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6491 (1991 OA)
Classification: Amor [NEO, PHA]          SPK-ID: 2006491
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5905939780141216 5.1095e-08  
a 2.5030403809777 5.9385e-08 AU
q 1.024759805246098 1.3435e-07 AU
i 5.944509880125589 1.3506e-05 deg
node 301.9389353352129 7.5193e-05 deg
peri 323.5177079234704 7.9452e-05 deg
M 276.0609367612638 1.4064e-05 deg
tp 2457137.757664592824
(2015-Apr-25.25766459)
6.3364e-05 JED
period 1446.439292610392
3.96
5.1475e-05
1.409e-07
d
yr
n .2488870440945415 8.8573e-09 deg/d
Q 3.981320956709303 9.4457e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      175  
   data-arc span      7500 days (20.53 yr)  
   first obs. used      1991-03-18  
   last obs. used      2011-09-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53155  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 09:20:04  

Additional Information
 Earth MOID = .0431405 AU 
 T_jup = 3.192 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.8 mag n/a MPO208043  
rotation period rot_per 2.69 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Erikson, A.; Mottola, S.; Lagerros, J.S.V.; Lindgren, M.; et al. (2000) Icarus 147, 487-497.]

6491 (1991 OA)          Discovered 1991-Jul-16 by Holt, H. E. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ 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
1906-Jun-20 10:51 00:09 Earth 0.147035116343545 0.147015961470176 0.147054287966148 5.96831475856177 5.96527772158345 2417381.952089122 9.18304736509259 1441.72723668111 15.1622859457308 55.3390163279717 563038.681261508 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1943-May-25 22:31 00:04 Mars 0.0897732465284644 0.0897162132440125 0.0898303142245998 10.9358848127245 10.9355931968787 2430870.438217567 4.32880601763458 3457.92026855476 24.0375244829941 43.7769106706974 351359.545648596 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1953-Jun-30 21:48 < 00:01 Jupiter 1.80252673909699 1.80250175469416 1.80255172329005 6.22567024064802 6.14972788656923 2434559.408037889 0.33902670749097 324.206558725809 13.736943183392 -7.38513550262064 271550.368949868 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1955-May-04 16:17 00:01 Earth 0.374373157221458 0.374309250000485 0.374437064295058 15.8292082718411 15.8287586425149 2435232.178317045 1.35068094529684 3125.57907357755 31.1427252455428 11.7215398892986 298886.522790319 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1959-May-16 13:04 00:02 Earth 0.226480169742949 0.226434257962146 0.226526081006706 11.0688110832219 11.067748159615 2436705.044185961 1.98073238532783 2090.24315733265 26.8309036409396 16.7529341678199 256516.678955495 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1963-Jun-08 15:07 00:04 Earth 0.11799358456535 0.117978322735383 0.118008845815275 6.81270051260791 6.8093850788684 2438189.129729963 3.63698557648807 479.428023664044 17.6979708994874 4.87558819435508 47853.1869479123 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1965-Jul-07 16:45 < 00:01 Jupiter 1.44203752286054 1.44202775180436 1.44204729388552 4.86773765485537 4.74553600083354 2438949.197587372 0.242862927714648 102.365989931827 10.8582854718346 -11.2918290346389 353698.348609669 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1967-Jul-08 11:25 00:02 Earth 0.112429915686872 0.112412647667373 0.112447184840915 9.22151146427888 9.21894113424241 2439679.975917770 1.81555747028723 807.779260832645 19.9416115762457 34.2789103554334 302767.471799641 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1971-Jul-04 00:31 00:01 Earth 0.0925035713440086 0.0924964237764186 0.0925107199095202 8.42314559526888 8.4197252674443 2441136.521586349 1.47096097205038 418.217412732781 18.7813253968989 48.5476985718893 332975.773992616 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1971-Aug-27 14:18 < 00:01 Mars 0.0804908657996114 0.0804899643189152 0.0804917698963823 12.6681415506652 12.6678607801537 2441191.095533645 0.689975476665876 763.298840287801 22.8248581290876 88.195115055578 490267.167322695 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1975-Jul-05 07:02 < 00:01 Earth 0.0988223979883462 0.0988168436598769 0.0988279526781091 8.58667007634154 8.58352948360785 2442598.792958774 0.92713732015154 297.268823919599 19.1127894047739 43.6668588427985 326430.109122081 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1977-Jul-03 09:35 < 00:01 Jupiter 1.26812895028636 1.26812529635053 1.26813260421588 4.33616169271683 4.17928659198287 2443327.899593018 0.224722052558447 30.1244782823261 9.67151939191476 -19.6924097245083 640304.97219646 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1979-Jul-20 02:39 < 00:01 Earth 0.154752292745563 0.154744318725035 0.154760266743625 11.8845099532405 11.8830611131351 2444074.610075201 0.403009070361022 350.877640017147 21.4065049685834 16.9119065092013 233793.857711623 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1983-Jul-06 17:10 < 00:01 Earth 0.0738694578738744 0.0738677912265895 0.0738711246053691 8.8453337463074 8.84125493734792 2445522.215034413 0.396253623428853 108.680681257107 18.6896498104717 54.3054429018665 300529.62507903 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1987-Jun-22 03:52 < 00:01 Earth 0.0715009146799088 0.0715001200432919 0.071501709319077 7.63084251223583 7.6259574814854 2446968.660906477 0.2026172645897 23.1586112923879 10.9066315254391 -31.1029513256534 362711.390583528 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1989-Jun-18 22:32 < 00:01 Jupiter 1.18537098130132 1.18536943365985 1.18537252894146 4.10900595388547 3.93125978171418 2447696.438756187 0.34292963529878 10.6154535859281 7.43031540263333 -73.5354402592358 1602254.20515264 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1991-Jul-04 22:56 < 00:01 Earth 0.0574918269938718 0.0574913019039686 0.0574923520853763 8.68696942134313 8.68163273872972 2448442.455879599 0.0596248375761215 19.8039780197013 10.7360266065703 -45.5297171785306 397694.346044835 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1995-May-27 01:43 < 00:01 Earth 0.105487489181386 0.105486533150789 0.105488445211093 9.05437754342725 9.05158744373725 2449864.571584539 0.0890830668811487 32.2370728484241 18.3186809490635 8.51694103087425 315541.570595792 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
1999-May-05 09:37 < 00:01 Earth 0.244270588854803 0.244269041064328 0.24427213664425 14.2808123217459 14.2800484861727 2451303.900352295 0.081983985312969 69.3145625571489 28.3208651627689 10.0561145344494 446024.649568339 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2001-May-23 07:27 < 00:01 Jupiter 1.16190016834343 1.16189908502359 1.16190125166343 4.00952596761776 3.82338896065524 2452052.810634142 0.405408818561787 9.69545359773717 4.17940223512529 80.1900027607975 2748660.71223777 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2003-May-03 18:29 < 00:01 Earth 0.257616638760199 0.257614714555536 0.257618562963507 15.0201192030222 15.0194305903297 2452763.269977898 0.0715340412480085 87.6455141252262 28.8067258359266 10.7584154325379 400617.920673123 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2013-Apr-17 16:48 < 00:01 Jupiter 1.16014602061264 1.16014506755678 1.16014697366787 3.99078240791693 3.80343849550802 2456400.199683220 0.359658686940876 10.1685462832856 4.83210167516648 86.6194208262273 2387991.42634559 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2025-Mar-10 19:44 < 00:01 Jupiter 1.16072507359703 1.16072415961343 1.16072598758127 4.00393173604227 3.81732864201564 2460745.322089860 0.319474801639823 13.0649723490949 6.80084430222822 -69.1370092611488 1624354.07408092 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2037-Jan-30 07:56 < 00:01 Jupiter 1.15882387497976 1.15882270050286 1.15882504947478 4.03547257821039 3.85008741387587 2465088.830722662 0.8008981937805 23.3076794708673 7.81603448576998 -50.5647665138338 1194786.55561268 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2048-Dec-20 06:10 00:02 Jupiter 1.15461463850066 1.15461231293411 1.15461696416462 4.09283537904524 3.90948925828064 2469430.756620853 1.88144322053342 48.2540078713918 8.30209056151796 -42.2171641274141 968974.346114591 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2060-Nov-05 00:48 00:04 Jupiter 1.15671631181939 1.15671047858664 1.1567221454567 4.15308897868233 3.97286026401494 2473768.533466578 3.91633885218274 105.33966826899 8.60048703396983 -36.8774264447483 838260.111526081 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2072-Sep-15 20:22 00:07 Jupiter 1.16895974563449 1.16894281055065 1.16897668221721 4.25180847904747 4.07782848118039 2478101.348375409 7.20921892358755 249.445286349256 8.90457580298 -30.2572838800875 699326.621216919 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2082-Aug-22 08:38 00:08 Earth 0.413772794744324 0.413342350591205 0.414203221500849 21.7739070252972 21.7736112805707 2481728.859758104 8.28743997803082 20938.2484757032 15.7327906176536 -4.25610490374424 259538.227027522 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2084-Jul-21 01:38 00:11 Jupiter 1.20819792372296 1.20814642673112 1.20824942475112 4.48533104786321 4.32620725120035 2482427.568187369 10.8285084179269 642.117224316452 9.30610413806448 -22.3085280831427 547395.642353925 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2086-Aug-01 01:21 00:26 Earth 0.0902243443002118 0.0897387012667776 0.0907097511335421 12.8439227220463 12.8416232410938 2483168.556518678 25.7525269714594 19781.4710777734 15.1514030027372 -7.6952536486461 89688.6459474013 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2090-May-06 09:31 00:16 Earth 0.213429850624848 0.213062679486846 0.213797150933114 15.2819904073915 15.2811734697977 2484542.896506486 16.2479286362578 18866.5770280168 33.527266047263 26.133097132307 338743.852606402 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2096-May-16 12:15 < 00:01 Jupiter 1.30760021078786 1.30756923597806 1.30763119080993 5.005434629201 4.87430388729326 2486745.010729936 0.450186681624713 599.4843864186 9.97457780945328 -16.3036686723375 455539.854992815 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2108-Feb-25 23:42 00:05 Jupiter 1.56994440094916 1.56991385216315 1.56997494976272 6.17846771688253 6.09051849529421 2491046.487608678 4.81614497065392 158.872033813233 10.9630687503433 -12.2676531382564 487485.313938641 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2121-Aug-14 10:47 00:08 Earth 0.116795432815619 0.116646541469383 0.116944338517005 15.3498192590891 15.3483329666905 2495964.949357106 8.11640538854221 6995.7014393082 20.0847027843607 -21.5299305290413 258057.228556748 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2125-Apr-10 22:21 00:04 Earth 0.48591699809095 0.485671204565075 0.4861627990424 25.8839325482226 25.8837207014837 2497300.431595081 3.86910162180498 12525.5667390564 43.2998558387919 15.0552473512351 400417.935770565 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2144-Aug-21 04:25 00:14 Earth 0.169069170082642 0.168712509572556 0.1694258626843 17.3824683417347 17.3815616747214 2504372.684077638 14.1681197251305 17121.5070008684 14.2595305427022 -18.7243586250085 478918.103732054 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2167-Jun-24 00:53 00:37 Earth 0.115998516420932 0.115977858904673 0.116019352272817 11.4217884923442 11.4197772516532 2512714.536722410 37.3191037770483 5193.83734240643 15.5736126123538 81.5576268722167 788581.897170745 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
2190-May-25 14:14 00:12 Earth 0.108317577776672 0.10830788505334 0.108327416007595 11.7163555751995 11.7142558629068 2521086.093258044 11.9397905673615 4585.71888544995 44.096584056515 85.6217580024415 265370.84861671 T 21 CATAB v2.0c-linF95 2013-Aug-05 09:20:08 2013-Aug-05 09:20
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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