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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 234 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4120833913014876 3.527e-08  
a 1.876650522935865 4.3803e-09 au
q 1.103314011156743 6.5938e-08 au
i 33.94175679494762 6.7699e-06 deg
node 280.0728798248728 7.7215e-06 deg
peri 283.6692443953623 1.1448e-05 deg
M 90.15695946773728 1.1902e-05 deg
tp 2458765.336297579911
(2019-Oct-08.83629758)
3.0492e-05 TDB
period 939.0171692904902
2.57
3.2876e-06
9.001e-09
d
yr
n .383379571506676 1.3423e-09 deg/d
Q 2.649987034714986 6.1853e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1276  
   data-arc span      23984 days (65.66 yr)  
   first obs. used      1954-12-30  
   last obs. used      2020-08-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47249  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-31 09:30:49  

Additional Information
 Earth MOID = .329679 au 
 Jupiter MOID = 2.99872 au 
 T_jup = 3.681 
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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

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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 0.492657230539702 0.492656756493962 0.492657704585777 23.6135892804936 23.6133602424651 2453179.673508654 0.0534731336150655 34.2524251147746 13.6261203899686 52.0725651814431 4196056.58905458 T 234 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:12 2020-Aug-31 09:31
2007-Feb-28 17:22 < 00:01 Mars 0.0845388088315385 0.0845383346468797 0.0845392830166947 18.6129786900116 18.6127967466121 2454160.223422683 0.0542802306098206 26.8734190490042 14.144150781731 33.975752484777 634582.896968737 T 234 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:12 2020-Aug-31 09:31
2022-Jun-23 08:33 < 00:01 Earth 0.482729078000983 0.482728274875161 0.482729881128205 23.3556136722477 23.3553773417274 2459753.856349084 0.0655264513870011 59.3336183163652 13.5276325100684 49.2711767307811 3842922.59777982 T 234 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:12 2020-Aug-31 09:31
2040-Jun-22 14:56 < 00:01 Earth 0.476123726792245 0.476122232137468 0.476125221452084 23.1993221502243 23.1990809267909 2466328.122151422 0.0898739754997799 108.446052923652 13.8655599309563 47.0890854927147 3537992.19465515 T 234 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:12 2020-Aug-31 09:31
2058-Jun-22 20:42 < 00:01 Earth 0.468333823567592 0.468331657311934 0.468335989834484 23.0218903151029 23.0216431892489 2472902.362755897 0.114985103958192 158.041083878708 14.0003818798001 47.1240960354581 3438374.68881313 T 234 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:12 2020-Aug-31 09:31
2076-Jun-22 05:49 < 00:01 Earth 0.465368567273578 0.465365764684707 0.465371369881681 22.9222429198754 22.9219931382046 2479476.742022648 0.140092836342374 204.94693408765 14.0403490119388 47.1528600909145 3404125.75187 T 234 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:12 2020-Aug-31 09:31
2084-Apr-16 05:05 < 00:01 Mars 0.059989212434496 0.0599860330600495 0.0599923918889238 19.8909247531561 19.8906848253012 2482331.711806184 0.285949630498516 192.797780893639 14.6979978081877 -34.7965508965555 349661.263862762 T 234 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:12 2020-Aug-31 09:31
2094-Jun-22 16:33 < 00:01 Earth 0.464548627220522 0.464545302874126 0.464551951593904 22.9224139649359 22.9221637442589 2486051.189501711 0.162474126161007 242.632094521217 14.1038775711067 47.0082103769101 3374338.38893474 T 234 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:12 2020-Aug-31 09:31
2112-Jun-23 07:09 < 00:01 Earth 0.469690800985013 0.469687053634139 0.469694548368245 23.0290951365551 23.0288488017655 2492625.797863556 0.178923854397794 270.060250859766 14.1576387033652 46.2989332007929 3355153.30066554 T 234 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:12 2020-Aug-31 09:31
2130-Jun-23 22:38 < 00:01 Earth 0.474754316972423 0.474750228964214 0.474758405016929 23.1437340165294 23.1434915162295 2499200.442757936 0.19415963884487 290.835845824711 14.2075042998146 45.5692731278837 3336424.85496393 T 234 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:12 2020-Aug-31 09:31
2148-Jun-23 12:59 < 00:01 Earth 0.480189342270992 0.480185054529464 0.480193630050379 23.2743362706215 23.2740978604613 2505775.040933029 0.203042751977347 301.835450077089 14.25014529364 44.9613453126267 3327433.27549509 T 234 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:12 2020-Aug-31 09:31
2166-Jun-24 05:36 < 00:01 Earth 0.488115603121464 0.488111218895766 0.488119987383676 23.4412673114205 23.4410344429257 2512349.733174507 0.20595552870153 303.86636289968 14.2972037120706 44.0507241064801 3312997.87522417 T 234 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:12 2020-Aug-31 09:31
2184-Jun-23 22:47 < 00:01 Earth 0.496172004462354 0.496167683749511 0.496176325208168 23.6160249469644 23.615797554854 2518924.449055849 0.204868539165187 295.475387334361 14.3283406660648 43.2455391618734 3310520.34732049 T 234 CATAB v2.0f-lin.ifort 2020-Aug-31 09:31:12 2020-Aug-31 09:31
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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