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399307 (1991 RJ2)
Classification: Amor [NEO]          SPK-ID: 2399307
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4276982152349026 5.2287e-08  
a 2.209084273351439 4.8432e-09 au
q 1.264262872335537 1.155e-07 au
i 8.947483502830734 7.5083e-06 deg
node 171.7733778708338 1.6354e-05 deg
peri 150.9451922136811 2.3189e-05 deg
M 36.00321674744384 7.9909e-06 deg
tp 2459276.562316381677
(2021-Mar-03.06231638)
2.6484e-05 TDB
period 1199.269676525834
3.28
3.9439e-06
1.08e-08
d
yr
n .3001826920554555 9.8717e-10 deg/d
Q 3.153905674367341 6.9146e-09 au
  Orbit Determination Parameters
   # obs. used (total)      217  
   data-arc span      10424 days (28.54 yr)  
   first obs. used      1991-09-08  
   last obs. used      2020-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42373  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 11:54:41  

Additional Information
 Earth MOID = .263773 au 
 Jupiter MOID = 2.23623 au 
 T_jup = 3.519 
[ 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 18.89   n/a E2021B25  
rotation period rot_per 3.4807 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D.; Pollock, J.T.; Reichart, D.E.; Haislip, J.B.; LaCluyze, A.P.; Verveer, A.; Spuck, T.; Harris, A.W. (2015) Minor Planet Bull. 42, 37-38.]

399307 (1991 RJ2)          Discovered 1991-Sep-08 by Helin, E. F. at Palomar
Reference: Last Updated: 2014-07-14

[ 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
1922-Aug-16 07:00 < 00:01 Earth 0.283739237385379 0.283736721910071 0.283741752867365 5.13552857473571 5.13369969500091 2423282.791728661 0.420949467565752 143.503088165194 21.9340368449714 -29.4736793689427 603033.038479691 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
1945-Aug-17 20:36 < 00:01 Earth 0.270661880901317 0.270660731862341 0.270663029943463 5.10760789971342 5.10568015431062 2431685.358630881 0.265280427627251 76.0139073525388 21.6331380574133 -43.3038147532726 761654.858707274 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
1968-Aug-19 17:34 < 00:01 Earth 0.261130246445282 0.26112985489555 0.261130637995043 5.03055976737316 5.02853102712284 2440088.231878889 0.160019220613788 36.5419717848467 19.3395492539241 -85.1229554837777 1082794.70732031 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
1991-Aug-23 03:16 < 00:01 Earth 0.266926744614403 0.266926244042248 0.2669272451868 4.93701693105337 4.93499463559267 2448491.636359053 0.0960028565386018 29.2847120209793 13.658340222786 36.2400204284516 1684734.62661688 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
2014-Aug-26 05:24 < 00:01 Earth 0.290090108597102 0.290089657745421 0.290090559448832 4.92130880357902 4.91944207492357 2456895.724799402 0.0587532501628677 23.3822824115575 13.8287747947363 19.9415612511053 1598023.14439212 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
2037-Aug-30 13:24 < 00:01 Earth 0.336396324039427 0.336395387132595 0.336397260946355 4.93896684588404 4.93736287850864 2465301.058479222 0.127432556355787 47.4997390642833 13.9480859646536 10.8784754386791 1186619.7203374 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
2060-Sep-03 06:53 < 00:01 Earth 0.375216080187902 0.375214262411836 0.375217897964289 4.90538052510259 4.90393267930847 2473705.786853753 0.259197553268366 92.2807046467838 14.7735527976569 10.9310713140167 953526.029568062 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
2077-Feb-23 15:19 < 00:01 Mars 0.0363242958967083 0.0363230477209953 0.0363255442674496 7.93596884737057 7.93497564851389 2479723.138497944 0.663878080996521 151.810836396358 17.7206212444326 66.6871884514838 278059.924536885 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
2083-Sep-08 19:50 < 00:01 Earth 0.416572275788047 0.416569210135077 0.416575341443479 4.85692253498198 4.85560543207816 2482111.326191944 0.480396952125038 161.09018702422 16.7116581043992 18.4649065166111 1093279.16956487 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
2106-Sep-14 07:48 < 00:01 Earth 0.457564165829401 0.457558988393215 0.457569343289439 4.79262461485515 4.79140943097628 2490516.824994351 0.885478374099797 306.556031037241 20.2516881298718 32.6947197097692 1153199.3640312 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
2119-Jul-26 06:13 00:02 Earth 0.491247136706052 0.491240913854288 0.491253359581692 3.97388147112798 3.97251634739447 2495214.758854005 1.68374942897165 354.620381362163 30.7462056059951 28.844542662679 381585.559944993 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
2142-Aug-04 07:00 00:02 Earth 0.439198273900339 0.439190750910186 0.439205796899705 5.1200314005205 5.11884637045411 2503624.791724800 1.60189183958056 388.388129586978 25.4186724926622 14.9108495536505 908985.338989552 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
2165-Aug-11 10:23 00:01 Earth 0.381851130801414 0.381843392042365 0.381858869561093 5.71109165084351 5.70986972286572 2512032.932507622 1.11059530386352 386.682369042253 22.6965355228323 3.56263177147743 269429.496372657 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
2188-Aug-16 11:38 < 00:01 Earth 0.324506300498937 0.324499745310368 0.324512855689518 5.72312010904722 5.72168524481992 2520438.984421092 0.736810578478411 329.346702345018 20.7665845885707 -7.08197059851573 256806.0520317 T 62 CATAB v2.0f-lin.ifort 2021-Apr-14 11:54:42 2021-Apr-14 11:54
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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