Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
42487 Angstrom (1991 RY2)
Classification: Main-belt Asteroid          SPK-ID: 2042487
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1359931597151899 4.8783e-08  
a 2.480702780741654 1.2214e-08 au
q 2.143344171274338 1.2487e-07 au
i 3.842749489287787 4.5348e-06 deg
node 279.5622043297186 7.2989e-05 deg
peri 61.78053549047421 7.6807e-05 deg
M 191.0857019322165 2.7291e-05 deg
tp 2459870.113867381706
(2022-Oct-17.61386738)
0.00011042 TDB
period 1427.120113660709
3.91
1.054e-05
2.886e-08
d
yr
n .2522562723025207 1.8631e-09 deg/d
Q 2.818061390208969 1.3876e-08 au
  Orbit Determination Parameters
   # obs. used (total)      871  
   data-arc span      10788 days (29.54 yr)  
   first obs. used      1991-09-09  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54904  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 05:22:03  

Additional Information
 Earth MOID = 1.13617 au 
 Jupiter MOID = 2.55741 au 
 T_jup = 3.463 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457080.5 (2015-Feb-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1370337984930057 4.8945e-08  
q 2.140452450324949 1.2542e-07 au
tp 2457013.402471052608
(2014-Dec-21.90247105)
0.00010102 TDB
node 279.7416855976052 7.3033e-05 deg
peri 61.0929266691124 7.6765e-05 deg
i 3.841987110503323 4.5334e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      871  
   data-arc span      10788 days (29.54 yr)  
   first obs. used      1991-09-09  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54904  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 05:22:03  

Additional Information
 Jupiter MOID = 2.55741 au 
 T_jup = 3.463 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.395584265694888E-15 -6.118974344389289E-15 1.197971152108537E-12 -1.647639375681992E-14 2.357978032173125E-13 1.979175765255503E-15
q -6.118974344389289E-15 1.572896411614749E-14 -2.639323929028541E-12 3.973498038625382E-14 -5.062366842851635E-13 -4.814626528268283E-15
tp 1.197971152108537E-12 -2.639323929028541E-12 1.020488397937289E-8 -9.154925525129234E-11 2.417128275731687E-9 2.663335034969755E-12
node -1.647639375681992E-14 3.973498038625382E-14 -9.154925525129234E-11 5.333821433018365E-9 -5.341901152008508E-9 -2.281034798426762E-11
peri 2.357978032173125E-13 -5.062366842851635E-13 2.417128275731687E-9 -5.341901152008508E-9 5.892860964940075E-9 2.333319134536486E-11
i 1.979175765255503E-15 -4.814626528268283E-15 2.663335034969755E-12 -2.281034798426762E-11 2.333319134536486E-11 2.055141717046211E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.15   n/a MPCxxxxx  

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
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-08 05:55 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin