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7158 IRTF (1981 ES8)
Classification: Main-belt Asteroid          SPK-ID: 2007158
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1076420345480489 6.1308e-08  
a 3.014358213807275 2.1686e-08 au
q 2.689886562816437 1.7915e-07 au
i 9.664122024634429 6.7662e-06 deg
node 207.0874777814311 2.9621e-05 deg
peri 158.4311369581491 4.0884e-05 deg
M 81.16502699564529 2.6425e-05 deg
tp 2457169.519962372139
(2015-May-27.01996237)
0.00014014 JED
period 1911.572253334607
5.23
2.0629e-05
5.648e-08
d
yr
n .1883266506782595 2.0323e-09 deg/d
Q 3.338829864798113 2.4021e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1317  
   data-arc span      23604 days (64.62 yr)  
   first obs. used      1951-07-31  
   last obs. used      2016-03-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53896  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 15:55:25  

Additional Information
 Earth MOID = 1.6905 au 
 Jupiter MOID = 2.13708 au 
 T_jup = 3.218 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.7 mag n/a MPO347583  

7158 IRTF           Discovered 1981 Mar. 1 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
The 3-meter NASA Infrared Telescope Facility (IRTF) began operation on Mauna Kea in 1979. The IRTF provides valuable ground-based observations that support NASA planetary missions and basic solar system research, including extensive studies of minor planets and comets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050721/MPCPages.arcLast Updated: 2005-07-21

[ show close-approach data ]
Alternate Designations
 1981 ES8 = 1983 RO5 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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