1997 RE8)          Discovered 1997-Sep-12 by Wolf, M., Sarounova, L. at Ondrejov
Reference: 20070601/Numbers.arcLast Updated: 2007-06-06

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Alternate Designations
 1997 RE8 = 2003 SD225 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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