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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5904451936566505 4.4123e-08  
a 2.501034851362106 3.8509e-08 AU
q 1.024310844207575 1.1643e-07 AU
i 5.943828047806064 1.2016e-05 deg
node 301.9367848682712 8.2409e-05 deg
peri 323.575596478208 8.5815e-05 deg
M 325.7713024722121 1.0225e-05 deg
tp 2457137.861781621328
(2015-Apr-25.36178162)
4.1267e-05 JED
period 1444.70122894781
3.96
3.3366e-05
9.135e-08
d
yr
n .249186470383355 5.7551e-09 deg/d
Q 3.977758858516637 6.1246e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      184  
   data-arc span      8895 days (24.35 yr)  
   first obs. used      1991-03-18  
   last obs. used      2015-07-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53616  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-27 06:17:38  

Additional Information
 Earth MOID = .0439208 AU 
 T_jup = 3.194 
[ 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 18.9 mag n/a MPO324368  
rotation period rot_per 2.69 h n/a LCDB (Rev. 2015-July); Warner et al., 2009 [Result based on less than full coverage, so that the period may be wrong by 30 percent or so.]

6491 (1991 OA)          Discovered 1991-Jul-16 by Holt, H. E. at Palomar
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 00:10 Earth 0.147035421354427 0.147013609254435 0.147057255021248 5.96833287511135 5.96529585365811 2417381.952257785 10.4273692987537 1636.96635502377 14.6339294888725 55.3438756127851 583399.663651988 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1943-May-25 22:31 00:05 Mars 0.0897727447744557 0.0897089515412025 0.0898365811155518 10.9358933870868 10.9356017698397 2430870.438292666 4.84192966781989 3869.52199355691 25.9433011966054 43.7976626296838 325669.616776201 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1953-Jun-30 21:47 < 00:01 Jupiter 1.80252701267673 1.80250036008219 1.80255366505255 6.2256694195049 6.14972706688326 2434559.407986082 0.364015482687712 351.733748391494 13.507373709265 -7.23630379073828 268570.293140225 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1955-May-04 16:17 00:02 Earth 0.374372796022723 0.374301688428379 0.374443903437018 15.829192431581 15.828742801371 2435232.178371890 1.52260692210736 3478.14860476084 29.2401277316484 11.7188736732624 318157.090581394 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1959-May-16 13:04 00:02 Earth 0.226479888946178 0.226428777663855 0.226530999587049 11.0687971118739 11.0677341856074 2436705.044246303 2.23201023791221 2327.60560618199 25.3633728161664 16.7336170281155 270985.640892603 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1963-Jun-08 15:07 00:04 Earth 0.117993468283588 0.117976496114271 0.11801043972467 6.81269437892396 6.80937893892987 2438189.129799554 4.0906613270869 534.328341093791 16.9246044211152 4.5500343574913 46103.1397126091 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1965-Jul-07 16:44 < 00:01 Jupiter 1.4420377740507 1.44202782552313 1.44204772255571 4.86773735684614 4.74553571671082 2438949.197562630 0.252570631044662 108.596272551582 10.6016388112418 -10.8493039275642 344801.183654328 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1967-Jul-08 11:25 00:02 Earth 0.112430126125607 0.112410629466992 0.112449624219624 9.22151515203676 9.2189448278401 2439679.975940080 2.03424762584097 909.688306602826 20.3078538605977 34.2518612667409 297066.437783207 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1971-Jul-04 00:31 00:02 Earth 0.0925036927272347 0.092495491220967 0.092511895525558 8.42314739946481 8.41972707686222 2441136.521608087 1.66213895084257 476.597784372587 18.9240449241245 48.4738348548661 330032.464210606 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1971-Aug-27 14:18 < 00:01 Mars 0.0804908503139886 0.08048985885936 0.0804918452639437 12.6681437160465 12.6678629455289 2441191.095555148 0.783629877094042 867.918787676278 24.1067245425949 88.2345670335009 464207.237370433 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1975-Jul-05 07:02 00:01 Earth 0.098822546742076 0.0988160347901237 0.0988290591814813 8.58667241186567 8.58353182471478 2442598.792980794 1.06452490472497 345.604542132885 19.3129685773128 43.5746123480278 322326.351698575 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1977-Jul-03 09:35 < 00:01 Jupiter 1.26812911843609 1.26812572148547 1.26813251538255 4.33616147664058 4.17928638898743 2443327.899585666 0.195291768382246 30.4920646014162 9.44424587400287 -18.1882809459782 621191.847432396 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1979-Jul-20 02:39 < 00:01 Earth 0.15475251539803 0.154743197641173 0.154761833124015 11.8845125443966 11.8830637066918 2444074.610085218 0.463494090653375 408.467678393033 22.3070519544969 16.8542657381197 222774.09277535 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1983-Jul-06 17:10 < 00:01 Earth 0.0738695233385708 0.0738674901016973 0.0738715567039788 8.84533353015214 8.8412547247085 2445522.215045489 0.465676916145358 131.197280265438 18.8957458516126 54.0035309682197 295489.658946711 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1987-Jun-22 03:52 < 00:01 Earth 0.0715008628633642 0.0715000377622022 0.0715016879700875 7.63084064000703 7.62595560451599 2446968.660923123 0.258448862958389 26.5271445577662 9.20554298851468 -39.6159405999918 453359.993877698 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1989-Jun-18 22:32 < 00:01 Jupiter 1.18537107364342 1.18536982755328 1.18537231973235 4.10900572208554 3.93125955359347 2447696.438753025 0.295001539792445 9.75479591672801 6.81926917970102 -82.5323246150616 1775099.48816189 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1991-Jul-04 22:56 < 00:01 Earth 0.0574918235232922 0.0574913112370351 0.0574923358109296 8.68696792628277 8.68163124242808 2448442.455883339 0.0709543127442435 20.7000268110593 13.059944517625 -55.7193022701749 363799.977105584 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1995-May-27 01:43 < 00:01 Earth 0.105487424246492 0.105486567661567 0.105488280830697 9.05437597626342 9.05158587437258 2449864.571596207 0.0736692399094704 28.5386024319873 16.0786140696664 1.92404221676647 348940.679946767 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
1999-May-05 09:37 < 00:01 Earth 0.244270617075046 0.244269238200021 0.244271995949256 14.2808118589715 14.2800480234618 2451303.900367005 0.0714033068610042 61.878060469032 26.5848778119744 10.4115110103381 497921.152122394 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2001-May-23 07:27 < 00:01 Jupiter 1.1619002016968 1.1618992905406 1.16190111285657 4.00952568212382 3.82338866673567 2452052.810623053 0.359430328628521 9.15407415800776 3.18343739843548 76.6493395428648 3565151.91158324 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2003-May-03 18:29 < 00:01 Earth 0.257616765644684 0.257615003746312 0.257618527542054 15.0201232913277 15.0194346791619 2452763.269977783 0.0688384046427272 80.3369614751585 27.0567793489288 11.1387604859109 437742.052955131 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2013-Apr-17 16:47 < 00:01 Jupiter 1.16014604573714 1.16014524551518 1.16014684595966 3.99078229953921 3.80343838594909 2456400.199645666 0.343903526231256 9.36258570260622 3.45932862016555 79.7139080531086 3293595.46346879 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2025-Mar-10 19:44 < 00:01 Jupiter 1.16072512069587 1.16072441584999 1.1607258255415 4.00393210705251 3.81732903891892 2460745.322004937 0.281104886770242 10.6254359740552 5.39679508591866 -84.3113303076689 2141282.14423566 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2037-Jan-30 07:56 < 00:01 Jupiter 1.1588239975887 1.15882321288911 1.15882478229507 4.03547384908188 3.85008876602778 2465088.830502341 0.500629289676353 16.3862697773815 7.16218839994365 -57.8308604549183 1429592.92955257 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2048-Dec-20 06:09 00:01 Jupiter 1.1546149835091 1.15461348251148 1.15461648455176 4.09283883924686 3.90949293682759 2469430.756184038 1.19626519463451 32.6911835991642 7.93556107184948 -44.4580157404766 1070019.60665992 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2060-Nov-05 00:47 00:03 Jupiter 1.15671729253995 1.15671346161965 1.15672112364367 4.15309712636432 3.97286893758783 2473768.532589558 2.55459254914563 70.8272797385117 8.33256972476381 -37.7075127432056 887008.358941952 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2072-Sep-15 20:19 00:05 Jupiter 1.1689627133523 1.16895143048915 1.16897399690141 4.25182806026948 4.07784934894235 2478101.346661271 4.76591563766511 167.432377666971 8.70418203838588 -30.5912130748485 724116.538779367 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2082-Aug-22 08:32 00:06 Earth 0.413695591042882 0.413407710600584 0.413983463699717 21.7717270137123 21.7714311841748 2481728.855567064 5.53516852442301 14003.2819881336 16.7665515533049 -4.26389870380915 243950.349271851 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2084-Jul-21 01:34 00:07 Jupiter 1.20820706274585 1.20817254254067 1.20824158478876 4.48538017845856 4.32625941461748 2482427.565115119 7.20458198182051 431.061039997329 9.17879220885184 -22.4444408558611 558654.612031909 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2086-Aug-01 01:07 00:17 Earth 0.0901373734460876 0.0898122962866312 0.0904623447992419 12.8414911024374 12.8391889666657 2483168.546696515 17.2369400908306 13240.9323626289 15.4973179035042 -7.70888722409219 87751.51004853 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2090-May-06 09:21 00:11 Earth 0.21349554252965 0.213249804472538 0.213741338472479 15.2843586988034 15.2835421391366 2484542.889510285 10.8766455957896 12627.8652039344 31.6113123914095 26.1354786259356 359437.799920453 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2096-May-16 12:14 < 00:01 Jupiter 1.30760560331313 1.30758465450796 1.30762655447684 5.00549850953513 4.87437003418828 2486745.009836568 0.357505129673757 404.044606460084 9.94082211541485 -16.4633127072983 462391.541522482 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2108-Feb-25 23:44 00:03 Jupiter 1.56994298900154 1.56992117305426 1.56996480496444 6.17850691799582 6.09055818281284 2491046.488721041 3.24842240131933 113.757692822967 11.0601335972566 -12.9807421139832 529218.103662258 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2121-Aug-14 10:52 00:05 Earth 0.116822881804284 0.116725043427436 0.116920726295578 15.3507749698368 15.349289119199 2495964.952605516 5.35553383970175 4596.13975176978 19.6478323613396 -21.4782247272406 263267.042105362 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2125-Apr-10 22:24 00:03 Earth 0.485872143557244 0.485709302340941 0.48603498801168 25.8826728561311 25.8824609795234 2497300.433652376 2.55514974324796 8296.6413049751 40.2625471248234 15.0378059590837 430128.623911461 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2144-Aug-21 04:33 00:09 Earth 0.16913339014816 0.168895787224684 0.169371007243619 17.3845352662706 17.3836290512908 2504372.689791897 9.44932742163671 11405.8774577277 13.8474748722465 -18.710761318623 493029.649483086 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2167-Jun-24 01:10 00:25 Earth 0.115994834791278 0.115980906302113 0.116008843975531 11.4219020539558 11.419890769424 2512714.548607927 25.0930105371964 3494.07444564049 13.47728732237 81.55832788969 911219.105599236 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
2190-May-25 14:21 00:08 Earth 0.108318050210431 0.108311068219286 0.108325100713799 11.7160664235969 11.7139666686332 2521086.097624551 8.26675944336888 3160.52279499656 39.0725944933252 85.4543272156869 299422.008229234 T 25 CATAB v2.0c-linF95 2015-Jul-27 06:17:46 2015-Jul-27 06:17
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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