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 ]  
91217 (1999 AM4)
Classification: Main-belt Asteroid          SPK-ID: 2091217
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05222458651695674 4.5231e-08  
a 2.151447796286945 7.1773e-09 au
q 2.039089324713042 9.5074e-08 au
i 4.261059664132246 2.8475e-06 deg
node 87.1362979235484 5.904e-05 deg
peri 70.60462722603272 6.5248e-05 deg
M 249.6385265524049 2.8911e-05 deg
tp 2459353.853693479816
(2021-May-19.35369348)
9.3249e-05 TDB
period 1152.642545255051
3.16
5.7679e-06
1.579e-08
d
yr
n .312325795609376 1.5629e-09 deg/d
Q 2.263806267860849 7.5521e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1373  
   data-arc span      9720 days (26.61 yr)  
   first obs. used      1993-03-23  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52781  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 08:46:54  

Additional Information
 Earth MOID = 1.0528 au 
 Jupiter MOID = 2.71112 au 
 T_jup = 3.699 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO337939  
diameter diameter 2.176 km 0.218 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.409   0.171 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91217 (1999 AM4)          Discovered 1999-Jan-11 by Kobayashi, T. at Oizumi
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1999 AM4 = 1993 FW83 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-26 08:35 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin