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175783 (1999 HD7)
Classification: Main-belt Asteroid          SPK-ID: 2175783
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .124240899163778 4.132e-08  
a 2.165550881504652 1.0791e-08 au
q 1.896500892801602 9.121e-08 au
i 2.581759524692678 7.1751e-06 deg
node 210.3697192359358 0.00010581 deg
peri 100.2539879719414 0.00011196 deg
M 205.8849744815127 4.0447e-05 deg
tp 2459698.802994588955
(2022-Apr-29.30299459)
0.00013301 TDB
period 1163.994733469415
3.19
8.7003e-06
2.382e-08
d
yr
n .3092797498550361 2.3117e-09 deg/d
Q 2.434600870207702 1.2132e-08 au
  Orbit Determination Parameters
   # obs. used (total)      228  
   data-arc span      10122 days (27.71 yr)  
   first obs. used      1993-06-20  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56653  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:06:48  

Additional Information
 Earth MOID = .882224 au 
 Jupiter MOID = 2.77962 au 
 T_jup = 3.682 
[ 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 17.7   n/a MPO440000  

175783 (1999 HD7)          Discovered 1999-Apr-19 by Spacewatch at Kitt Peak
Reference: 20080221/Numbers.arcLast Updated: 2008-02-22

Alternate Designations
 1999 HD7 = 2003 US261 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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