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312979 (1999 KT4)
Classification: Mars-crossing Asteroid          SPK-ID: 2312979
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3673662656796456 4.8029e-08  
a 2.212969656164588 9.0207e-09 au
q 1.399999257517034 1.0238e-07 au
i 2.290899756215913 7.2079e-06 deg
node 111.4703904356285 0.00014272 deg
peri 127.6760132696713 0.00014373 deg
M 134.3897021731095 1.8465e-05 deg
tp 2458551.625322525312
(2019-Mar-09.12532253)
5.9327e-05 TDB
period 1202.435017548702
3.29
7.3522e-06
2.013e-08
d
yr
n .2993924783843207 1.8306e-09 deg/d
Q 3.025940054812141 1.2335e-08 au
  Orbit Determination Parameters
   # obs. used (total)      214  
   data-arc span      7473 days (20.46 yr)  
   first obs. used      1999-03-22  
   last obs. used      2019-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64569  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:02:36  

Additional Information
 Earth MOID = .389534 au 
 Jupiter MOID = 1.99314 au 
 T_jup = 3.563 
[ 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 17.7   n/a MPO494659  

312979 (1999 KT4)          Discovered 1999-May-18 by LINEAR at Socorro
Reference: 20120207/Numbers.arcLast Updated: 2012-02-09

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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
1905-Jun-12 10:35 00:01 Jupiter 1.98794228449943 1.98794191443789 1.98794265456891 0.124072208165085 n/a 2417008.940911231 1.43090600712564 571.114804018029 17.3074521968966 89.3573905312877 17177660.9429861 F 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
1920-May-12 12:38 < 00:01 Earth 0.404646464642521 0.404644809681871 0.40464811985276 0.592431647098725 0.581210665671681 2422457.026696467 0.79084573659676 516.198902774476 7.10958530115849 -79.9590115376938 283455.093606696 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
1953-Jun-11 17:25 < 00:01 Earth 0.456214781912677 0.456212917542911 0.456216646298313 1.20966960403326 1.204831830527 2434540.226015871 0.550653087832372 173.715539452789 35.3838001589754 -60.5766626098963 274016.114495618 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
1964-Sep-06 01:37 < 00:01 Jupiter 1.99900305190337 1.99900262315305 1.99900348065563 0.165390589215048 n/a 2438644.567693897 0.818354809333541 319.568405017956 20.3430918228054 88.8181843675134 14693515.9758439 F 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
1976-May-23 05:19 < 00:01 Earth 0.387117297777889 0.387117019573469 0.387117576173182 0.759753997599003 0.75063998703741 2442921.721690545 0.317844489373454 478.322144626202 6.89353148837774 -88.3304017174135 320109.193452851 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
1999-May-06 02:05 < 00:01 Earth 0.431345274043022 0.431344805919737 0.431345742166306 0.599312303935955 0.588915071464089 2451304.587131124 0.109253452179924 40.1712117049723 15.8612819742104 -69.56197872938 278622.775457434 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
2032-Jun-01 01:04 < 00:01 Earth 0.40058878891357 0.400587888972809 0.400589689042715 0.89069390358731 0.883194664032117 2463384.544135435 0.250316602878356 448.439843431501 9.61419333311414 -84.5431216386683 362603.235550332 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
2055-May-15 18:44 < 00:01 Earth 0.396696097959673 0.396695272242557 0.39669692392984 0.636396192476537 0.625752955171063 2471768.280617187 0.469304538378615 508.038968400813 6.11436358427328 -84.6817198051072 292627.131355944 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
2088-Jun-13 06:55 < 00:01 Earth 0.451306869366952 0.45130361795257 0.451310120972276 1.19452802252074 1.18957528470511 2483850.788519835 0.733936683319956 496.414987777702 22.836855793513 -71.5959305169642 318250.495098271 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
2104-Nov-17 08:20 00:03 Mars 0.094305749337727 0.0943014372453048 0.0943100614878513 5.804269132164 5.80374608597344 2489850.847166250 3.35646756670774 244.951365749531 27.8981941451243 28.8188257291922 263200.145426739 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
2111-May-30 05:59 < 00:01 Earth 0.389519798327623 0.389518605035392 0.389520991816561 0.85254437766889 0.844482725849439 2492235.749517047 0.787098031843323 473.51254118157 20.4901875094354 -83.5935484698385 328123.330003958 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
2131-Mar-18 06:35 00:04 Mars 0.0999731768469587 0.0999686653919196 0.0999776883504609 5.80082373071514 5.80033004392571 2499467.774099437 3.60860594817501 250.688144010413 27.7177490482549 26.3515635813686 258883.987873766 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
2134-May-13 12:55 < 00:01 Earth 0.415292311593777 0.415290120432248 0.415294502889251 0.635927690591107 0.625757302534701 2500620.038232740 0.844768462283666 393.172437274772 10.7818685592028 -73.5253400948416 307110.567755472 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
2144-May-26 14:35 00:03 Mars 0.0820998639184137 0.0820952431860085 0.0821044847711486 6.01865760298675 6.01807819427983 2504286.107430446 3.03896501728455 279.280647325074 26.7917015942755 34.5852669410996 277813.229491103 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
2167-Jun-18 03:27 < 00:01 Earth 0.462286718146181 0.462283232971529 0.462290203448806 1.29885353254314 1.29440840167761 2512708.643929740 0.74386726210492 426.433253720817 27.012170345839 -66.7037155555802 315202.807695041 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
2190-Jun-04 11:46 < 00:01 Earth 0.399588328223691 0.399586822498927 0.399589834137708 0.936050587472289 0.92889966108103 2521095.990470216 0.567113812952788 463.003265663529 22.1366219577323 -81.3084298356969 347110.764267192 T 9 CATAB v2.0f-lin.ifort 2019-Sep-24 06:02:38 2019-Sep-24 06:02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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