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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1310692248873909 4.5771e-08  
a 2.521052592532077 1.1168e-08 au
q 2.190620183328551 1.1729e-07 au
i 3.727396680069047 4.4978e-06 deg
node 131.8789769575971 6.3587e-05 deg
peri 224.0471897911762 6.5003e-05 deg
M 237.2329740614097 1.4448e-05 deg
tp 2459499.097985851683
(2021-Oct-11.59798585)
5.9851e-05 TDB
period 1462.080501945139
4.00
9.7155e-06
2.66e-08
d
yr
n .2462244722647346 1.6362e-09 deg/d
Q 2.851485001735604 1.2632e-08 au
  Orbit Determination Parameters
   # obs. used (total)      611  
   data-arc span      8803 days (24.10 yr)  
   first obs. used      1996-04-17  
   last obs. used      2020-05-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55761  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:59:54  

Additional Information
 Earth MOID = 1.18766 au 
 Jupiter MOID = 2.57723 au 
 T_jup = 3.441 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457175.5 (2015-Jun-02.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1293557133825278 4.5634e-08  
q 2.197312862626393 1.167e-07 au
tp 2456572.783539829408
(2013-Oct-07.28353983)
5.6667e-05 TDB
node 131.8979506049105 6.3531e-05 deg
peri 223.9686834192999 6.4998e-05 deg
i 3.727307883316784 4.498e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      611  
   data-arc span      8803 days (24.10 yr)  
   first obs. used      1996-04-17  
   last obs. used      2020-05-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55761  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:59:54  

Additional Information
 Jupiter MOID = 2.57723 au 
 T_jup = 3.441 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.082458076756967E-15 -5.307319520948147E-15 -3.302269263110797E-13 3.607866261693445E-14 -1.179310779498497E-13 1.092134448262505E-15
q -5.307319520948147E-15 1.36200568201798E-14 8.576718530171233E-13 -9.30300782150782E-14 3.130954952500628E-13 -2.662387536598778E-15
tp -3.302269263110797E-13 8.576718530171233E-13 3.21114703977368E-9 -1.137110339033253E-11 7.948543707486689E-10 1.573906692324835E-12
node 3.607866261693445E-14 -9.30300782150782E-14 -1.137110339033253E-11 4.036177907204416E-9 -4.03028924672999E-9 8.438465757372221E-11
peri -1.179310779498497E-13 3.130954952500628E-13 7.948543707486689E-10 -4.03028924672999E-9 4.224791765295435E-9 -8.38240337804706E-11
i 1.092134448262505E-15 -2.662387536598778E-15 1.573906692324835E-12 8.438465757372221E-11 -8.38240337804706E-11 2.023155839973265E-11

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 16.32   n/a E2021B55  

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2115-Dec-27 19:07 < 00:01 Juno 0.0211151969481703 0.0211124510569727 0.0211179564220775 5.12914165634322 5.12914154401053 2493908.296508101 0.72216619442484 907.171130279114 46.3580033639389 81.8083254084396 67403.2433446118 T 20 CATAB v2.0f-lin.ifort 2020-Nov-12 19:59:56 2020-Nov-12 19:59

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