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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02823353185978887 3.5914e-08  
a 2.274386507052939 8.0486e-09 au
q 2.210172543144586 8.2096e-08 au
i 5.599270960280106 4.3889e-06 deg
node 18.52255732397346 3.6109e-05 deg
peri 301.15691772523 7.9768e-05 deg
M 299.4992581078994 7.1872e-05 deg
tp 2459411.048926583786
(2021-Jul-15.54892658)
0.00025029 TDB
period 1252.837753714547
3.43
6.6503e-06
1.821e-08
d
yr
n .2873476624827385 1.5253e-09 deg/d
Q 2.338600470961293 8.2758e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1160  
   data-arc span      8868 days (24.28 yr)  
   first obs. used      1996-02-14  
   last obs. used      2020-05-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4848  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 11:35:06  

Additional Information
 Earth MOID = 1.20189 au 
 Jupiter MOID = 2.71464 au 
 T_jup = 3.603 
[ 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 15.16   n/a E2021B10  
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

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