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42487 Angstrom (1991 RY2)
Classification: Main-belt Asteroid          SPK-ID: 2042487
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1370844192139697 1.3641e-07  
a 2.480496530563699 3.8534e-08 AU
q 2.140459104309107 3.1712e-07 AU
i 3.842016144995758 8.3156e-06 deg
node 279.7430105803027 0.00012198 deg
peri 61.1012391630743 0.0001484 deg
M 356.7374866896017 0.0001033 deg
tp 2457013.431715877950
(2014-Dec-21.93171588)
0.00040973 JED
period 1426.942137285504
3.91
3.3251e-05
9.104e-08
d
yr
n .2522877351458931 5.8788e-09 deg/d
Q 2.820533956818291 4.3816e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      475  
   data-arc span      7892 days (21.61 yr)  
   first obs. used      1991-09-09  
   last obs. used      2013-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59831  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-10 05:46:16  

Additional Information
 Earth MOID = 1.13545 AU 
 T_jup = 3.462 
[ 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 15.0 mag n/a MPO259631  

42487 Ångström           Discovered 1991 Sept. 9 by F. Börngen and L. D. Schmadel at Tautenburg.
Swedish physicist Anders Jonas Ångström (1814-1874) is a cofounder of astrospectroscopy. He measured the wavelengths of about 1000 Fraunhofer lines, discovering among them some hydrogen lines. The `angstrom', a unit of length equal to the 10-10 meters, was named for him.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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