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

[ show orbit diagram ]
Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1084420448298295 8.768e-08  
a 3.015199064276123 3.2247e-08 AU
q 2.688224712177032 2.6243e-07 AU
i 9.664056038352605 9.034e-06 deg
node 207.1083394471464 4.7559e-05 deg
peri 158.6485906566253 5.8798e-05 deg
M 215.0929408466758 3.6964e-05 deg
tp 2457170.267291313851
(2015-May-27.76729131)		 0.00020127 JED
period 1912.372154207984
5.24		 3.0679e-05
8.399e-08		 d
yr
n .1882478780125803 3.0199e-09 deg/d
Q 3.342173416375215 3.5744e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      916  
   data-arc span      22542 days (61.72 yr)  
   first obs. used      1951-07-31  
   last obs. used      2013-04-18  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .55386  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 13:25:10  

Additional Information
 Earth MOID = 1.68945 AU 
 T_jup = 3.218 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.4 mag n/a PDS3 (MPC 28116)  

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

Alternate Designations
 1981 ES8 = 1983 RO5 
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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