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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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5904451983626335 4.747e-08  
a 2.50103488029066 5.6064e-08 AU
q 1.024310844285576 1.2742e-07 AU
i 5.943828116135625 1.274e-05 deg
node 301.9367807315558 8.3177e-05 deg
peri 323.5755934341508 8.8272e-05 deg
M 325.7712928051499 1.4985e-05 deg
tp 2457137.861822799040
(2015-Apr-25.36182280)
6.2447e-05 JED
period 1444.701254013305
3.96
4.8577e-05
1.33e-07
d
yr
n .2491864660599821 8.3787e-09 deg/d
Q 3.977758916295744 8.9167e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      176  
   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      .54024  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 18:47:37  

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 18.8 mag n/a MPO208043  
rotation period rot_per 2.69 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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 10:52 00:11 Earth 0.147035801777387 0.147012497002011 0.147059131094951 5.96836588522622 5.96532888843842 2417381.952522397 11.1304292674003 1747.15261383246 15.2449286990123 55.3063043031303 559766.878735207 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1943-May-25 22:32 00:05 Mars 0.0897711826178396 0.0897028738681664 0.0898395407255588 10.935928396974 10.9356367755859 2430870.438545755 5.18151882765739 4141.89981396586 26.4624463317653 43.7743390731042 319138.861323937 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1953-Jun-30 21:48 < 00:01 Jupiter 1.80252590012089 1.80249705083392 1.80255474914621 6.22566595548787 6.1497235129268 2434559.408050629 0.384031264654349 379.414100061663 14.0376959683893 -7.40677127992563 263272.716705699 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1955-May-04 16:17 00:02 Earth 0.374370886082052 0.374294756961531 0.374447015001651 15.8291376728212 15.8286880387618 2435232.178473085 1.62646615739536 3724.29287843899 30.5648315995378 11.7473176304547 305081.937624134 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1959-May-16 13:04 00:02 Earth 0.226478520198765 0.226423827092888 0.226533212579997 11.0687533830286 11.0676904461381 2436705.044366101 2.38409519038468 2491.38550380083 26.4752925126122 16.7724531043893 260179.181204421 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1963-Jun-08 15:07 00:04 Earth 0.117993001084428 0.117974870276707 0.118011131062827 6.81268305556855 6.80936759693032 2438189.129982442 4.37036304199983 570.917051693892 17.9266701019842 4.69554598405215 44683.1156467866 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1965-Jul-07 16:45 < 00:01 Jupiter 1.44203718868013 1.44202630121399 1.44204807611796 4.86773595535259 4.74553422888319 2438949.197597553 0.26005726565558 117.947341200779 11.0406882461367 -11.3102051382737 339443.368021503 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1967-Jul-08 11:25 00:02 Earth 0.112430539239011 0.112409694195077 0.112451385909434 9.22153776328722 9.21896745484043 2439679.976037958 2.17471897039152 971.914797757121 20.9124867417937 34.1727100567603 287882.67577744 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1971-Jul-04 00:31 00:02 Earth 0.0925038116494338 0.0924950458430395 0.0925125789166908 8.42315993369881 8.41973962058598 2441136.521679181 1.77461922132268 508.146730171051 19.5326345507293 48.3352701437888 319053.159324199 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1971-Aug-27 14:18 < 00:01 Mars 0.0804908344955043 0.0804897651991301 0.0804919079175825 12.6681511216186 12.66787035121 2441191.095587638 0.834940023226401 927.173592092769 24.5772803863477 88.1665333211229 455302.493220651 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1975-Jul-05 07:02 00:01 Earth 0.0988225887393239 0.098815652042933 0.0988295259801058 8.58667966974896 8.58353908658854 2442598.793013934 1.13243947203981 367.097537292822 19.9112892534587 43.3801852496827 311498.806595474 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1977-Jul-03 09:35 < 00:01 Jupiter 1.26812880052097 1.26812500648519 1.26813259455086 4.33616087586829 4.17928572559823 2443327.899571349 0.209221701389475 33.7413838336027 9.79948606139505 -19.7125315420002 605734.366063107 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1979-Jul-20 02:39 < 00:01 Earth 0.154752601376496 0.154742697511916 0.154762505204437 11.8845186842933 11.8830698481421 2444074.610101385 0.491541387786731 433.890624801887 22.8401548321104 16.6694797937232 215088.058613667 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1983-Jul-06 17:10 < 00:01 Earth 0.0738694914562453 0.0738673151788162 0.0738716678753469 8.84533624448264 8.8412574385304 2445522.215054386 0.493106536143889 138.737484615949 19.4836510696673 53.4806444925818 284640.682193091 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1987-Jun-22 03:52 < 00:01 Earth 0.0715008356765232 0.0714999994111869 0.0715016719471902 7.63084188123102 7.62595684467704 2446968.660911225 0.269728825902125 26.9295585296562 11.0614395310366 -41.2078012515101 397115.666480923 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1989-Jun-18 22:32 < 00:01 Jupiter 1.18537088183583 1.18536944351363 1.18537232015688 4.10900558901976 3.93125938509959 2447696.438737556 0.33402823540457 11.0457893776561 7.38276684514196 -71.9154984671054 1602123.34864772 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1991-Jul-04 22:56 < 00:01 Earth 0.0574917884931622 0.0574912485802804 0.057492328407111 8.68696872162892 8.68163203501046 2448442.455877746 0.0717780060682094 21.1132889202866 14.345426092634 -55.8665237424015 335570.148397036 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1995-May-27 01:43 < 00:01 Earth 0.105487393310558 0.105486480905196 0.105488305714989 9.05437661009967 9.05158650758584 2449864.571586394 0.0824881337562693 30.4421708102319 16.9525927263946 2.73828147961526 327553.123686533 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
1999-May-05 09:37 < 00:01 Earth 0.244270554820457 0.244269031025669 0.244272078614107 14.28081202103 14.2800481853343 2451303.900355014 0.0804276419021768 68.1960670467399 27.438572840181 9.73488552005683 452527.729859381 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2001-May-23 07:27 < 00:01 Jupiter 1.16190006871729 1.16189904728062 1.16190109015418 4.00952562218393 3.82338858205573 2452052.810604755 0.403228203937482 9.93601749379377 3.97860999943632 81.285305938053 2893846.64428344 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2003-May-03 18:29 < 00:01 Earth 0.257616598480852 0.257614629252312 0.257618567708043 15.0201190905981 15.0194304777928 2452763.269978297 0.073675224264647 89.877359839489 28.0803306115488 11.2273634637967 400065.018150627 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2013-Apr-17 16:47 < 00:01 Jupiter 1.16014592584502 1.16014503455852 1.16014681713099 3.99078208237628 3.80343813825213 2456400.199643996 0.366255398987927 10.386126859022 4.51679429755387 86.5348338688211 2554342.67611032 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2025-Mar-10 19:44 < 00:01 Jupiter 1.16072498478725 1.16072416272404 1.16072580684364 4.00393148111002 3.81732835999509 2460745.322050124 0.318865994778523 13.0238125423707 6.48943580344455 -71.9935913273141 1721619.72658465 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2037-Jan-30 07:56 < 00:01 Jupiter 1.15882379823401 1.15882275125417 1.15882484523063 4.0354724161603 3.85008723144978 2465088.830666200 0.752321097766207 22.5010852921149 7.70404846942229 -52.3329570929706 1238923.9488257 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2048-Dec-20 06:09 00:02 Jupiter 1.15461459184733 1.1546124606976 1.15461672309147 4.09283545391295 3.90948932907748 2469430.756535810 1.77209322346818 46.0648276079378 8.29982251341679 -42.959131528151 983825.298302191 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2060-Nov-05 00:48 00:04 Jupiter 1.15671634710254 1.15671088733463 1.15672180724432 4.15308962638664 3.97286094672452 2473768.533333116 3.70272330653806 100.211074577984 8.65980587750097 -37.2019841937867 839324.319945822 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2072-Sep-15 20:21 00:07 Jupiter 1.16896003321582 1.16894402608938 1.16897604171462 4.25181050990583 4.07783064239967 2478101.348137327 6.83000674939324 237.018520116675 9.0245070462745 -30.3984424573333 693144.097857255 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2082-Aug-22 08:37 00:08 Earth 0.413763201240642 0.413354600306226 0.41417178649991 21.7736360932303 21.7733403379665 2481728.859241286 7.8633000188013 19875.6678948081 17.0789926155395 -4.26039051651684 239319.110138247 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2084-Jul-21 01:38 00:10 Jupiter 1.2081989926221 1.20815014268628 1.20824784622979 4.48533668043698 4.32621323431393 2482427.567772460 10.2691243630432 609.980574121975 9.50228112896583 -22.3680161668655 537522.194771302 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2086-Aug-01 01:20 00:24 Earth 0.0902135196611207 0.0897524455889735 0.0906743808946068 12.8436193942286 12.8413195830156 2483168.555301202 24.4464856534595 18780.8110964366 16.1509481791399 -7.70089332069604 84188.9489789606 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2090-May-06 09:30 00:15 Earth 0.213437969884559 0.213089430679392 0.213786625559496 15.2822861040657 15.2814692133564 2484542.895629014 15.427525330651 17910.2502879552 32.8118289666863 26.1369118152884 346192.547743672 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2096-May-16 12:15 < 00:01 Jupiter 1.30760085455681 1.30757142130922 1.30763029252847 5.00544233141078 4.87431186213874 2486745.010601487 0.439987166252088 570.057288073568 10.2610559409781 -16.3754630888447 444867.206731564 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2108-Feb-25 23:42 00:05 Jupiter 1.56994429198041 1.56991474523514 1.56997383875279 6.17847257955083 6.09052342203252 2491046.487717614 4.57839111356868 153.844494222342 11.3420224328978 -12.5840257753051 485185.971611552 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2121-Aug-14 10:48 00:08 Earth 0.116798213732612 0.116657723238927 0.11693871694157 15.3499182713466 15.3484320239255 2495964.949705048 7.66899177240525 6600.45135302546 21.8190758636856 -21.5101261077786 237344.417870044 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2125-Apr-10 22:22 00:04 Earth 0.485911997516577 0.485679440845717 0.486144560814771 25.8837954999135 25.8835836498727 2497300.431812962 3.6558067907356 11849.9699829544 42.0779555583177 15.0453004291009 411776.956314408 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2144-Aug-21 04:26 00:13 Earth 0.169076618968977 0.168738680995707 0.16941458569998 17.3827092303513 17.381802615848 2504372.684752282 13.4305616615939 16222.5007728424 14.4173411658873 -18.7192695305646 473574.671484557 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2167-Jun-24 00:55 00:35 Earth 0.115998048568269 0.115978434570356 0.116017823674712 11.4218017146033 11.4197904681284 2512714.538201068 35.4565249548828 4936.30560244505 13.7992977580444 81.5694980982704 890002.086636638 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
2190-May-25 14:15 00:11 Earth 0.108317521408569 0.10830812107408 0.108327054868327 11.7163101759811 11.7142104544581 2521086.093910494 11.4425252913331 4390.06041522316 44.8280146862837 85.5698440324785 261022.127134873 T 22 CATAB v2.0c-linF95 2014-Jun-09 18:47:39 2014-Jun-09 18:47
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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