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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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .590445192658584 4.6996e-08  
a 2.501034852428154 4.5982e-08 AU
q 1.024310847140379 1.2701e-07 AU
i 5.943828938921804 1.2361e-05 deg
node 301.9367838573396 8.2994e-05 deg
peri 323.5755970811449 8.7903e-05 deg
M 325.7713024956857 1.033e-05 deg
tp 2457137.861781614951
(2015-Apr-25.36178161)
4.2023e-05 JED
period 1444.7012298715
3.96
3.9842e-05
1.091e-07
d
yr
n .2491864702240342 6.872e-09 deg/d
Q 3.977758857715929 7.3132e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      180  
   data-arc span      8714 days (23.86 yr)  
   first obs. used      1991-03-18  
   last obs. used      2015-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5405  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:17:01  

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-Feb); 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:
[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
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 00:11 Earth 0.147035529255915 0.147012256956836 0.147058826023125 5.96834126329901 5.96530424834558 2417381.952329200 11.113552310865 1744.51091325568 14.9685319958538 55.3089625854528 570118.169187823 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1943-May-25 22:31 00:05 Mars 0.0897724479844632 0.0897043067654113 0.0898406383204192 10.9359000040944 10.9356083860597 2430870.438340530 5.16856403725264 4131.80172891581 26.4266839205823 43.7749497780587 319578.676412867 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1953-Jun-30 21:48 < 00:01 Jupiter 1.80252689005701 1.80249824671697 1.80255553314363 6.22566899743009 6.1497266343983 2434559.408001996 0.381450142723417 377.410462928873 13.7997100660303 -7.38970402466568 266993.222885424 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1955-May-04 16:17 00:02 Earth 0.374372465459418 0.374296561926751 0.37444836879251 15.8291822732467 15.8287326423511 2435232.178393402 1.6233391526869 3713.2968692209 29.8538057122649 11.7461406881241 312309.028312357 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1959-May-16 13:04 00:02 Earth 0.226479654049401 0.226425121448152 0.226534185929968 11.0687886667754 11.0677257385953 2436705.044273250 2.37938524373418 2484.1321180494 25.891584098391 16.7694604327502 265994.127917504 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1963-Jun-08 15:07 00:04 Earth 0.117993394597468 0.11797531900306 0.118011469366505 6.81269201825177 6.80937657503731 2438189.129838306 4.36091309086912 569.29498138528 17.2717674139043 4.66355464054654 45900.1333039988 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1965-Jul-07 16:45 < 00:01 Jupiter 1.44203773264888 1.44202699280712 1.44204847246371 4.86773720314204 4.74553555549505 2438949.197570201 0.257839714779781 117.01433807056 10.8394651934123 -11.2553822914647 343714.372416724 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1967-Jul-08 11:25 00:02 Earth 0.112430218689623 0.112409412401743 0.11245102659742 9.22151943795493 9.21894911706966 2439679.975959363 2.1692597255399 969.9396344319 20.649941264261 34.1723840240692 291536.151991459 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1971-Jul-04 00:31 00:02 Earth 0.0925037341971153 0.0924949773663569 0.0925124924855528 8.42315009361343 8.41972977363892 2441136.521625213 1.77109359006638 507.477376137613 19.2444862952314 48.3350172748892 323823.50223218 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1971-Aug-27 14:18 < 00:01 Mars 0.0804908548121078 0.0804897874605447 0.0804919262780293 12.6681453609012 12.6678645904358 2441191.095562024 0.833609240853725 925.869028791067 24.5256117730279 88.1666945728629 456261.816439692 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1975-Jul-05 07:02 00:01 Earth 0.0988225801949726 0.0988156468462821 0.0988295140878543 8.58667435656063 8.58353377118461 2442598.792991219 1.13105425914007 366.897130991959 19.6305107950276 43.3857246325889 315972.230100647 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1977-Jul-03 09:35 < 00:01 Jupiter 1.2681291101187 1.26812543619641 1.2681327840372 4.33616145839825 4.17928636901213 2443327.899590069 0.200877659678791 33.2407194872418 9.62150336143585 -19.5080388642478 612695.011472346 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1979-Jul-20 02:39 < 00:01 Earth 0.15475256043815 0.154742661365401 0.154762459474356 11.8845142066294 11.883065369549 2444074.610089937 0.490933728218464 433.643418888203 22.6334574619963 16.6744528452023 217058.058862595 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1983-Jul-06 17:10 < 00:01 Earth 0.0738695360764967 0.073867365927129 0.0738717063685923 8.84533437560804 8.84125557125795 2445522.215049889 0.492699895369986 138.674017200636 19.203673699093 53.5222865175362 288898.823576652 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1987-Jun-22 03:52 < 00:01 Earth 0.0715008658995439 0.0715000373338331 0.0715016944709045 7.63084088262775 7.62595584749963 2446968.660926988 0.268415583029031 26.6405698020068 9.25191835784873 -39.7494416709554 452088.841425912 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1989-Jun-18 22:32 < 00:01 Jupiter 1.18537107846319 1.18536977581071 1.1853723811146 4.10900572976517 3.93125956235939 2447696.438752775 0.320916837715459 10.6607801688841 7.1212830874641 -74.2334325176158 1671850.45869229 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1991-Jul-04 22:56 < 00:01 Earth 0.0574918272739844 0.057491304575554 0.0574923499737138 8.68696812886779 8.6816314454859 2448442.455884144 0.0710497231997117 20.8536505118049 13.3360111414619 -54.2311351692694 353845.59040721 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1995-May-27 01:43 < 00:01 Earth 0.105487437135602 0.10548654616746 0.105488328102787 9.05437612445727 9.05158602295308 2449864.571595808 0.0809594159747706 29.7664068352897 16.1242164796148 1.99180309927922 334628.321492813 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
1999-May-05 09:37 < 00:01 Earth 0.244270632239952 0.244269133808693 0.24427213067012 14.2808121183127 14.2800482828643 2451303.900366468 0.0785464851377924 67.1726826389805 26.8309062642378 10.0019424625804 461592.491948553 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2001-May-23 07:27 < 00:01 Jupiter 1.16190021016919 1.16189929837292 1.16190112196416 4.00952573389428 3.82338872241683 2452052.810629157 0.391617568104931 9.6559698062805 3.54383273789884 79.8129086409467 3235874.97936958 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2003-May-03 18:29 < 00:01 Earth 0.257616784745644 0.257614915342859 0.257618654147284 15.0201236554261 15.0194350433279 2452763.269976873 0.0735815954013404 85.0100922891494 27.3039143481501 10.8048885763618 415880.820050035 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2013-Apr-17 16:47 < 00:01 Jupiter 1.16014605419345 1.16014527186336 1.1601468365235 3.99078230919453 3.80343839747919 2456400.199642130 0.36329498380138 9.98137611671354 3.86954637055186 83.6011738205379 2970166.70599655 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2025-Mar-10 19:44 < 00:01 Jupiter 1.16072512819733 1.16072445201709 1.16072580437834 4.00393211546747 3.81732904898066 2460745.322006215 0.283888791591784 11.8846988390332 5.7710596828439 -78.2575831821532 1977577.19652296 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2037-Jan-30 07:56 < 00:01 Jupiter 1.1588240025507 1.15882319030933 1.15882481480215 4.03547385803229 3.85008877622207 2465088.830516435 0.580843936517276 19.30327302766 7.26350187699543 -55.7981644230359 1370499.37704451 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2048-Dec-20 06:09 00:01 Jupiter 1.1546149811448 1.1546132865151 1.15461667584252 4.09283876366143 3.90949285731315 2469430.756198929 1.4224883579825 38.7805748660403 7.97727518215098 -44.2720089059355 1052368.13221506 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2060-Nov-05 00:47 00:03 Jupiter 1.15671726981386 1.15671279803019 1.1567217418663 4.153096883004 3.97286867956626 2473768.532612673 3.03671053836028 83.9807027540136 8.36979732083132 -37.7492645734146 880998.369543642 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2072-Sep-15 20:19 00:06 Jupiter 1.16896262731831 1.16894932064748 1.16897593496509 4.25182747404577 4.07784872463006 2478101.346715020 5.65673368588447 198.409506860652 8.73969303658381 -30.6309612941062 721223.887365116 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2082-Aug-22 08:32 00:07 Earth 0.41369801452074 0.413356764473466 0.414039253627849 21.7717953024941 21.7714994756174 2481728.855697617 6.56016705629634 16599.2090039979 16.8620903043296 -4.26559486771432 242657.389985665 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2084-Jul-21 01:34 00:09 Jupiter 1.20820677980082 1.20816594498084 1.20824761721788 4.48537865634648 4.32625779857262 2482427.565212073 8.54306803926327 510.677978519957 9.21055468404471 -22.4639540790713 556977.580601028 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2086-Aug-01 01:08 00:20 Earth 0.0901401120542064 0.0897548184679555 0.0905252570445027 12.8415675630986 12.8392655109852 2483168.547004151 20.4272984813203 15693.2460983421 15.551803772566 -7.71103047341216 87470.3093713952 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2090-May-06 09:21 00:13 Earth 0.213493484963101 0.213202333798007 0.213784717429528 15.2842841120391 15.2834675405174 2484542.889731204 12.8906184286756 14962.4432871096 31.881960342098 26.1383411236279 356417.497048116 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2096-May-16 12:14 < 00:01 Jupiter 1.30760543121487 1.30758070997663 1.30763015577741 5.00549647849994 4.87436793102451 2486745.009863637 0.409984473016618 478.302697521237 9.96834207799299 -16.4870987915247 461305.793722361 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2108-Feb-25 23:44 00:04 Jupiter 1.56994301571978 1.56991749643287 1.56996853502821 6.1785056363805 6.09055688419833 2491046.488688784 3.85225038881972 133.080698481401 11.075828097437 -12.9869473295611 517664.700804302 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2121-Aug-14 10:52 00:06 Earth 0.11682212630889 0.116706098072284 0.116938163129915 15.3507481239243 15.3492622610781 2495964.952512857 6.353740366199 5450.50327978005 19.7187856749864 -21.4714000946023 262233.977571354 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2125-Apr-10 22:24 00:03 Earth 0.485873462484821 0.485680282047292 0.486066647470174 25.8827093371629 25.8824974614291 2497300.433594064 3.02933523538229 9841.90822865245 40.6876605661718 15.0293045736321 425381.645343407 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2144-Aug-21 04:33 00:11 Earth 0.169131452292165 0.168849925758383 0.169412998709441 17.3844725565088 17.3835663278764 2504372.689616839 11.1985302064941 13514.4100636577 14.0786526192917 -18.7089785225718 484882.396794449 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2167-Jun-24 01:09 00:30 Earth 0.115994949804219 0.115978511160097 0.116011501619861 11.4218985333221 11.4198872501646 2512714.548230670 29.7046494694273 4137.27284563989 13.7721777333673 81.5827607538633 891765.140948853 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
2190-May-25 14:20 00:10 Earth 0.108318046019554 0.108309893838181 0.108326294254936 11.71607720169 11.7139774485771 2521086.097465237 9.74337852261364 3730.46703461432 39.4218268939186 85.4851720579363 296782.214872021 T 24 CATAB v2.0c-linF95 2015-Feb-04 13:17:03 2015-Feb-04 13:17
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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