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450894 (2008 BT18)
Classification: Apollo [NEO, PHA]          SPK-ID: 2450894
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 105 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5932555775811869 1.5219e-08  
a 2.221917854010371 2.5426e-09 au
q .9037526941914972 3.4317e-08 au
i 8.135297131750137 5.5894e-06 deg
node 107.6233101389568 1.7566e-05 deg
peri 139.3536524702196 1.8111e-05 deg
M 222.0821492254497 3.0184e-06 deg
tp 2459463.955888931625
(2021-Sep-06.45588893)
1.0875e-05 TDB
period 1209.735498910286
3.31
2.0765e-06
5.685e-09
d
yr
n .2975857121860799 5.1081e-10 deg/d
Q 3.540083013829245 4.051e-09 au
  Orbit Determination Parameters
   # obs. used (total)      424  
   # delay obs. used      2  
   # Doppler obs. used      1  
   data-arc span      23221 days (63.58 yr)  
   first obs. used      1955-03-14  
   last obs. used      2018-10-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46461  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:19:22  

Additional Information
 Earth MOID = .0106433 au 
 Jupiter MOID = 1.54727 au 
 T_jup = 3.383 
[ 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 18.3   n/a MPO264974  
rotation period rot_per 2.5702 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2008) http://www.asu.cas.cz/~ppravec/neo.htm]

450894 (2008 BT18)          Discovered 2008-Jan-31 by LINEAR at Socorro
Reference: Last Updated: 2015-11-30

[ 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
1902-Jun-05 17:51 00:04 Earth 0.135730155132077 0.135726801344376 0.135733508998004 10.7668219357461 10.7649985218628 2415906.243842340 3.6261363353782 233.248785824909 5.52688068233527 -44.2079404605816 2392614.41409294 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
1912-Apr-03 04:45 < 00:01 Earth 0.164591398600248 0.16458856679054 0.164594230533248 14.7225698174689 14.7214702096549 2419495.697669843 0.696479515577051 266.321269482639 14.2647709049833 -58.1137352778643 1383642.58154757 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
1917-Mar-31 20:14 < 00:01 Jupiter 1.967067110029 1.96706607565375 1.96706814440436 4.66244739676893 4.56915881231746 2421319.342730372 0.19572611288515 66.0854599334828 42.2383689701139 59.4095113813882 2955267.54382354 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
1922-Mar-10 07:40 < 00:01 Earth 0.480273818474452 0.480273257144679 0.480274379804226 26.2116213183506 26.2114096619955 2423123.819221895 0.0231022657721939 28.0030823330034 12.8117947835209 -1.88899484436875 2411883.36242461 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
1945-Jul-25 06:02 00:01 Earth 0.109591380596685 0.109578636440917 0.109604124779727 16.1115594961006 16.1100503936684 2431661.751452630 1.46379306724309 641.321259215888 5.81213289332268 7.74112090937567 356278.896527643 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
1953-Sep-28 18:17 00:01 Jupiter 1.68889040407917 1.68888840820052 1.68889239995772 3.73155005839429 3.59463680487266 2434649.261648306 1.13808769522598 97.1244472721759 45.1926114991346 17.5112324742676 1666931.49425071 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
1955-Jun-09 07:51 00:04 Earth 0.127039277182591 0.127034994560942 0.127043559910849 10.7261339088629 10.7241783507802 2435267.827056830 3.78743883101493 281.636115259376 6.18436528348116 -40.6992889052188 1917246.61162555 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
1962-Apr-07 03:14 < 00:01 Mars 0.0908644605136757 0.0908616880274495 0.0908672337467831 15.615664881963 15.6154631129546 2437761.634799924 0.779332907377384 435.054430232897 12.5286363372964 71.5397472688722 1024148.66852786 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
1965-Apr-11 07:12 00:02 Earth 0.143023679284502 0.143021818003394 0.143025540995116 12.8583381680585 12.8568892492939 2438861.799801368 1.57427970935572 406.268973414136 14.2126919977587 -76.9468574694099 1441450.78220488 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
1975-Mar-19 17:39 < 00:01 Earth 0.362273426974698 0.362267101203729 0.362279752766157 22.0220034264218 22.0216694449727 2442491.235481982 0.546590513799332 343.50860917994 14.6744079262409 -23.3471081954624 1350446.42172026 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
1976-Dec-05 18:41 < 00:01 Jupiter 1.60023437822454 1.6002334125311 1.60023534391807 3.78124948103808 3.63857452403572 2443118.278304187 0.580243758537301 64.6956066724188 32.5928967786719 58.276376722817 2829260.35745984 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
1998-Aug-15 08:08 < 00:01 Earth 0.451018960025143 0.451016858630419 0.451021061419868 25.6490202398478 25.648789910792 2451040.839091023 0.153304701541275 104.891080035812 6.91558837887656 2.55664983728199 718428.747659232 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2008-Jul-14 14:56 < 00:01 Earth 0.0150803114772706 0.0150801735777366 0.0150804493768097 13.0449471733354 13.0313957361254 2454662.121913896 0.00767606853343544 6.9057655781634 4.81572707692691 -7.36327609307416 329248.038557429 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2018-Apr-15 13:20 < 00:01 Earth 0.141121123399509 0.141120832439335 0.141121414359683 12.2933659088252 12.2918299603231 2458224.055334541 0.0726325415866645 14.5403355347519 10.1146060547844 5.23280636837735 1461740.38822496 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2028-Mar-12 09:12 < 00:01 Earth 0.477547061940956 0.477546593860299 0.477547530021667 25.8444796646477 25.8442637758039 2461842.883624160 0.0659982745167846 25.9343306403625 14.2819910362608 -31.4795462780721 3238058.05123888 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2036-Jul-19 18:02 < 00:01 Jupiter 1.5432701116121 1.54326985599503 1.5432703672296 3.53156245504288 3.37257098355211 2464894.251099425 0.113491941429633 45.0847402127281 6.12160779183418 -75.5132318183539 15843319.0962345 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2051-Jul-31 10:16 < 00:01 Earth 0.187006443637803 0.18700522762409 0.187007659651707 18.0128705584023 18.0120795476385 2470383.927958870 0.120446136534524 61.3977403165223 7.13451875737985 9.09594220422417 708063.252675371 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2059-Sep-09 17:12 < 00:01 Jupiter 1.90717462758336 1.90717384620494 1.9071754089618 4.5854001964284 4.48749890762937 2473346.216762504 0.136177622119391 45.2093945999404 37.8635576588294 81.1635526107034 4179710.43819304 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2061-Jun-17 13:35 < 00:01 Earth 0.119270016171699 0.119269443051253 0.119270589293425 11.0827462769952 11.0807303574848 2473993.066233709 0.375595351434598 34.9240268174873 6.75267247775956 -35.8598294882729 1600598.40448871 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2071-Mar-22 19:57 < 00:01 Earth 0.316848056011286 0.316847190873329 0.316848921149945 20.813451711228 20.8130476739697 2477558.331266011 0.0990988171844786 49.9860627076299 15.1233852099973 -32.0034509845978 1698152.96424537 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2094-Jul-30 12:00 < 00:01 Earth 0.158177414021635 0.158176873557386 0.158177954485957 17.3929647119305 17.3919961969075 2486088.999661527 0.0582590731917325 27.4662822715994 6.95617967880072 11.5063156561681 1009528.05446459 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2096-Feb-19 12:31 < 00:01 Jupiter 1.68990341715473 1.68990301414022 1.68990382016923 3.72734093446366 3.59035090795041 2486658.021694544 0.104797185354484 49.6151768834152 17.0246781715056 -80.7783718059559 5236109.93781543 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2104-Jun-26 04:33 < 00:01 Earth 0.090812320939956 0.0908121898671965 0.0908124520127516 11.0369620288986 11.034303322719 2489706.689384311 0.0700088782428381 8.90904542093442 5.77044225017842 -63.1094421378357 2263479.8727534 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2114-Apr-08 11:17 < 00:01 Earth 0.17282277258044 0.17282234492868 0.172823200232416 14.7024965145175 14.7014478518875 2493279.969980367 0.0456500747149024 24.8527084207857 13.8496171376396 -38.2092992988718 1341967.23263527 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2119-Apr-14 11:40 < 00:01 Jupiter 1.63125422750295 1.63125358231613 1.63125487268977 3.9048141208493 3.76949346347392 2495111.986324588 0.0896451553909218 41.9384830360933 30.7315017871218 -89.8242996935931 4370236.99796011 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2137-Aug-16 02:00 < 00:01 Earth 0.414868906369837 0.414867683718597 0.414870129021124 24.628482528027 24.62822175293 2501810.583621088 0.0983444287738971 61.4203490849945 7.50782397058547 7.01070220472666 1308061.62528486 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2147-Jun-30 09:23 < 00:01 Earth 0.0904280411572941 0.09042712746805 0.0904289548518636 11.360065152247 11.3574711042989 2505415.890808446 0.423965197729065 57.4015648062798 6.04206512312617 -37.7054931380728 1443542.04745022 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2155-Sep-24 05:17 < 00:01 Jupiter 1.97040892050938 1.97040808824134 1.97040975277741 4.09349664860747 3.98710069304293 2508423.720328244 0.13867917419059 60.491168004147 36.4586640965482 73.6536457890935 3511505.53960257 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2157-Mar-29 19:38 < 00:01 Earth 0.271674463590839 0.271673278388431 0.27167564879479 18.7944960996669 18.7939742578453 2508976.318314726 0.104906816927243 67.9037489443763 15.4418909425399 -30.3771255433677 1316650.17276843 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2178-Oct-21 03:51 < 00:01 Jupiter 1.540004509579 1.5400041632601 1.54000485589799 3.6307021585936 3.47591313819976 2516851.660267252 0.0770032259466142 42.8132472577371 14.20753516988 -78.1513227601148 8746780.35728793 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2180-Aug-09 03:07 < 00:01 Earth 0.283695319885964 0.283694981282772 0.283695658489156 20.8565321064304 20.8560817848336 2517509.629778780 0.039477990479051 16.8845547077844 6.80699017102722 0.116580715550067 2337216.0371464 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2190-May-29 14:41 < 00:01 Earth 0.143452222612926 0.143452082539913 0.143452362686086 11.1144250058406 11.1127537200173 2521090.111919799 0.113895649355473 11.2594635253138 3.99821548024588 -57.038276077434 3953663.74136857 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
2200-Mar-25 23:43 < 00:01 Earth 0.345622483492225 0.345622038908975 0.345622928075592 21.3151459397366 21.3147842586954 2524677.488268256 0.0742860978104495 26.0941307822735 15.4100257670616 -40.8136585384197 2422156.44211288 T 105 CATAB v2.0f-lin.ifort 2019-Dec-21 06:19:44 2019-Dec-21 06:20
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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