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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
46971 (1998 SE138)
Classification: Main-belt Asteroid          SPK-ID: 2046971
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08610378862495806 3.5068e-08  
a 2.742187176565173 1.5396e-08 au
q 2.506074471544135 9.8564e-08 au
i 5.60939252038436 5.7879e-06 deg
node 15.37769112028555 3.8721e-05 deg
peri 294.5943820939827 5.0473e-05 deg
M 251.5790474228624 3.26e-05 deg
tp 2459100.022193120243
(2020-Sep-07.52219312)
0.00015101 TDB
period 1658.609200978442
4.54
1.3968e-05
3.824e-08
d
yr
n .2170493204714106 1.8279e-09 deg/d
Q 2.978299881586211 1.6722e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1148  
   data-arc span      7544 days (20.65 yr)  
   first obs. used      1998-09-14  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57453  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:34:40  

Additional Information
 Earth MOID = 1.4976 au 
 Jupiter MOID = 2.24135 au 
 T_jup = 3.337 
[ 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 14.4   n/a MPO337633  
diameter diameter 6.941 km 0.217 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.070   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46971 (1998 SE138)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 SE138 = 2000 AX31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin