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227979 (2007 HG87)
Classification: Main-belt Asteroid          SPK-ID: 2227979
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08121876262807316 4.3727e-08  
a 3.129626424617683 3.001e-08 au
q 2.875442038922114 1.3197e-07 au
i 2.956856104152477 4.2288e-06 deg
node 125.964408372867 9.8001e-05 deg
peri 126.2827240272134 0.00010252 deg
M 148.9484628456414 3.1012e-05 deg
tp 2458363.798202877656
(2018-Sep-02.29820288)
0.00017384 TDB
period 2022.260862646143
5.54
2.9087e-05
7.964e-08
d
yr
n .1780185764604757 2.5605e-09 deg/d
Q 3.383810810313252 3.2447e-08 au
  Orbit Determination Parameters
   # obs. used (total)      328  
   data-arc span      7663 days (20.98 yr)  
   first obs. used      2000-01-16  
   last obs. used      2021-01-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52189  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 00:41:54  

Additional Information
 Earth MOID = 1.86064 au 
 Jupiter MOID = 1.64275 au 
 T_jup = 3.207 
[ 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 MPO454639  

227979 (2007 HG87)          Discovered 2007-Apr-24 by Spacewatch at Kitt Peak
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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