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136916 (1998 HW115)
Classification: Main-belt Asteroid          SPK-ID: 2136916
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1072107972513533 5.2263e-08  
a 3.057229298054753 2.3607e-08 au
q 2.729461307630108 1.5976e-07 au
i 10.14300853547556 5.7148e-06 deg
node 153.1904226754581 3.1629e-05 deg
peri 13.09450646565708 4.19e-05 deg
M 90.70452949343031 2.5856e-05 deg
tp 2458508.554581559658
(2019-Jan-25.05458156)
0.00013997 TDB
period 1952.497318795423
5.35
2.2615e-05
6.192e-08
d
yr
n .1843792544729839 2.1356e-09 deg/d
Q 3.384997288479398 2.6138e-08 au
  Orbit Determination Parameters
   # obs. used (total)      489  
   data-arc span      7680 days (21.03 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5871  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 08:02:49  

Additional Information
 Earth MOID = 1.73818 au 
 Jupiter MOID = 1.59322 au 
 T_jup = 3.202 
[ 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 MPO436675  

136916 (1998 HW115)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Alternate Designations
 1998 HW115 = 2003 EK27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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