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17639 (1996 PA4)
Classification: Main-belt Asteroid          SPK-ID: 2017639
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1660812651481291 3.4203e-08  
a 2.344444033693053 7.0254e-09 au
q 1.955075802508328 8.0528e-08 au
i 3.130330908707361 3.8473e-06 deg
node 102.6097277930532 7.0136e-05 deg
peri 126.2031215932959 7.1158e-05 deg
M .1984095835134609 1.3463e-05 deg
tp 2459199.777366025096
(2020-Dec-16.27736602)
4.9034e-05 TDB
period 1311.167668208388
3.59
5.8936e-06
1.614e-08
d
yr
n .2745644273641318 1.2341e-09 deg/d
Q 2.733812264877778 8.1922e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1592  
   data-arc span      9274 days (25.39 yr)  
   first obs. used      1995-01-31  
   last obs. used      2020-06-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50148  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:09:00  

Additional Information
 Earth MOID = .945581 au 
 Jupiter MOID = 2.25318 au 
 T_jup = 3.541 
[ 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 14.98   n/a E2021B10  
diameter diameter 2.867 km 0.226 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.283   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17639 (1996 PA4)          Discovered 1996-Aug-09 by JPL/GEODSS NEAT at Haleakala
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1996 PA4 = 1999 GT2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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