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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 ]

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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2171137661134789 4.005e-08  
a 3.16315605784297 2.1713e-08 au
q 2.476391333320017 1.3489e-07 au
i 10.45718943402155 4.7226e-06 deg
node 54.74129705965044 2.6079e-05 deg
peri 259.1078300238518 2.8366e-05 deg
M 269.619679477014 1.2852e-05 deg
tp 2459912.382423688867
(2022-Nov-28.88242369)
7.4956e-05 TDB
period 2054.846358735353
5.63
2.1158e-05
5.793e-08
d
yr
n .1751955801802917 1.8039e-09 deg/d
Q 3.849920782365922 2.6428e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1213  
   data-arc span      9338 days (25.57 yr)  
   first obs. used      1995-11-14  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53612  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:33:50  

Additional Information
 Earth MOID = 1.48875 au 
 Jupiter MOID = 1.59888 au 
 T_jup = 3.142 
[ show covariance matrix ]

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 14.17   n/a MPO636342  
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

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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
1907-Mar-04 05:01 00:03 Jupiter 1.5512966157064 1.55129606642239 1.55129716499447 1.9472461225583 1.64309120007765 2417638.708949897 3.21951501919478 184.318801869936 103.903083798507 -49.683278802961 794729.157544448 T 31 CATAB v2.0g-lin.ifort 2021-Aug-25 14:33:59 2021-Aug-25 14:34
1917-Oct-07 17:25 00:03 Jupiter 1.73812635408516 1.73812467559477 1.73812803257771 3.32015836830624 3.16998627737585 2421509.225584046 2.82733473453996 150.309001860064 32.6163425572262 -67.7094371097167 1346933.29949537 T 31 CATAB v2.0g-lin.ifort 2021-Aug-25 14:33:59 2021-Aug-25 14:34
1992-Aug-09 08:45 < 00:01 Jupiter 1.97793756297182 1.97793678076228 1.97793834518101 2.41980021339725 2.23583600678466 2448843.864417490 0.940852847984495 158.050236024015 17.1725249641628 85.0249938458213 1337277.9216447 T 31 CATAB v2.0g-lin.ifort 2021-Aug-25 14:33:59 2021-Aug-25 14:34
2003-Jan-22 04:01 < 00:01 Jupiter 1.66309502872291 1.66309434896552 1.66309570848056 0.869189127891539 n/a 2452661.667520160 0.607140508895847 53.4750946481581 20.2981149051322 56.7200322124666 10556709.9727647 F 31 CATAB v2.0g-lin.ifort 2021-Aug-25 14:33:59 2021-Aug-25 14:34
2013-Aug-01 13:00 < 00:01 Jupiter 1.59041388730616 1.59041335583559 1.59041441877899 2.28278891365041 2.03616437729891 2456506.041743250 0.289903633357039 114.815872368172 23.7375725612884 -83.9775584197495 2158841.24896943 T 31 CATAB v2.0g-lin.ifort 2021-Aug-25 14:33:59 2021-Aug-25 14:34
2024-Mar-03 07:29 < 00:01 Jupiter 1.89075520380602 1.89075455307578 1.89075585453668 3.94399359855822 3.82872346811252 2460372.812011970 0.413796293469349 78.0482232460076 22.5048650169066 -75.9652417050093 2664355.52144847 T 31 CATAB v2.0g-lin.ifort 2021-Aug-25 14:33:59 2021-Aug-25 14:34
2099-Jan-06 14:01 00:03 Jupiter 1.84662683259827 1.84662556287547 1.8466281023172 1.79367107794929 1.51653659608752 2487710.083788587 2.50270462854164 201.03905569943 153.043707701476 73.0740743089447 538192.074403504 T 31 CATAB v2.0g-lin.ifort 2021-Aug-25 14:33:59 2021-Aug-25 14:34
2109-Jun-21 23:09 00:03 Jupiter 1.61087568485861 1.61087483778783 1.61087653199001 1.03119937519871 0.108361707051684 2491528.464482206 2.96794182295668 402673.84446176 1552.27080656848 0.867843029259257 2267811.54391807 T 31 CATAB v2.0g-lin.ifort 2021-Aug-25 14:33:59 2021-Aug-25 14:34
2120-Jan-04 05:03 00:03 Jupiter 1.67837021694133 1.67836904141328 1.67837139246834 2.72740820017344 2.53562934771081 2495376.710083390 3.14745298027843 101.697794328794 21.6222046704592 -85.0673555211279 827436.98533671 T 31 CATAB v2.0g-lin.ifort 2021-Aug-25 14:33:59 2021-Aug-25 14:34

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