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213001 (1981 EP3)
Classification: Main-belt Asteroid          SPK-ID: 2213001
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1626233027518632 5.4004e-08  
a 3.148339321855906 3.0818e-08 au
q 2.636345983152137 1.6117e-07 au
i 9.033197465147767 5.3142e-06 deg
node 228.7289739875792 3.1998e-05 deg
peri 302.0599705931583 3.7907e-05 deg
M 94.12981887197668 1.5643e-05 deg
tp 2458862.986455444440
(2020-Jan-14.48645544)
9.0265e-05 TDB
period 2040.425428856115
5.59
2.996e-05
8.203e-08
d
yr
n .1764337941043109 2.5906e-09 deg/d
Q 3.660332660559674 3.583e-08 au
  Orbit Determination Parameters
   # obs. used (total)      264  
   data-arc span      14374 days (39.35 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .60457  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 03:29:39  

Additional Information
 Earth MOID = 1.65587 au 
 Jupiter MOID = 1.42698 au 
 T_jup = 3.169 
[ 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 15.94   n/a E2021B55  
diameter diameter 5.316 km 0.240 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.025   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

213001 (1981 EP3)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20090509/Numbers.arcLast Updated: 2009-05-11

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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
1928-Dec-30 00:29 00:04 Jupiter 1.60065837837607 1.60065586805279 1.60066088873047 2.99113154065112 2.80865185600861 2425610.520024384 4.15937333333943 398.364708727506 31.7180055960463 77.0045146722532 2180937.2622469 T 20 CATAB v2.0g-lin.ifort 2021-Jul-09 03:29:40 2021-Jul-09 03:29
1939-May-23 16:46 00:04 Jupiter 1.46817016048859 1.46816909299901 1.46817122799245 1.40216334162835 0.901229249382943 2429407.198787428 3.92754650170765 1255.74054350384 211.818083306533 -12.5921281128797 640895.966413476 T 20 CATAB v2.0g-lin.ifort 2021-Jul-09 03:29:40 2021-Jul-09 03:29
1949-Jul-28 01:02 00:03 Jupiter 1.88219686067563 1.88219521385666 1.88219850749258 2.55731397600417 2.37483025178903 2433125.543104655 3.18003683508763 78.7755338354255 27.6940458168053 -89.4959423902286 570739.727168849 T 20 CATAB v2.0g-lin.ifort 2021-Jul-09 03:29:40 2021-Jul-09 03:29
2023-Aug-11 08:53 < 00:01 Jupiter 1.49118803250822 1.49118733560401 1.4911887294132 2.69775361648717 2.47827307051946 2460167.870260108 0.700932920633592 113.871130033168 31.4372432299589 86.6216290978374 1935032.45939566 T 20 CATAB v2.0g-lin.ifort 2021-Jul-09 03:29:40 2021-Jul-09 03:29
2033-Dec-23 00:03 00:02 Jupiter 1.5377086049475 1.53770738566835 1.53770982423731 1.19445572067159 0.570136860914521 2463954.501923435 1.61786225165346 2171.80538677319 335.304629270714 10.4759868647674 1030280.68497588 T 20 CATAB v2.0g-lin.ifort 2021-Jul-09 03:29:40 2021-Jul-09 03:29
2107-Oct-21 00:38 00:05 Jupiter 1.89594036198026 1.89593597645292 1.89594474750965 3.68606094873627 3.56279855607465 2490918.526433907 4.83702580463659 245.436182693031 61.7875968075031 37.375250644792 1179908.60957168 T 20 CATAB v2.0g-lin.ifort 2021-Jul-09 03:29:40 2021-Jul-09 03:29
2118-Mar-29 19:16 00:05 Jupiter 1.41567436914996 1.41567317863195 1.41567555976349 2.48536447633439 2.23168141023556 2494731.303005394 5.24847590927712 695.632675374066 36.6181720876387 -89.2203488598904 1689357.121925 T 20 CATAB v2.0g-lin.ifort 2021-Jul-09 03:29:40 2021-Jul-09 03:29
2128-Jul-23 20:00 00:08 Jupiter 1.64024541343889 1.64024096765093 1.64024985934378 1.18150305120818 0.602619057712146 2498500.333157777 7.54828521712507 1694.42870904937 987.067939001821 -39.0887501883787 812040.346934903 T 20 CATAB v2.0g-lin.ifort 2021-Jul-09 03:29:40 2021-Jul-09 03:29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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