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305509 (2008 ET146)
Classification: Main-belt Asteroid          SPK-ID: 2305509
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04056622858989312 6.6253e-08  
a 3.097009875164423 4.9967e-08 au
q 2.971375864623346 1.8568e-07 au
i 11.20267751222107 6.8886e-06 deg
node 104.8945654543142 3.7536e-05 deg
peri 16.10798289129479 0.00010676 deg
M 176.7973976972549 0.00010546 deg
tp 2458222.844878645799
(2018-Apr-14.34487865)
0.00057338 TDB
period 1990.729774711933
5.45
4.8177e-05
1.319e-07
d
yr
n .1808382054526178 4.3764e-09 deg/d
Q 3.222643885705499 5.1994e-08 au
  Orbit Determination Parameters
   # obs. used (total)      154  
   data-arc span      6760 days (18.51 yr)  
   first obs. used      2000-11-27  
   last obs. used      2019-06-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .66966  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 05:55:27  

Additional Information
 Earth MOID = 1.98909 au 
 Jupiter MOID = 1.87217 au 
 T_jup = 3.192 
[ 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 15.8   n/a MPO476361  

305509 (2008 ET146)          Discovered 2008-Mar-10 by CSS at Catalina
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ 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
1951-Mar-15 01:25 00:05 Jupiter 1.90186999382016 1.90186868971931 1.90187129793172 3.06833542919721 2.91958153196051 2433720.558874622 4.68525378083727 275.846353168633 24.3540284710791 77.5897483427821 2027695.12968153 T 10 CATAB v2.0f-lin.ifort 2021-Apr-14 05:55:27 2021-Apr-14 05:55
1961-Feb-09 21:37 00:04 Jupiter 1.95626246250217 1.95626153700349 1.95626338800553 4.02360848506936 3.91451979829294 2437340.400676629 3.59904261372224 225.688994267061 30.562031112654 -82.3002391091425 2430558.286744 T 10 CATAB v2.0f-lin.ifort 2021-Apr-14 05:55:27 2021-Apr-14 05:55
2011-May-22 12:40 < 00:01 Jupiter 1.96795591988528 1.96795508484232 1.96795675492812 3.17837144155077 3.03993922713626 2455704.027547520 0.374159246678182 91.4715799048073 30.6920219265451 83.3586684993799 1827146.71927404 T 10 CATAB v2.0f-lin.ifort 2021-Apr-14 05:55:27 2021-Apr-14 05:55
2021-Mar-18 13:18 < 00:01 Jupiter 1.87917392428953 1.87917312719692 1.87917472138204 3.65841295510496 3.53305837179077 2459292.053953140 0.575599502352419 80.1416208503274 33.8480936526585 86.0639823594923 1939352.73258911 T 10 CATAB v2.0f-lin.ifort 2021-Apr-14 05:55:27 2021-Apr-14 05:55
2081-May-09 12:17 00:05 Jupiter 1.88401942496273 1.88401868450118 1.88402016542418 3.14561961841293 2.9992928190349 2481259.011791772 5.00281424475194 313.886537661756 29.2160710981394 85.6980525516772 1968876.11928402 T 10 CATAB v2.0f-lin.ifort 2021-Apr-14 05:55:27 2021-Apr-14 05:55
2141-Jul-19 04:22 00:10 Jupiter 1.93497513725864 1.93497396047782 1.93497631408852 2.97113428064318 2.81995606363245 2503243.682023756 9.77237577079842 645.091434929868 28.032471500363 87.2792187923737 2000573.75125622 T 10 CATAB v2.0f-lin.ifort 2021-Apr-14 05:55:27 2021-Apr-14 05:55
2151-May-23 16:51 00:09 Jupiter 1.91018703706835 1.91018490490949 1.91018916929365 3.82200306556441 3.70416788378531 2506839.201889766 9.40201285044175 615.977942910652 31.6596253909014 -82.4355070578943 2214865.92474663 T 10 CATAB v2.0f-lin.ifort 2021-Apr-14 05:55:27 2021-Apr-14 05:55
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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