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91624 (1999 TP44)
Classification: Outer Main-belt Asteroid          SPK-ID: 2091624
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .009511080606707299 3.7536e-08  
a 3.200477703935555 2.5362e-08 au
q 3.170037702513455 1.1274e-07 au
i 7.446641937013873 4.2908e-06 deg
node 222.4320209072319 2.8938e-05 deg
peri 246.4762681385663 0.00024809 deg
M 171.1631467742286 0.00024895 deg
tp 2458206.174911817870
(2018-Mar-28.67491182)
0.0014414 TDB
period 2091.32069894536
5.73
2.4859e-05
6.806e-08
d
yr
n .1721400262434861 2.0462e-09 deg/d
Q 3.230917705357656 2.5603e-08 au
  Orbit Determination Parameters
   # obs. used (total)      752  
   data-arc span      7594 days (20.79 yr)  
   first obs. used      1999-10-03  
   last obs. used      2020-07-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .547  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:46:51  

Additional Information
 Earth MOID = 2.19318 au 
 Jupiter MOID = 1.77833 au 
 T_jup = 3.181 
[ 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 14.53   n/a MPCxxxxx  
diameter diameter 8.052 km 0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.052   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91624 (1999 TP44)          Discovered 1999-Oct-03 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 TP44 = 2002 GT39 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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