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 ]  
39499 (1981 EJ29)
Classification: Main-belt Asteroid          SPK-ID: 2039499
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04480546147087538 4.3166e-08  
a 3.015529104676842 1.9871e-08 au
q 2.88041693156294 1.3567e-07 au
i 9.686891708225884 6.5172e-06 deg
node 197.2712060618423 2.4634e-05 deg
peri 287.894387972488 7.3245e-05 deg
M 221.980324304814 6.9347e-05 deg
tp 2459733.800895592570
(2022-Jun-03.30089559)
0.00036943 TDB
period 1912.686152055151
5.24
1.8905e-05
5.176e-08
d
yr
n .1882169741299093 1.8604e-09 deg/d
Q 3.150641277790744 2.0761e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1129  
   data-arc span      14509 days (39.72 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5243  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 00:21:02  

Additional Information
 Earth MOID = 1.91281 au 
 Jupiter MOID = 1.8915 au 
 T_jup = 3.225 
[ 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 14.0   n/a MPO347804  
diameter diameter 5.596 km 1.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.170   0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

39499 (1981 EJ29)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1915-Oct-08 23:22 00:03 Jupiter 1.91642474413355 1.91642420065297 1.91642528761434 3.91670383856461 3.8021846093182 2420779.473612258 2.92929514468411 218.597511470201 23.359023382075 -87.3594055109684 2371336.90943601 T 23 CATAB v2.0f-lin.ifort 2020-Nov-13 00:21:05 2020-Nov-13 00:21
1962-Sep-12 07:35 00:02 Jupiter 1.9454964380413 1.94549585705184 1.94549701903109 3.5750148479309 3.45108375770341 2437919.816099099 1.60463460691794 110.173613089964 21.9642896791257 -81.8671804385522 2307758.8015887 T 23 CATAB v2.0f-lin.ifort 2020-Nov-13 00:21:05 2020-Nov-13 00:21
2047-Apr-13 03:30 < 00:01 Jupiter 1.961525739506 1.9615252250958 1.96152625391621 4.41351408667797 4.31456489017712 2468813.645941088 0.920422911812885 78.5453657593422 22.8030537829763 86.4659588649589 2901882.54000808 T 23 CATAB v2.0f-lin.ifort 2020-Nov-13 00:21:05 2020-Nov-13 00:21
2094-Mar-26 00:23 00:02 Jupiter 1.91156232524577 1.9115617741909 1.91156287630108 4.20851161788407 4.10187278696552 2485962.516161069 2.2686454851528 180.495134272936 23.6108100729777 88.1480185888154 2602077.52331575 T 23 CATAB v2.0f-lin.ifort 2020-Nov-13 00:21:05 2020-Nov-13 00:21
2141-Mar-06 00:32 00:04 Jupiter 1.89981095245282 1.89981036144578 1.89981154346278 3.94248435257367 3.82772667518566 2503108.522551062 3.69348359155977 276.971604126314 23.3818342394948 -86.1413330904582 2403526.57703233 T 23 CATAB v2.0f-lin.ifort 2020-Nov-13 00:21:05 2020-Nov-13 00:21
2188-Feb-09 10:44 00:05 Jupiter 1.93308604293556 1.93308487169851 1.93308721418964 3.64807598309554 3.52592060287207 2520249.947308344 5.22581235972049 329.337483634842 22.3943760853646 -78.9093656612527 2357692.00750223 T 23 CATAB v2.0f-lin.ifort 2020-Nov-13 00:21:05 2020-Nov-13 00:21

Alternate Designations
 1981 EJ29 = 1992 HK7 = 1994 TN17 
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-23 23:13 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin