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

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1359931566415876 4.9157e-08  
a 2.480702780146236 1.2278e-08 au
q 2.143344178384587 1.2565e-07 au
i 3.842749768957876 4.7164e-06 deg
node 279.5622039817457 7.3016e-05 deg
peri 61.7805370654655 7.6871e-05 deg
M 191.0857013129708 2.732e-05 deg
tp 2459870.113869595452
(2022-Oct-17.61386960)
0.00011052 TDB
period 1427.120113146903
3.91
1.0595e-05
2.901e-08
d
yr
n .2522562723933405 1.8728e-09 deg/d
Q 2.818061381907884 1.3948e-08 au
  Orbit Determination Parameters
   # obs. used (total)      855  
   data-arc span      10780 days (29.51 yr)  
   first obs. used      1991-09-09  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55057  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:09:10  

Additional Information
 Earth MOID = 1.13617 au 
 Jupiter MOID = 2.55741 au 
 T_jup = 3.463 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456994.5 (2014-Dec-03.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1370866409374239 4.9328e-08  
q 2.140458724899949 1.2623e-07 au
tp 2457013.433755208024
(2014-Dec-21.93375521)
0.00010119 TDB
node 279.7430261356483 7.3057e-05 deg
peri 61.1018786529101 7.6822e-05 deg
i 3.842019890336001 4.7149e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      855  
   data-arc span      10780 days (29.51 yr)  
   first obs. used      1991-09-09  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55057  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:09:10  

Additional Information
 Jupiter MOID = 2.55741 au 
 T_jup = 3.463 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.433219709244286E-15 -6.206600791009413E-15 1.158009078343733E-12 -1.593887341468258E-14 2.20139885319237E-13 1.848048774905397E-15
q -6.206600791009413E-15 1.593306973728949E-14 -2.548680847044303E-12 3.851259088121731E-14 -4.704003497350573E-13 -4.478083889904641E-15
tp 1.158009078343733E-12 -2.548680847044303E-12 1.02384995722182E-8 -9.111548270503329E-11 2.430260950226295E-9 2.18922633510738E-12
node -1.593887341468258E-14 3.851259088121731E-14 -9.111548270503329E-11 5.337363141702745E-9 -5.345375304417712E-9 -2.538648849753982E-11
peri 2.20139885319237E-13 -4.704003497350573E-13 2.430260950226295E-9 -5.345375304417712E-9 5.901647078145536E-9 2.579045339980118E-11
i 1.848048774905397E-15 -4.478083889904641E-15 2.18922633510738E-12 -2.538648849753982E-11 2.579045339980118E-11 2.223002121993966E-11

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 15.13   n/a E2021B10  

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

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