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101551 (1999 AH1)
Classification: Main-belt Asteroid          SPK-ID: 2101551
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1310760251141364 4.2886e-08  
a 2.521767138132282 1.0841e-08 au
q 2.191223925402451 1.0951e-07 au
i 3.727537259152155 4.4273e-06 deg
node 131.8752890474757 5.8615e-05 deg
peri 223.9198575941315 6.0146e-05 deg
M 286.60867073655 1.4539e-05 deg
tp 2459498.693485463095
(2021-Oct-11.19348546)
5.9806e-05 TDB
period 1462.702145390576
4.00
9.432e-06
2.582e-08
d
yr
n .246119827700035 1.5871e-09 deg/d
Q 2.852310350862112 1.2262e-08 au
  Orbit Determination Parameters
   # obs. used (total)      626  
   data-arc span      8803 days (24.10 yr)  
   first obs. used      1996-04-17  
   last obs. used      2020-05-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55234  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:37:19  

Additional Information
 Earth MOID = 1.1865 au 
 Jupiter MOID = 2.57636 au 
 T_jup = 3.441 
[ 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 16.33   n/a MPCxxxxx  

101551 (1999 AH1)          Discovered 1999-Jan-07 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 AH1 = 1996 HL6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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