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JPL Small-Body Database Browser
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18477 (1995 WA11)
Classification: Main-belt Asteroid          SPK-ID: 2018477
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .216857359095131 4.1352e-08  
a 3.1645611718296 2.3419e-08 au
q 2.47830279341164 1.3748e-07 au
i 10.455618824714 5.1721e-06 deg
node 54.75925132185034 2.7127e-05 deg
peri 258.9777191428808 2.9603e-05 deg
M 200.3952975949641 1.2761e-05 deg
tp 2459912.115816424597
(2022-Nov-28.61581642)
7.5238e-05 TDB
period 2056.215693946246
5.63
2.2825e-05
6.249e-08
d
yr
n .1750789088225932 1.9435e-09 deg/d
Q 3.85081955024756 2.8498e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1012  
   data-arc span      8844 days (24.21 yr)  
   first obs. used      1995-11-14  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56594  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:26:44  

Additional Information
 Earth MOID = 1.49117 au 
 Jupiter MOID = 1.59824 au 
 T_jup = 3.142 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456778.5 (2014-May-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2126514544082927 4.0855e-08  
q 2.499974241181457 1.3538e-07 au
tp 2455788.296514649653
(2011-Aug-14.79651465)
7.8507e-05 TDB
node 55.10525015108016 2.7101e-05 deg
peri 257.9138083377001 2.9816e-05 deg
i 10.45006092229736 5.1613e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1012  
   data-arc span      8844 days (24.21 yr)  
   first obs. used      1995-11-14  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56594  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:26:44  

Additional Information
 Jupiter MOID = 1.59824 au 
 T_jup = 3.142 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.66914415976813E-15 -5.48219656606937E-15 1.106140248084964E-12 -6.01854423656353E-15 1.559124418247856E-13 1.297026797306271E-15
q -5.48219656606937E-15 1.832898545426047E-14 -3.985318956954784E-12 1.079432441495442E-14 -5.402628234300623E-13 -2.127793607876469E-15
tp 1.106140248084964E-12 -3.985318956954784E-12 6.16342548953206E-9 2.052346978418679E-11 9.947504485051666E-10 -7.064751296853464E-12
node -6.01854423656353E-15 1.079432441495442E-14 2.052346978418679E-11 7.344894165866279E-10 -7.213561810062054E-10 -4.047184670078916E-11
peri 1.559124418247856E-13 -5.402628234300623E-13 9.947504485051666E-10 -7.213561810062054E-10 8.88986128663769E-10 3.933737331939297E-11
i 1.297026797306271E-15 -2.127793607876469E-15 -7.064751296853464E-12 -4.047184670078916E-11 3.933737331939297E-11 2.663860732113266E-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 14.2   n/a MPO381412  
diameter diameter 10.900 km 0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.045   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18477 (1995 WA11)          Discovered 1995-Nov-16 by Spacewatch at Kitt Peak
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ 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
1907-Mar-04 05:00 00:03 Jupiter 1.5512965491908 1.55129595407253 1.55129714431418 1.94724682996214 1.64309202234576 2417638.708350952 3.32702373620368 199.325047804645 111.882603810659 -51.3443022410789 755857.434372379 T 24 CATAB v2.0f-lin.ifort 2020-Feb-22 22:26:47 2020-Feb-22 22:27
1917-Oct-07 17:24 00:03 Jupiter 1.73812673115034 1.73812503836969 1.73812842393306 3.32015960556295 3.16998760574562 2421509.225095282 2.91286726739275 156.870135196285 36.65123897383 -69.373738167327 1177687.23676697 T 24 CATAB v2.0f-lin.ifort 2020-Feb-22 22:26:47 2020-Feb-22 22:27
1992-Aug-09 08:45 < 00:01 Jupiter 1.97793744851379 1.97793664375917 1.97793825326795 2.41980034424374 2.23583613625561 2448843.864387546 0.94845140709572 161.041032888881 20.0809109336006 85.606333884202 1333133.98792138 T 24 CATAB v2.0f-lin.ifort 2020-Feb-22 22:26:47 2020-Feb-22 22:27
2003-Jan-22 04:01 < 00:01 Jupiter 1.66309498254003 1.66309427173142 1.66309569334895 0.869188353946284 n/a 2452661.667566844 0.614590037628012 57.5297184133528 21.7429602066914 58.2938224695438 9993411.62986187 F 24 CATAB v2.0f-lin.ifort 2020-Feb-22 22:26:47 2020-Feb-22 22:27
2013-Aug-01 13:00 < 00:01 Jupiter 1.5904138984128 1.59041332567697 1.59041447115098 2.28278773829824 2.03616305996717 2456506.041782211 0.3078686217102 118.968126778691 28.315785431895 -83.1251241443926 1816531.71153173 T 24 CATAB v2.0f-lin.ifort 2020-Feb-22 22:26:47 2020-Feb-22 22:27
2024-Mar-03 07:29 < 00:01 Jupiter 1.8907551722284 1.89075447377108 1.89075587068615 3.94399323281726 3.82872308875983 2460372.812025553 0.45320048619267 89.4557998189868 24.7835231372439 -77.5307022293175 2410703.15261868 T 24 CATAB v2.0f-lin.ifort 2020-Feb-22 22:26:47 2020-Feb-22 22:27
2099-Jan-06 14:01 00:03 Jupiter 1.84662673764737 1.84662538532507 1.84662808996537 1.79367149112434 1.51653706754412 2487710.083776470 2.64163395036052 204.319681691574 157.808396473899 70.234046351403 516248.55913574 T 24 CATAB v2.0f-lin.ifort 2020-Feb-22 22:26:47 2020-Feb-22 22:27
2109-Jun-21 23:09 00:03 Jupiter 1.61087562873576 1.6108747635781 1.61087649394524 1.03119889134694 0.10835690661804 2491528.464263076 3.11658007619172 442084.253897301 1763.82755853024 0.914199861104362 2096112.7955139 T 24 CATAB v2.0f-lin.ifort 2020-Feb-22 22:26:47 2020-Feb-22 22:27
2120-Jan-04 05:02 00:03 Jupiter 1.67837051375686 1.67836922003038 1.6783718074822 2.72740900498801 2.53563024749507 2495376.709630414 3.30421225309667 105.374908126158 24.4581581726419 -83.7587097106976 758009.660539117 T 24 CATAB v2.0f-lin.ifort 2020-Feb-22 22:26:47 2020-Feb-22 22:27

Alternate Designations
 1995 WA11 = 1999 JK45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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