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JPL Small-Body Database Browser
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(2018 WR1)
Classification: Apollo [NEO, PHA]          SPK-ID: 3836308
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6448403344686412 1.8189e-06  
a 2.253943260417279 1.0155e-05 au
q .8005097344964611 4.9874e-07 au
i 15.1765086323221 4.7743e-05 deg
node 274.6827988224558 2.5487e-05 deg
peri 244.78086372267 4.0264e-05 deg
M 136.8269002741666 0.00092095 deg
tp 2458530.733672955805
(2019-Feb-16.23367296)
1.6939e-05 TDB
period 1235.984133215358
3.38
0.0083526
2.287e-05
d
yr
n .2912658749619024 1.9683e-06 deg/d
Q 3.707376786338096 1.6703e-05 au
  Orbit Determination Parameters
   # obs. used (total)      183  
   data-arc span      185 days  
   first obs. used      2018-11-27  
   last obs. used      2019-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .46785  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:04:59  

Additional Information
 Earth MOID = .0249377 au 
 Jupiter MOID = 1.69175 au 
 T_jup = 3.280 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 20.3   .44349 E2019A83 autocmod 2.6q
rotation period rot_per 68.6 h n/a LCDB (Rev. 2019-August); 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:
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 304-314.]

[ 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
1927-Dec-31 16:06 9_20:36 Earth 0.0121853325839759 0.00723773114126457 0.138509331379984 17.28217101532 17.2695138709168 2425246.170661642 14196.4668911603 6408839.99711157 10.3230655404157 -36.4601427505673 104257.082647421 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
1948-May-31 18:40 5_13:55 Earth 0.474097294899672 0.379703190573236 0.573650418366921 28.401252362711 28.4010544795216 2432703.277811280 8034.67768253331 5429765.74657194 22.9784270085411 26.4367471777269 1277535.81838971 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
1964-Dec-31 20:45 8_07:55 Earth 0.0225494329497202 0.0151264810378897 0.124844078623654 16.9508554575765 16.9438831837065 2438761.364346275 11994.6599455452 5345900.03360295 9.71116875943332 -42.1394190134191 231241.018258089 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
1975-May-15 08:10 4_01:52 Earth 0.222312875179636 0.210631331403961 0.253303053277824 18.6494215750643 18.6487789023553 2442547.840620579 5871.7412651982 3469583.17349075 21.4716684384436 71.3407618459532 1365019.61704654 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
1991-Dec-31 04:06 05:58 Earth 0.0193609853506269 0.0192141374315155 0.0200633556069898 17.4146733499948 17.4067689639944 2448621.671113450 357.831783697975 169383.436601001 10.1205744396135 82.9453651310548 278691.55040192 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2002-May-12 06:02 03:12 Earth 0.208849302969905 0.208614599108689 0.209105188809888 17.2720758119503 17.2713371528075 2452406.751344223 191.692350085521 105597.283327276 21.3272204112233 83.3496309318894 1359467.78755405 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2019-Jan-11 03:15 < 00:01 Earth 0.121801177764973 0.12179985956787 0.121802495962145 14.2927226328554 14.291192006601 2458494.635201687 0.0534883368002406 65.8928933893739 9.10433784751477 -4.15652795300529 250016.643011389 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2029-May-25 06:40 01:31 Earth 0.341736396713652 0.340726052240973 0.342748255648295 24.3149177114423 24.3145970467226 2462281.777645266 91.1391610827119 61879.6327583176 22.2089817125727 35.4332402474425 1235462.53785075 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2035-Dec-08 03:01 02:26 Earth 0.432747730964459 0.430698260244591 0.434797249591629 29.0509575005945 29.0507455577833 2464669.625437437 146.123097525068 102451.915362149 16.6692762983879 4.02370992263241 257103.506537617 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2046-May-04 22:20 06:37 Earth 0.212544219457956 0.211531873256021 0.213598135425913 14.3776031831393 14.3767312368476 2468470.430401626 396.783779604837 156929.226531418 21.1291813742786 -70.8298140251954 1354497.02822744 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2063-Mar-03 11:17 1_04:32 Earth 0.28688492475256 0.285924790283025 0.28784523338905 12.9546127213131 12.953895765793 2474616.970077445 1712.41259301061 49162.7277445566 25.9522274797157 -13.093870002843 432293.157097129 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2080-Jan-21 01:17 1_03:15 Earth 0.186781372133992 0.181306471372946 0.192353508480918 12.9415069013786 12.9404045693058 2480784.553653690 1635.00882348049 347902.046443634 10.4622708188061 37.6332504702168 1486086.8231062 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2097-Feb-01 13:03 1_08:06 Earth 0.232963477090448 0.228999471599997 0.236955520570933 12.6115398390732 12.6106329127303 2487006.043804949 1926.3377378218 235783.059297351 12.2617961201189 32.7161163644724 1464227.53694507 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2114-Mar-08 05:09 1_05:28 Earth 0.284611714742064 0.28403246731437 0.285191097054384 12.5352579938819 12.5345111338032 2493248.714719103 1767.67851488295 30495.7050208881 24.2454275804295 -18.6644561325287 813883.458557176 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2131-Apr-23 07:53 17:05 Earth 0.243749399010332 0.241910303224382 0.245612148268448 11.540791258256 11.5398440378615 2499503.828346274 1025.45494201828 151185.551478924 21.9644799365746 -52.3656615257818 1315095.33791125 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2148-May-16 10:45 02:08 Earth 0.217731963641483 0.216956625820208 0.218514843866453 19.3493302828836 19.3486978254122 2505736.948135384 127.846801101577 74787.3259506322 20.9893493408307 58.7030406767366 1195320.57298512 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2151-Nov-26 08:59 01:13 Mars 0.0493992517342231 0.0489957074035848 0.0498155966811691 19.4202462634366 19.4199478389741 2507025.874486238 72.9626499489757 44613.9169986043 18.1948642164536 -62.7248160985546 361655.564340168 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2154-Dec-13 13:44 00:57 Earth 0.370903980108728 0.370024995032422 0.371782984901855 26.8397821425342 26.8395144883468 2508139.072368799 57.491383037662 44038.8741558398 16.4096235654151 5.56120092627521 309455.251324239 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2165-Jun-03 03:52 00:20 Earth 0.490064221577686 0.489716691909284 0.490411791269191 29.0686648164188 29.068477775911 2511963.661320128 19.7748977741176 18685.0888126578 14.5812527818576 21.9485350359158 1790830.10790555 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2171-Dec-30 19:06 01:41 Earth 0.063048445112932 0.0625171176834648 0.0635918632867391 17.8151800452444 17.8128077066322 2514365.295641634 101.243188381401 51126.8478259024 18.0334739774048 58.3894354982439 431825.871975506 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
2189-Jan-19 14:52 14:20 Earth 0.185994688356548 0.183058979196373 0.188947707901436 12.6594776279408 12.6583459693073 2520595.119785481 860.208010546512 171942.013295271 10.5916678717621 31.3515682738905 1320607.67787861 T 34 CATAB v2.0f-lin.ifort 2019-Dec-21 06:05:19 2019-Dec-21 06:05
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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