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120635 (1996 HE16)
Classification: Main-belt Asteroid          SPK-ID: 2120635
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1906925041122832 4.8763e-08  
a 3.064978715585759 2.3867e-08 au
q 2.480510249259861 1.4851e-07 au
i 4.396556375919205 5.5752e-06 deg
node 46.12670777457377 7.0803e-05 deg
peri 177.0145722156367 7.2153e-05 deg
M 174.5849730549703 1.6179e-05 deg
tp 2458050.017816084319
(2017-Oct-23.51781608)
8.3233e-05 TDB
period 1959.925761204588
5.37
2.2893e-05
6.268e-08
d
yr
n .1836804266395993 2.1455e-09 deg/d
Q 3.649447181911656 2.8419e-08 au
  Orbit Determination Parameters
   # obs. used (total)      454  
   data-arc span      8598 days (23.54 yr)  
   first obs. used      1996-04-18  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57322  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 11:15:46  

Additional Information
 Earth MOID = 1.47184 au 
 Jupiter MOID = 1.33067 au 
 T_jup = 3.200 
[ 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 14.9   n/a MPO453677  
rotation period rot_per 5.03 h n/a LCDB (Rev. 2019-August); 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:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

120635 (1996 HE16)          Discovered 1996-Apr-18 by Elst, E. W. at La Silla
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1996 HE16 = 2001 ES8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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