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17957 (1999 JE29)
Classification: Main-belt Asteroid          SPK-ID: 2017957
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .21339977063796 3.6476e-08  
a 2.234873113133246 6.2077e-09 au
q 1.757951703385668 8.1091e-08 au
i 4.477092215428489 3.722e-06 deg
node 318.7541926887728 4.042e-05 deg
peri 40.38359670477722 4.1019e-05 deg
M 56.37184003348338 7.9156e-06 deg
tp 2459009.410227649629
(2020-Jun-08.91022765)
2.6353e-05 TDB
period 1220.331250590235
3.34
5.0845e-06
1.392e-08
d
yr
n .2950018692268018 1.2291e-09 deg/d
Q 2.711794522880824 7.5324e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2014  
   data-arc span      17310 days (47.39 yr)  
   first obs. used      1973-10-27  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4514  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:38:39  

Additional Information
 Earth MOID = .755256 au 
 Jupiter MOID = 2.74786 au 
 T_jup = 3.605 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457064.5 (2015-Feb-11.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .213445178210257 3.6377e-08  
q 1.758385547083785 8.0876e-08 au
tp 2456569.229210078987
(2013-Oct-03.72921008)
2.2017e-05 TDB
node 318.8268654515065 4.0418e-05 deg
peri 40.44038108261611 4.102e-05 deg
i 4.476971760192784 3.7217e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2014  
   data-arc span      17310 days (47.39 yr)  
   first obs. used      1973-10-27  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4514  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:38:39  

Additional Information
 Jupiter MOID = 2.74786 au 
 T_jup = 3.605 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.323292395928816E-15 -2.936726703521599E-15 -4.283655795564089E-14 1.38500059708593E-14 -4.119082319380022E-14 4.528540282643869E-16
q -2.936726703521599E-15 6.540969408259466E-15 1.20223986024061E-13 -3.104440647042678E-14 1.00766745201668E-13 -1.008818025526039E-15
tp -4.283655795564089E-14 1.20223986024061E-13 4.847572046275938E-10 -4.029801589171681E-12 1.604042317841813E-10 -2.106086172259659E-13
node 1.38500059708593E-14 -3.104440647042678E-14 -4.029801589171681E-12 1.633631816935029E-9 -1.629953272674786E-9 4.028027950503608E-11
peri -4.119082319380022E-14 1.00766745201668E-13 1.604042317841813E-10 -1.629953272674786E-9 1.682674634424358E-9 -4.022916211227509E-11
i 4.528540282643869E-16 -1.008818025526039E-15 -2.106086172259659E-13 4.028027950503608E-11 -4.022916211227509E-11 1.385097431431159E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.63   n/a MPCxxxxx  
diameter diameter 3.186 km 0.821 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 72.5097 h n/a LCDB (Rev. 2020-October); 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.303   0.192 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

17957 (1999 JE29)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 JE29 = 1973 UX2 = 1993 RV20 = 1997 XW8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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