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 ]  
136577 (1981 EN38)
Classification: Outer Main-belt Asteroid          SPK-ID: 2136577
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0794444587559246 5.2126e-08  
a 3.209427162393346 3.1258e-08 au
q 2.954455958560443 1.6694e-07 au
i 12.4514062181203 5.6973e-06 deg
node 197.362355139826 2.1343e-05 deg
peri 23.98523804225071 3.4374e-05 deg
M 268.830626449701 2.8147e-05 deg
tp 2459532.346349362620
(2021-Nov-13.84634936)
0.00016662 TDB
period 2100.098731784202
5.75
3.0681e-05
8.4e-08
d
yr
n .1714205120699973 2.5043e-09 deg/d
Q 3.464398366226248 3.3741e-08 au
  Orbit Determination Parameters
   # obs. used (total)      478  
   data-arc span      14216 days (38.92 yr)  
   first obs. used      1981-03-01  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56174  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 07:41:19  

Additional Information
 Earth MOID = 1.95223 au 
 Jupiter MOID = 1.50736 au 
 T_jup = 3.150 
[ 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 14.9   n/a MPO469436  
diameter diameter 5.252 km 0.187 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.084   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

136577 (1981 EN38)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ 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-Jul-07 13:38 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin