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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 246 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4121257965646264 3.5236e-08  
a 1.876431767487354 4.3386e-09 au
q 1.103105830612459 6.5853e-08 au
i 33.94167448836115 6.2795e-06 deg
node 280.0723680783783 7.7132e-06 deg
peri 283.6497310711528 1.1178e-05 deg
M 166.8742729473392 1.2002e-05 deg
tp 2458765.304417977645
(2019-Oct-08.80441798)
3.0244e-05 TDB
period 938.8529865085231
2.57
3.2561e-06
8.915e-09
d
yr
n .3834466153628535 1.3299e-09 deg/d
Q 2.64975770436225 6.1266e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1322  
   data-arc span      24094 days (65.97 yr)  
   first obs. used      1954-12-30  
   last obs. used      2020-12-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47022  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 07:25:49  

Additional Information
 Earth MOID = .328197 au 
 Jupiter MOID = 2.99811 au 
 T_jup = 3.681 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456729.5 (2014-Mar-13.0) TDB
Reference: JPL 246 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4120554208880769 3.5269e-08  
q 1.103603120080847 6.5926e-08 au
tp 2456886.985549576965
(2014-Aug-17.48554958)
2.6189e-05 TDB
node 280.1071510591923 7.7122e-06 deg
peri 283.6212087555048 1.1171e-05 deg
i 33.93974795551863 6.2792e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1322  
   data-arc span      24094 days (65.97 yr)  
   first obs. used      1954-12-30  
   last obs. used      2020-12-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47022  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 07:25:49  

Additional Information
 Jupiter MOID = 2.99811 au 
 T_jup = 3.681 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.243876937006539E-15 -2.323379301256154E-15 1.675964665422951E-13 1.159188983271435E-15 1.184812608065679E-14 8.28169462104682E-15
q -2.323379301256154E-15 4.346272171229267E-15 -2.771260203760194E-13 -2.17674463665155E-15 -1.431118779621774E-14 -1.559573340322751E-14
tp 1.675964665422951E-13 -2.771260203760194E-13 6.858426155535299E-10 -3.052990567786919E-12 2.148776996697917E-10 -4.184963626052074E-12
node 1.159188983271435E-15 -2.17674463665155E-15 -3.052990567786919E-12 5.947780039581317E-11 -4.974671431142406E-11 5.798284198321286E-12
peri 1.184812608065679E-14 -1.431118779621774E-14 2.148776996697917E-10 -4.974671431142406E-11 1.248009270719963E-10 -6.101052648455103E-12
i 8.28169462104682E-15 -1.559573340322751E-14 -4.184963626052074E-12 5.798284198321286E-12 -6.101052648455103E-12 3.942824809063032E-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. 2020-October); 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 0.492657231931144 0.492656760460401 0.492657703402196 23.6135893589652 23.6133603209382 2453179.673508520 0.0516109600490669 33.8099097153992 13.3401572971422 51.4544488970846 4280670.55232012 T 246 CATAB v2.0f-lin.ifort 2020-Dec-18 07:25:53 2020-Dec-18 07:25
2007-Feb-28 17:22 < 00:01 Mars 0.0845388083344914 0.0845383342009969 0.0845392824684809 18.6129788077167 18.6127968643172 2454160.223422898 0.0538421506275678 26.7953960748232 13.8956724727766 33.3921303427545 637893.878185423 T 246 CATAB v2.0f-lin.ifort 2020-Dec-18 07:25:53 2020-Dec-18 07:25
2022-Jun-23 08:33 < 00:01 Earth 0.48272907983584 0.482728277014681 0.482729882658427 23.3556138306948 23.355377500177 2459753.856349395 0.064392390199544 59.2926938198504 13.1469019852533 49.1553877776797 3966065.45379217 T 246 CATAB v2.0f-lin.ifort 2020-Dec-18 07:25:53 2020-Dec-18 07:25
2040-Jun-22 14:56 < 00:01 Earth 0.476123730518622 0.476122237378498 0.476125223663807 23.1993223224604 23.1990810990306 2466328.122151596 0.0892378165282782 108.399849820397 13.4525346661606 47.0918460015673 3664070.78555425 T 246 CATAB v2.0f-lin.ifort 2020-Dec-18 07:25:53 2020-Dec-18 07:25
2058-Jun-22 20:42 < 00:01 Earth 0.468333829943442 0.468331666889893 0.468335993008226 23.0218906387435 23.0216435128963 2472902.362756678 0.114580905486401 157.90449683378 13.5801821937592 47.1432912516123 3563253.77416849 T 246 CATAB v2.0f-lin.ifort 2020-Dec-18 07:25:53 2020-Dec-18 07:25
2076-Jun-22 05:49 < 00:01 Earth 0.465368575780515 0.465365778084762 0.465371373495472 22.9222432640059 22.9219934823435 2479476.742023305 0.13980250882995 204.69934708269 13.6170001889041 47.1734403899561 3528640.84896135 T 246 CATAB v2.0f-lin.ifort 2020-Dec-18 07:25:53 2020-Dec-18 07:25
2084-Apr-16 05:05 < 00:01 Mars 0.0599892209074025 0.0599860458424271 0.0599923960518648 19.8909249676927 19.8906850398742 2482331.711806730 0.28570637239048 192.415791307786 14.3482856684686 -34.7393503861772 357571.336087452 T 246 CATAB v2.0f-lin.ifort 2020-Dec-18 07:25:53 2020-Dec-18 07:25
2094-Jun-22 16:33 < 00:01 Earth 0.464548637232343 0.464545319587352 0.464551954904269 22.922414265598 22.9221640449297 2486051.189501924 0.162228803645493 242.263868963389 13.6762352663791 47.0291235744061 3498330.91695909 T 246 CATAB v2.0f-lin.ifort 2020-Dec-18 07:25:53 2020-Dec-18 07:25
2112-Jun-23 07:09 < 00:01 Earth 0.469690812256361 0.469687073301326 0.469694551243674 23.0290955192742 23.0288491844946 2492625.797864127 0.178691913975962 269.578104857831 13.7245684795502 46.3193364878178 3479358.02018137 T 246 CATAB v2.0f-lin.ifort 2020-Dec-18 07:25:53 2020-Dec-18 07:25
2130-Jun-23 22:38 < 00:01 Earth 0.474754328154661 0.474750250185312 0.474758406160172 23.1437343266542 23.1434918263632 2499200.442758086 0.1939260820333 290.244582293958 13.7677529859283 45.5891807566173 3460973.59517115 T 246 CATAB v2.0f-lin.ifort 2020-Dec-18 07:25:53 2020-Dec-18 07:25
2148-Jun-23 12:59 < 00:01 Earth 0.480189352198138 0.480185075759795 0.480193628674176 23.2743367285999 23.2740983184493 2505775.040934259 0.20279825615872 301.162056936251 13.8052954045452 44.9810812685094 3452446.46736214 T 246 CATAB v2.0f-lin.ifort 2020-Dec-18 07:25:53 2020-Dec-18 07:25
2166-Jun-24 05:36 < 00:01 Earth 0.488115611717036 0.488111239897596 0.488119983572879 23.4412676120994 23.4410347436117 2512349.733174917 0.205704473352677 303.123868194842 13.8438087768155 44.0701934337777 3439037.04935436 T 246 CATAB v2.0f-lin.ifort 2020-Dec-18 07:25:53 2020-Dec-18 07:25
2184-Jun-23 22:47 < 00:01 Earth 0.496172011613236 0.496167704021589 0.49617631923774 23.6160251633688 23.6157977712638 2518924.449055919 0.204609460927795 294.691697056823 13.8695178109295 43.2654363808361 3437292.87689335 T 246 CATAB v2.0f-lin.ifort 2020-Dec-18 07:25:53 2020-Dec-18 07:25
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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