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 ]  
19937 (1981 EF15)
Classification: Main-belt Asteroid          SPK-ID: 2019937
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06984297327138779 4.5125e-08  
a 3.077681485391456 2.3002e-08 au
q 2.862727059669416 1.4369e-07 au
i 9.013780066565548 5.2343e-06 deg
node 325.675412927968 2.6744e-05 deg
peri 321.3682761843575 4.5561e-05 deg
M 33.09317337868669 3.4191e-05 deg
tp 2459019.211669877270
(2020-Jun-18.71166988)
0.00018784 TDB
period 1972.122712360227
5.40
2.2109e-05
6.053e-08
d
yr
n .1825444216750355 2.0465e-09 deg/d
Q 3.292635911113497 2.4609e-08 au
  Orbit Determination Parameters
   # obs. used (total)      909  
   data-arc span      16173 days (44.28 yr)  
   first obs. used      1976-05-31  
   last obs. used      2020-09-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .524  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:09:44  

Additional Information
 Earth MOID = 1.85126 au 
 Jupiter MOID = 1.93299 au 
 T_jup = 3.206 
[ 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 14.56   n/a E2021B10  
diameter diameter 3.761 km 1.256 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.165   0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19937 (1981 EF15)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EF15 = 2000 XA20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-17 06:30 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin