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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .21339977068122 3.6487e-08  
a 2.234873113159941 6.2087e-09 au
q 1.757951703309985 8.1118e-08 au
i 4.477092217775381 3.7228e-06 deg
node 318.7541927211462 4.0432e-05 deg
peri 40.38359667548533 4.1031e-05 deg
M 56.37184002373561 7.9162e-06 deg
tp 2459009.410227679249
(2020-Jun-08.91022768)
2.6354e-05 TDB
period 1220.3312506121
3.34
5.0853e-06
1.392e-08
d
yr
n .2950018692215162 1.2293e-09 deg/d
Q 2.711794523009897 7.5336e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2010  
   data-arc span      17302 days (47.37 yr)  
   first obs. used      1973-10-27  
   last obs. used      2021-03-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45184  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:18:30  

Additional Information
 Earth MOID = .755256 au 
 Jupiter MOID = 2.74786 au 
 T_jup = 3.605 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.64   n/a E2021B10  
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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