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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1366894212003546 1.3547e-07  
a 2.480345273876422 3.2883e-08 au
q 2.141308314013219 3.1618e-07 au
i 3.841467619099423 8.2567e-06 deg
node 279.7328984055641 0.00010427 deg
peri 61.08819443679582 0.00013208 deg
M 148.1818818821218 0.00010089 deg
tp 2457013.201025026173
(2014-Dec-21.70102503)
0.00038985 JED
period 1426.811620321894
3.91
2.8374e-05
7.768e-08
d
yr
n .2523108130551829 5.0175e-09 deg/d
Q 2.819382233739625 3.7378e-08 au
  Orbit Determination Parameters
   # obs. used (total)      533  
   data-arc span      8942 days (24.48 yr)  
   first obs. used      1991-09-09  
   last obs. used      2016-03-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58895  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 17:32:54  

Additional Information
 Earth MOID = 1.135 au 
 Jupiter MOID = 2.54383 au 
 T_jup = 3.463 
[ 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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