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3949 Mach (1985 UL)
Classification: Main-belt Asteroid          SPK-ID: 2003949
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03222966285191763 5.0338e-08  
a 2.208073314676634 1.1103e-08 AU
q 2.13690785619229 1.0794e-07 AU
i 3.779810103072849 4.6936e-06 deg
node 249.8905178645193 8.8743e-05 deg
peri 305.0095763643191 0.00013204 deg
M 150.9871781141754 9.7584e-05 deg
tp 2456497.860947216236
(2013-Jul-24.36094722)
0.0003253 JED
period 1198.446525474647
3.28
9.0393e-06
2.475e-08
d
yr
n .300388872050358 2.2657e-09 deg/d
Q 2.279238773160978 1.1461e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1215  
   data-arc span      11066 days (30.30 yr)  
   first obs. used      1984-05-03  
   last obs. used      2014-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52445  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 13:59:34  

Additional Information
 Earth MOID = 1.13738 AU 
 T_jup = 3.656 
[ 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 13.3 mag n/a PDS3 (MPC 28111)  
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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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