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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1368864591525518 1.3569e-07  
a 2.479932269850342 3.4808e-08 au
q 2.140463122492378 3.1626e-07 au
i 3.84212828384695 8.3074e-06 deg
node 279.7371932682837 0.00011284 deg
peri 61.04960789166221 0.00013978 deg
M 97.73644744536053 0.0001017 deg
tp 2457013.231471822084
(2014-Dec-21.73147182)
0.00039604 JED
period 1426.4552660561
3.91
3.0032e-05
8.222e-08
d
yr
n .2523738448492235 5.3134e-09 deg/d
Q 2.819401417208306 3.9573e-08 au
  Orbit Determination Parameters
   # obs. used (total)      496  
   data-arc span      8867 days (24.28 yr)  
   first obs. used      1991-09-09  
   last obs. used      2015-12-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60009  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 14:45:51  

Additional Information
 Earth MOID = 1.13296 au 
 Jupiter MOID = 2.54271 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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