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91624 (1999 TP44)
Classification: 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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01033209697791178 3.7412e-08  
a 3.197617670161954 2.5541e-08 au
q 3.164579574295556 1.1284e-07 au
i 7.451403661517439 4.2969e-06 deg
node 222.4683346350561 2.8948e-05 deg
peri 244.1838796937706 0.00022953 deg
M 138.9709992708196 0.00023017 deg
tp 2458194.268227325813
(2018-Mar-16.76822733)
0.0013313 TDB
period 2088.518033874793
5.72
2.5023e-05
6.851e-08
d
yr
n .1723710277627328 2.0652e-09 deg/d
Q 3.230655766028351 2.5805e-08 au
  Orbit Determination Parameters
   # obs. used (total)      748  
   data-arc span      7594 days (20.79 yr)  
   first obs. used      1999-10-03  
   last obs. used      2020-07-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54713  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:39:10  

Additional Information
 Earth MOID = 2.188 au 
 Jupiter MOID = 1.78386 au 
 T_jup = 3.182 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457156.5 (2015-May-14.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01199172648491346 3.7287e-08  
q 3.15966328357725 1.1324e-07 au
tp 2458183.166235532666
(2018-Mar-05.66623553)
0.0011529 TDB
node 222.4906528379216 2.8945e-05 deg
peri 242.2030498994982 0.000199 deg
i 7.45140121855795 4.2972e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      748  
   data-arc span      7594 days (20.79 yr)  
   first obs. used      1999-10-03  
   last obs. used      2020-07-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54713  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:39:10  

Additional Information
 Jupiter MOID = 1.78386 au 
 T_jup = 3.182 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.390336443017097E-15 -4.126496952319383E-15 4.475281693352821E-12 -6.386339747018922E-15 7.138052947610855E-13 4.404233635319284E-16
q -4.126496952319383E-15 1.282381133386992E-14 -1.966007239372057E-12 1.948448136939247E-14 -2.274447309897779E-13 -1.389664714637301E-15
tp 4.475281693352821E-12 -1.966007239372057E-12 1.329220014973159E-6 5.223870528870175E-11 2.269948774474072E-7 -3.12034527182917E-11
node -6.386339747018922E-15 1.948448136939247E-14 5.223870528870175E-11 8.377889343132923E-10 -8.212899439818973E-10 3.569473299173285E-12
peri 7.138052947610855E-13 -2.274447309897779E-13 2.269948774474072E-7 -8.212899439818973E-10 3.960160768052623E-8 -8.901063514985013E-12
i 4.404233635319284E-16 -1.389664714637301E-15 -3.12034527182917E-11 3.569473299173285E-12 -8.901063514985013E-12 1.846627145069311E-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 14.52   n/a E2021B10  
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

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