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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1080368047647996 7.9308e-08  
a 3.015840886821894 3.2498e-08 AU
q 2.690019073730617 2.4213e-07 AU
i 9.662147139112589 8.0558e-06 deg
node 207.0892324563466 4.2762e-05 deg
peri 158.5654798127448 5.3576e-05 deg
M 328.0789603767116 3.6115e-05 deg
tp 2457170.123332209645
(2015-May-27.62333221)
0.0001933 JED
period 1912.98279492507
5.24
3.0921e-05
8.466e-08
d
yr
n .1881877876555083 3.0418e-09 deg/d
Q 3.34166269991317 3.6009e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      957  
   data-arc span      22983 days (62.92 yr)  
   first obs. used      1951-07-31  
   last obs. used      2014-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52737  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:16:22  

Additional Information
 Earth MOID = 1.69183 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 12.5 mag n/a MPO263413  

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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