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 ]  
101217 (1998 SG54)
Classification: Main-belt Asteroid          SPK-ID: 2101217
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1554728004946221 7.1189e-08  
a 2.558400857898551 1.4962e-08 au
q 2.160639111733219 1.8548e-07 au
i 12.33996301177789 7.0704e-06 deg
node 356.6919106223846 2.6538e-05 deg
peri 304.3021809415005 3.1436e-05 deg
M 154.619513532952 1.7306e-05 deg
tp 2458358.532389872129
(2018-Aug-28.03238987)		 6.9792e-05 TDB
period 1494.690640045124
4.09		 1.3112e-05
3.59e-08		 d
yr
n .240852515132584 2.1128e-09 deg/d
Q 2.956162604063883 1.7288e-08 au
   Orbit Determination Parameters
   # obs. used (total)      547  
   data-arc span      8073 days (22.10 yr)  
   first obs. used      1998-09-14  
   last obs. used      2020-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5784  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:01:47  

Additional Information
 Earth MOID = 1.17276 au 
 Jupiter MOID = 2.40234 au 
 T_jup = 3.387 
[ show covariance matrix ]

[ 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 15.4   n/a MPO449613  
diameter diameter 1.917 km 0.463 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.365   0.198 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101217 (1998 SG54)          Discovered 1998-Sep-16 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-26 22:10 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin