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20460 Robwhiteley (1999 LO28)
Classification: Amor [NEO]          SPK-ID: 2020460
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 237 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4120833914784792 3.5252e-08  
a 1.876650522903882 4.3732e-09 au
q 1.103314010805789 6.59e-08 au
i 33.94175670324706 6.4919e-06 deg
node 280.0728797839928 7.7194e-06 deg
peri 283.6692447222911 1.1288e-05 deg
M 90.15695928640041 1.185e-05 deg
tp 2458765.336298058918
(2019-Oct-08.83629806)
3.0349e-05 TDB
period 939.0171692664853
2.57
3.2823e-06
8.986e-09
d
yr
n .3833795715164767 1.3401e-09 deg/d
Q 2.649987035001975 6.1753e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1289  
   data-arc span      24038 days (65.81 yr)  
   first obs. used      1954-12-30  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47209  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-23 08:25:03  

Additional Information
 Earth MOID = .329679 au 
 Jupiter MOID = 2.99872 au 
 T_jup = 3.681 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456629.5 (2013-Dec-03.0) TDB
Reference: JPL 237 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4121443315033801 3.5273e-08  
q 1.103346076200695 6.5944e-08 au
tp 2456886.976695193409
(2014-Aug-17.47669519)
2.6325e-05 TDB
node 280.1068183077835 7.7195e-06 deg
peri 283.6350603044961 1.1283e-05 deg
i 33.94020847834432 6.4916e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1289  
   data-arc span      24038 days (65.81 yr)  
   first obs. used      1954-12-30  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47209  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-23 08:25:03  

Additional Information
 Jupiter MOID = 2.99872 au 
 T_jup = 3.681 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.244160732138158E-15 -2.324292788736403E-15 1.700745569588938E-13 1.208872443646374E-15 1.313234926756465E-14 8.376164468480587E-15
q -2.324292788736403E-15 4.348658573912603E-15 -2.822762278055924E-13 -2.277286705769982E-15 -1.686890655259438E-14 -1.577090836171347E-14
tp 1.700745569588938E-13 -2.822762278055924E-13 6.92980769793851E-10 -3.024572119204187E-12 2.191118124856418E-10 -4.123567242529405E-12
node 1.208872443646374E-15 -2.277286705769982E-15 -3.024572119204187E-12 5.959087682198698E-11 -4.980767464095587E-11 6.31714362906721E-12
peri 1.313234926756465E-14 -1.686890655259438E-14 2.191118124856418E-10 -4.980767464095587E-11 1.273062569162686E-10 -6.43594219274573E-12
i 8.376164468480587E-15 -1.577090836171347E-14 -4.123567242529405E-12 6.31714362906721E-12 -6.43594219274573E-12 4.21406663148106E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO395199  
diameter diameter 2.716 km 0.585 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
rotation period rot_per 2.7209 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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2017) http://www.asu.cas.cz/~ppravec/neo.htm]
[Warner, B.D. (2018) Minor Planet Bull. 45, 19-34.]
geometric albedo albedo 0.199   0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  

20460 Robwhiteley           Discovered 1999 June 13 by the Catalina Sky Survey.
Robert J. Whiteley (b. 1971) is a member of the University of Hawaii Aten Survey and the Catalina Sky Survey. He has also done research into the rotational properties of small, rapidly spinning minor planets and the taxonomic classification of near-earth asteroids.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

[ 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
2004-Jun-23 04:10 < 00:01 Earth 0.492657231801966 0.492656759253672 0.492657704350595 23.6135892935666 23.6133602555388 2453179.673508590 0.0523990253194349 33.998507787555 13.4672106545661 51.7273763540095 4242636.06837432 T 237 CATAB v2.0f-lin.ifort 2020-Oct-23 08:25:18 2020-Oct-23 08:26
2007-Feb-28 17:22 < 00:01 Mars 0.0845388088335092 0.0845383346542446 0.0845392830132689 18.6129786760323 18.6127967326326 2454160.223423024 0.0540316147957207 26.8308939869126 13.9922460877847 33.6337463830849 636671.788212707 T 237 CATAB v2.0f-lin.ifort 2020-Oct-23 08:25:18 2020-Oct-23 08:26
2022-Jun-23 08:33 < 00:01 Earth 0.482729077648083 0.482728274768645 0.482729880528948 23.3556135626834 23.3553772321618 2459753.856348457 0.0648732752457571 59.3189055515203 13.3097699257879 49.2171377526655 3912401.23576355 T 237 CATAB v2.0f-lin.ifort 2020-Oct-23 08:25:18 2020-Oct-23 08:26
2040-Jun-22 14:56 < 00:01 Earth 0.476123725356584 0.476122231768559 0.47612521894967 23.19932218098 23.1990809575462 2466328.122151798 0.0895057422715669 108.420109449706 13.6297175521546 47.098221904945 3608717.93307183 T 237 CATAB v2.0f-lin.ifort 2020-Oct-23 08:25:18 2020-Oct-23 08:26
2058-Jun-22 20:42 < 00:01 Earth 0.468333822307578 0.468331658211372 0.468335986415019 23.0218903144768 23.0216431886221 2472902.362756051 0.114747565895129 157.954396766383 13.7607571103395 47.1403347888189 3508197.6542201 T 237 CATAB v2.0f-lin.ifort 2020-Oct-23 08:25:18 2020-Oct-23 08:26
2076-Jun-22 05:49 < 00:01 Earth 0.465368569041569 0.465365769689864 0.465371368412479 22.9222431219748 22.9219933403072 2479476.742023702 0.139917484252988 204.788715808686 13.7991449550682 47.168692068241 3473618.04547778 T 237 CATAB v2.0f-lin.ifort 2020-Oct-23 08:25:18 2020-Oct-23 08:26
2084-Apr-16 05:05 < 00:01 Mars 0.0599892177049212 0.0599860411015336 0.0599923943879696 19.8909247803834 19.8906848525498 2482331.711806361 0.285785559723293 192.551369654744 14.4888105415813 -34.759694803216 354326.20336869 T 237 CATAB v2.0f-lin.ifort 2020-Oct-23 08:25:18 2020-Oct-23 08:26
2094-Jun-22 16:33 < 00:01 Earth 0.464548632916808 0.464545312952272 0.464551952908305 22.922414108053 22.9221638873807 2486051.189501928 0.162321585255422 242.396845971669 13.8604506843951 47.0236067542182 3443454.329222 T 237 CATAB v2.0f-lin.ifort 2020-Oct-23 08:25:18 2020-Oct-23 08:26
2112-Jun-23 07:09 < 00:01 Earth 0.469690810307108 0.469687068401841 0.469694552244707 23.0290954887893 23.0288491540084 2492625.797864631 0.178776520618023 269.753124100675 13.9115608830758 46.3136830978135 3424262.51543193 T 237 CATAB v2.0f-lin.ifort 2020-Oct-23 08:25:18 2020-Oct-23 08:26
2130-Jun-23 22:38 < 00:01 Earth 0.47475432918711 0.474750247648577 0.474758410761832 23.1437342155307 23.1434917152391 2499200.442757736 0.194009004194948 290.460514467234 13.9580327677536 45.5835180786674 3405632.48801863 T 237 CATAB v2.0f-lin.ifort 2020-Oct-23 08:25:18 2020-Oct-23 08:26
2148-Jun-23 12:59 < 00:01 Earth 0.480189357363484 0.480185076873172 0.480193637891547 23.2743366676785 23.2740982575299 2505775.040933737 0.202884384118566 301.40920927325 13.9980582643113 44.9753765989276 3396831.69711471 T 237 CATAB v2.0f-lin.ifort 2020-Oct-23 08:25:18 2020-Oct-23 08:26
2166-Jun-24 05:36 < 00:01 Earth 0.488115620379364 0.488111244076594 0.488119996718565 23.4412677478853 23.4410348794031 2512349.733175200 0.205792872854422 303.398106132322 14.0407245665098 44.0645733932239 3382860.49683635 T 237 CATAB v2.0f-lin.ifort 2020-Oct-23 08:25:18 2020-Oct-23 08:26
2184-Jun-23 22:47 < 00:01 Earth 0.496172022625286 0.496167710260336 0.496176335023122 23.616025302154 23.6157979100554 2518924.449055945 0.204701507926282 294.98273734163 14.0691491744537 43.2596903120831 3380725.97862342 T 237 CATAB v2.0f-lin.ifort 2020-Oct-23 08:25:18 2020-Oct-23 08:26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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