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59171 (1999 AP2)
Classification: Main-belt Asteroid          SPK-ID: 2059171
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02812438402854525 3.6082e-08  
a 2.274227387403256 8.1528e-09 au
q 2.210266142991692 8.2381e-08 au
i 5.599417342264582 4.392e-06 deg
node 18.52480464651375 3.6395e-05 deg
peri 301.2963498087468 8.0173e-05 deg
M 241.873219917963 7.2116e-05 deg
tp 2459411.550442435921
(2021-Jul-16.05044244)
0.00025127 TDB
period 1252.706280270768
3.43
6.7362e-06
1.844e-08
d
yr
n .2873778200602517 1.5453e-09 deg/d
Q 2.33818863181482 8.3821e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1133  
   data-arc span      8840 days (24.20 yr)  
   first obs. used      1996-02-14  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48664  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 11:43:37  

Additional Information
 Earth MOID = 1.20394 au 
 Jupiter MOID = 2.71595 au 
 T_jup = 3.603 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457040.5 (2015-Jan-18.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02839296479095329 3.5987e-08  
q 2.209994776039253 8.2221e-08 au
tp 2456900.923025737222
(2014-Aug-31.42302574)
0.0002479 TDB
node 18.54450646600411 3.6397e-05 deg
peri 299.9548491339116 7.9755e-05 deg
i 5.599825322351458 4.3915e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1133  
   data-arc span      8840 days (24.20 yr)  
   first obs. used      1996-02-14  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48664  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 11:43:37  

Additional Information
 Jupiter MOID = 2.71595 au 
 T_jup = 3.603 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.295058330104419E-15 -2.94509859729442E-15 2.155756192513748E-12 3.136410222029816E-15 6.166548762974808E-13 -5.3598478242303E-16
q -2.94509859729442E-15 6.760247354441572E-15 -4.693384342242885E-12 -7.635187517097129E-15 -1.341681547917935E-12 1.431627555869394E-15
tp 2.155756192513748E-12 -4.693384342242885E-12 6.145492219050826E-8 3.076881817722956E-11 1.760193448910411E-8 6.004300189919686E-12
node 3.136410222029816E-15 -7.635187517097129E-15 3.076881817722956E-11 1.324746592457373E-9 -1.309282521803075E-9 -2.218828456687517E-11
peri 6.166548762974808E-13 -1.341681547917935E-12 1.760193448910411E-8 -1.309282521803075E-9 6.360935752234375E-9 2.379448769968911E-11
i -5.3598478242303E-16 1.431627555869394E-15 6.004300189919686E-12 -2.218828456687517E-11 2.379448769968911E-11 1.928514613838053E-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 15.1   n/a MPO309598  
diameter diameter 3.558 km 0.312 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.097   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

59171 (1999 AP2)          Discovered 1999-Jan-09 by Kobayashi, T. at Oizumi
Reference: 20030614/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
2018-Jun-12 06:06 < 00:01 Juno 0.0217284782700199 0.0217269695284621 0.0217299870996003 8.09377505080694 8.09377498162934 2458281.753937600 0.229100634331564 108.074613731468 34.5206459701333 49.2651133595879 73979.4704611513 T 23 CATAB v2.0f-lin.ifort 2020-May-20 11:43:54 2020-May-20 11:43
2149-Sep-02 02:12 00:02 Eunom 0.0276732531893214 0.0276555736547234 0.0276909395777579 5.26098253394802 5.26098243752809 2506210.591627491 1.9599387824661 1117.36164870136 34.3641845397289 -37.955262039701 74104.5449737696 T 23 CATAB v2.0f-lin.ifort 2020-May-20 11:43:54 2020-May-20 11:43

Alternate Designations
 1999 AP2 = 2001 QS104 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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