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3949 Mach (1985 UL)
Classification: Main-belt Asteroid          SPK-ID: 2003949
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03203919096014903 3.1281e-08  
a 2.208081719429419 7.0095e-09 au
q 2.137336567565005 6.9801e-08 au
i 3.781494221969205 3.7219e-06 deg
node 249.8348103451488 5.7475e-05 deg
peri 304.2360019914541 9.4358e-05 deg
M 272.4451933914203 7.7321e-05 deg
tp 2458891.973202422367
(2020-Feb-12.47320242)
0.00025783 TDB
period 1198.453368084644
3.28
5.7067e-06
1.562e-08
d
yr
n .3003871569699441 1.4304e-09 deg/d
Q 2.278826871293832 7.2341e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2072  
   data-arc span      12782 days (35.00 yr)  
   first obs. used      1984-05-03  
   last obs. used      2019-05-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49835  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 18:29:57  

Additional Information
 Earth MOID = 1.13686 au 
 Jupiter MOID = 2.68956 au 
 T_jup = 3.656 
[ 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 13.3   n/a MPO425843  
SMASSII spectral type spec_B Sq   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

3949 Mach           Discovered 1985 Oct. 20 by A. Mrkos at Klet.
Named in memory of Ernst Mach (1838-1916), professor of physics at the universities of Graz and Prague and later professor of philosophy in Vienna. He made investigations on supersonic motion, explosions, electric sparks and philosophical positivism, and the Mach number and Mach's principle are forever associated with his name. Name suggested by J. Ticha and M. Šolc.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19960828/MPCPages.arcLast Updated: 2003-09-26

[ show close-approach data ]
Alternate Designations
 1985 UL = 1984 JB1 = 1985 VG1 = 1987 HE2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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