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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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5904451926603325 4.6996e-08  
a 2.501034852403309 4.5982e-08 AU
q 1.024310847125831 1.2701e-07 AU
i 5.943828938386907 1.2361e-05 deg
node 301.9367838554022 8.2994e-05 deg
peri 323.5755970898552 8.7903e-05 deg
M 325.771302495091 1.033e-05 deg
tp 2457137.861781615291
(2015-Apr-25.36178162)
4.2023e-05 JED
period 1444.701229849973
3.96
3.9842e-05
1.091e-07
d
yr
n .2491864702277472 6.872e-09 deg/d
Q 3.977758857680787 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-Jan-26 05:19:31  

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 10:51 00:11 Earth 0.14703552132837 0.147012249075247 0.147058818049624 5.96834059508997 5.96530357963257 2417381.952322822 11.1135552095041 1744.50968943027 14.9685259331602 55.3089966111061 570118.554224668 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1943-May-25 22:31 00:05 Mars 0.0897724703191117 0.0897043290782517 0.0898406606768577 10.9358995199969 10.9356079020219 2430870.438337013 5.16856531320352 4131.80214648679 26.4266836429083 43.7749375439437 319578.685614824 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1953-Jun-30 21:48 < 00:01 Jupiter 1.80252689889915 1.80249825555569 1.80255554198919 6.22566926014484 6.14972690073212 2434559.408016354 0.381450001584715 377.410520513501 13.7997106540583 -7.38970403183313 266993.222194369 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1955-May-04 16:17 00:02 Earth 0.374372489607244 0.374296586064217 0.374448392950697 15.8291830993255 15.8287334684824 2435232.178391145 1.62333928176303 3713.2974014645 29.8538061965597 11.7461402019031 312309.036013764 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1959-May-16 13:04 00:02 Earth 0.226479671022562 0.226425138412427 0.226534202912015 11.0687893521001 11.0677264240655 2436705.044270556 2.3793853568378 2484.13256879902 25.8915848693546 16.7694598004075 265994.138459281 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1963-Jun-08 15:07 00:04 Earth 0.117993400036212 0.117975324436237 0.118011474810815 6.81269220006464 6.80937675709156 2438189.129835279 4.3609135259173 569.295200630887 17.2717692774931 4.66356342945328 45900.2060594751 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1965-Jul-07 16:45 < 00:01 Jupiter 1.44203773558491 1.44202699574225 1.44204847540063 4.86773723324664 4.74553558662687 2438949.197571224 0.25783967080876 117.014351800811 10.8394652704912 -11.2553820602748 343714.36009624 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1967-Jul-08 11:25 00:02 Earth 0.112430212564836 0.112409406276573 0.112451020473018 9.22151914351732 9.21894882240993 2439679.975957824 2.16926007050261 969.939678580111 20.6499408197267 34.1723872186399 291536.160755334 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1971-Jul-04 00:31 00:02 Earth 0.0925037314941959 0.0924949746640376 0.0925124897820336 8.4231499424355 8.41972962229962 2441136.521624384 1.77109376047145 507.477378095703 19.2444859799413 48.3350205598244 323823.510853406 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1971-Aug-27 14:18 < 00:01 Mars 0.0804908551131387 0.0804897877603992 0.0804919265802428 12.668145257451 12.6678644869844 2441191.095561454 0.833609300105455 925.869078321783 24.5256117398472 88.1666903464301 456261.817183964 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1975-Jul-05 07:02 00:01 Earth 0.0988225777995485 0.0988156444511545 0.0988295116921338 8.58667423057902 8.58353364508076 2442598.792990517 1.13105432812597 366.897128797391 19.6305105550013 43.3857268191823 315972.236074354 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1977-Jul-03 09:35 < 00:01 Jupiter 1.26812911107297 1.26812543715062 1.26813278499153 4.33616144441493 4.17928635462419 2443327.899587898 0.200877655587565 33.2407200228995 9.62150331722603 -19.5080387577999 612695.005834015 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1979-Jul-20 02:39 < 00:01 Earth 0.154752556794027 0.154742657721114 0.154762455830397 11.8845141060755 11.8830652689487 2444074.610089793 0.490933749255552 433.643425439937 22.6334573607075 16.6744533811089 217058.060299191 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1983-Jul-06 17:10 < 00:01 Earth 0.0738695351678541 0.073867365018581 0.0738717054598554 8.84533435271013 8.84125554829929 2445522.215050268 0.492699904255972 138.674016298317 19.203673643361 53.5222878722951 288898.825317396 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1987-Jun-22 03:52 < 00:01 Earth 0.0715008661393821 0.0715000375736676 0.0715016947107463 7.63084087604935 7.6259558409334 2446968.660926900 0.268415584141933 26.6405695702423 9.25191833164382 -39.7494405254907 452088.836207807 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1989-Jun-18 22:32 < 00:01 Jupiter 1.18537107862314 1.18536977597062 1.1853723812746 4.10900577844294 3.93125961326258 2447696.438760289 0.32091685194718 10.6607804262651 7.12128352112128 -74.2334289279467 1671850.36319923 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1991-Jul-04 22:56 < 00:01 Earth 0.0574918271868741 0.0574913044884421 0.057492349886605 8.68696811902491 8.68163143562887 2448442.455884045 0.0710497238336513 20.8536504283248 13.3360111718293 -54.2311346649565 353845.588110231 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1995-May-27 01:43 < 00:01 Earth 0.105487437306795 0.105486546338651 0.105488328273982 9.05437613582272 9.05158603432657 2449864.571595666 0.0809594160264599 29.7664069547934 16.1242165551984 1.99180335479612 334628.321069194 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
1999-May-05 09:37 < 00:01 Earth 0.244270632267266 0.244269133836004 0.244272130697437 14.2808120898979 14.2800482544481 2451303.900366787 0.0785464850246327 67.1726827433347 26.8309062441587 10.0019424221797 461592.490855648 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2001-May-23 07:27 < 00:01 Jupiter 1.1619002102259 1.16189929843151 1.16190112202091 4.00952576194155 3.82338875183885 2452052.810635730 0.391617573128844 9.65596989718538 3.54383307956507 79.8129091773563 3235874.69617412 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2003-May-03 18:29 < 00:01 Earth 0.257616784665348 0.257614915262564 0.257618654066988 15.0201236540599 15.0194350419615 2452763.269976873 0.0735815954239005 85.0100922759377 27.3039143575278 10.8048885836926 415880.819982727 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2013-Apr-17 16:47 < 00:01 Jupiter 1.16014605425515 1.16014527192155 1.16014683658521 3.9907823114367 3.80343839984201 2456400.199642762 0.363294984589765 9.98137612417944 3.86954641112612 83.6011739223895 2970166.67724329 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2025-Mar-10 19:44 < 00:01 Jupiter 1.16072512816452 1.16072445198427 1.16072580434553 4.00393211911461 3.81732905280069 2460745.322007284 0.28388879188661 11.8846988690522 5.77105975917616 -78.2575827229208 1977577.16982554 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2037-Jan-30 07:56 < 00:01 Jupiter 1.15882400259657 1.15882319035517 1.15882481484805 4.03547384798793 3.85008876570158 2465088.830513065 0.580843963668817 19.3032726891243 7.2635017160233 -55.7981657913888 1370499.42168183 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2048-Dec-20 06:09 00:01 Jupiter 1.15461498123918 1.15461328660941 1.15461667593697 4.09283875972638 3.90949285320889 2469430.756197339 1.42248838333029 38.7805746327056 7.9772751403366 -44.2720091544479 1052368.14116338 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2060-Nov-05 00:47 00:03 Jupiter 1.15671727017407 1.1567127983899 1.15672174222701 4.15309685938535 3.97286865493355 2473768.532605607 3.03671080505026 83.9807002431859 8.36979713376214 -37.7492656386898 880998.405385309 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2072-Sep-15 20:19 00:06 Jupiter 1.16896262837583 1.16894932170533 1.16897593602227 4.25182751282887 4.07784876522857 2478101.346720780 5.65673308480789 198.409515371102 8.73969323114373 -30.6309600972897 721223.852967213 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2082-Aug-22 08:32 00:07 Earth 0.41369798667207 0.413356736624248 0.414039225779725 21.7717944114965 21.7714985845878 2481728.855694885 6.56016719840627 16599.2089402913 16.8620903299799 -4.26559479013952 242657.366781053 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2084-Jul-21 01:34 00:09 Jupiter 1.20820678331489 1.2081659484953 1.20824762073155 4.48537872180405 4.32625786690905 2482427.565217587 8.54306678235578 510.677997944755 9.21055487542022 -22.4639533567882 556977.56166723 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2086-Aug-01 01:08 00:20 Earth 0.0901400797041751 0.0897547861374736 0.0905252246749098 12.8415666646899 12.8392646115892 2483168.547000651 20.4273015456694 15693.2446390279 15.5518040940735 -7.71103120659083 87470.281691623 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2090-May-06 09:21 00:13 Earth 0.213493510382415 0.21320235928089 0.213784742785204 15.2842850170174 15.2834684456413 2484542.889728679 12.8906138442427 14962.439908816 31.8819615350829 26.1383385175492 356417.500445708 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2096-May-16 12:14 < 00:01 Jupiter 1.30760543393424 1.30758071274089 1.30763015845189 5.00549656326916 4.87436801835054 2486745.009869103 0.409990380755573 478.30226653045 9.96834224507603 -16.4871004926473 461305.843736511 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2108-Feb-25 23:44 00:04 Jupiter 1.56994301674823 1.56991749776005 1.56996853575793 6.17850561228246 6.09055685981035 2491046.488685720 3.85225867249461 133.07916581909 11.0758203065568 -12.9869967305917 517667.441041906 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2121-Aug-14 10:52 00:06 Earth 0.116822129334071 0.11670610044192 0.116938166810757 15.3507482478384 15.3492623850427 2495964.952513212 6.3537713622968 5450.5341985731 19.7187401920689 -21.4714087085187 262234.69013506 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2125-Apr-10 22:24 00:03 Earth 0.485873453597419 0.485680272471704 0.486066639270993 25.8827091391604 25.8824972634211 2497300.433593796 3.02934841571906 9841.94347833497 40.6876592374424 15.0293051814449 425381.66738638 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2144-Aug-21 04:33 00:11 Earth 0.169131465238199 0.168849938310461 0.169413012049482 17.3844729925498 17.3835667640095 2504372.689618199 11.1985444374744 13514.4289806042 14.0786520549711 -18.7089779240363 484882.441945613 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2167-Jun-24 01:09 00:30 Earth 0.115994949821655 0.115978511196106 0.116011501618553 11.4218985522019 11.4198872690481 2512714.548231237 29.7046265451291 4137.26965227438 13.7721878883333 81.5827653158072 891764.494768556 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
2190-May-25 14:20 00:10 Earth 0.10831804651495 0.108309894427931 0.108326294654899 11.7160772501007 11.7139774970061 2521086.097464793 9.74331480150733 3730.44689177907 39.4219282906672 85.4852011243643 296781.465357276 T 23 CATAB v2.0c-linF95 2015-Jan-26 05:19:34 2015-Jan-26 05:19
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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