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101798 (1999 HL4)
Classification: Main-belt Asteroid          SPK-ID: 2101798
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2348500123741177 3.9493e-08  
a 2.718282204899898 1.5058e-08 au
q 2.079893595442813 1.0833e-07 au
i 1.798205402248237 4.2116e-06 deg
node 62.40795822771797 0.00017823 deg
peri 343.5738166934469 0.00017855 deg
M 61.98357470582665 1.2172e-05 deg
tp 2458718.652388770916
(2019-Aug-23.15238877)
5.4235e-05 TDB
period 1636.968189137571
4.48
1.3602e-05
3.724e-08
d
yr
n .2199187512554318 1.8274e-09 deg/d
Q 3.356670814356983 1.8595e-08 au
  Orbit Determination Parameters
   # obs. used (total)      570  
   data-arc span      7699 days (21.08 yr)  
   first obs. used      1999-04-06  
   last obs. used      2020-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56364  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:58:27  

Additional Information
 Earth MOID = 1.08955 au 
 Jupiter MOID = 2.04565 au 
 T_jup = 3.319 
[ 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 15.5   n/a MPO412745  

101798 (1999 HL4)          Discovered 1999-Apr-16 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 HL4 = 2001 VS35 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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