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18486 (1996 AS2)
Classification: Main-belt Asteroid          SPK-ID: 2018486
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1794864443450202 3.536e-08  
a 3.158177052431549 1.7742e-08 au
q 2.591327082678574 1.0987e-07 au
i 1.995850713089229 4.643e-06 deg
node 38.76934141916123 0.00011674 deg
peri 47.52027082468761 0.00011762 deg
M 159.1326023085971 1.5409e-05 deg
tp 2458094.329747075937
(2017-Dec-06.82974708)
8.3246e-05 TDB
period 2049.996583478474
5.61
1.7275e-05
4.73e-08
d
yr
n .1756100487685423 1.4798e-09 deg/d
Q 3.725027022184524 2.0927e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1652  
   data-arc span      12901 days (35.32 yr)  
   first obs. used      1985-02-20  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49699  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:22:40  

Additional Information
 Earth MOID = 1.60813 au 
 Jupiter MOID = 1.50743 au 
 T_jup = 3.179 
[ 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 13.6   n/a MPO474011  
diameter diameter 8.975 km 0.202 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.62 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:
[Warner, B.D. (2013) Minor Planet Bull. 40, 137-145.]
geometric albedo albedo 0.060   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18486 (1996 AS2)          Discovered 1996-Jan-13 by Kobayashi, T. at Oizumi
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
1915-Aug-02 17:28 00:03 Jupiter 1.89066302853005 1.89066142509081 1.89066463197004 3.26961175624025 3.1295934625227 2420712.227516099 2.75348559691291 113.244147688338 26.8430379732985 64.4737577079582 1592455.27785196 T 19 CATAB v2.0f-lin.ifort 2020-Jun-23 18:22:58 2020-Jun-23 18:23
1926-Feb-17 01:44 00:02 Jupiter 1.58530253719927 1.58530161779556 1.58530345660027 1.59383608960855 1.21314439431729 2424563.572109069 2.42822283893558 179.526483278843 84.9207098460792 8.67395448296661 888635.045818695 T 19 CATAB v2.0f-lin.ifort 2020-Jun-23 18:22:58 2020-Jun-23 18:23
1936-Sep-22 04:41 00:02 Jupiter 1.56984308604598 1.56984258420734 1.5698435878849 1.24696694453036 0.689789195241603 2428433.695195250 1.95989621416007 415.385460180461 197.861577810357 16.5219400087174 2154795.81496024 T 19 CATAB v2.0f-lin.ifort 2020-Jun-23 18:22:58 2020-Jun-23 18:23
1947-Apr-28 09:03 00:02 Jupiter 1.8592851557852 1.85928417752297 1.85928613404732 2.10797476219408 1.87947613194667 2432303.877075487 1.62497551188851 79.7324164727606 6.956917420973 86.8918091893686 1821673.72773917 T 19 CATAB v2.0f-lin.ifort 2020-Jun-23 18:22:58 2020-Jun-23 18:23
2022-Mar-01 17:30 < 00:01 Jupiter 1.79367963509424 1.79367910523854 1.79368016494982 2.75383280153003 2.57665339177291 2459640.229091932 0.384221261653466 49.395809996638 13.5403228397773 -87.735148016466 2334467.32512584 T 19 CATAB v2.0f-lin.ifort 2020-Jun-23 18:22:58 2020-Jun-23 18:23
2032-Sep-19 00:25 < 00:01 Jupiter 1.53173906037789 1.53173867093295 1.53173944982369 1.36832136543328 0.875409313158946 2463494.517566551 0.688251390123195 232.695541184189 127.205026961308 30.4120639089858 2317165.82623636 T 19 CATAB v2.0f-lin.ifort 2020-Jun-23 18:22:58 2020-Jun-23 18:23
2043-Apr-27 11:45 00:01 Jupiter 1.61034477133833 1.61034413373455 1.61034540894057 1.34792386558497 0.87459827267836 2467366.989325580 1.06846385506202 248.10728483708 119.817578095682 10.0555139268513 1600435.98438809 T 19 CATAB v2.0f-lin.ifort 2020-Jun-23 18:22:58 2020-Jun-23 18:23
2053-Nov-29 22:11 00:01 Jupiter 1.94974020531721 1.94973924243042 1.94974116820399 2.46216258004767 2.2789005622539 2471236.424474400 1.41033778898855 68.2685912478792 11.5265900631797 75.7474589115946 1931530.89069086 T 19 CATAB v2.0f-lin.ifort 2020-Jun-23 18:22:58 2020-Jun-23 18:23
2128-Oct-06 23:05 00:04 Jupiter 1.70438621393157 1.70438458664172 1.70438784122065 2.31517129138791 2.08951800716024 2498575.461484444 3.49930550854442 109.182755346691 7.83229223471089 -89.6016638959082 1099842.19481246 T 19 CATAB v2.0f-lin.ifort 2020-Jun-23 18:22:58 2020-Jun-23 18:23
2139-May-02 17:00 00:04 Jupiter 1.50161872631245 1.50161837371264 1.50161907891747 1.23731068230537 0.63465881368325 2502435.208025848 3.70448335578358 752.549236628855 313.746001979759 4.22284813726794 1542801.58152684 T 19 CATAB v2.0f-lin.ifort 2020-Jun-23 18:22:58 2020-Jun-23 18:23
2149-Dec-09 09:41 00:04 Jupiter 1.66207561959211 1.66207356921218 1.66207766996221 1.50123664659382 1.11107013172052 2506308.903288682 4.14300687289488 283.625338893979 84.5594073651679 3.12003170331993 579260.798960442 T 19 CATAB v2.0f-lin.ifort 2020-Jun-23 18:22:58 2020-Jun-23 18:23

Alternate Designations
 1996 AS2 = 1985 DQ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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