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JPL Small-Body Database Browser
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91635 (1999 TH79)
Classification: Main-belt Asteroid          SPK-ID: 2091635
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2149983937184452 5.5336e-08  
a 2.670105138234721 1.7261e-08 au
q 2.096036822454889 1.4944e-07 au
i 12.52940489259555 8.2109e-06 deg
node 19.44693075027296 2.4881e-05 deg
peri 109.2747152818565 2.9781e-05 deg
M 172.2734037595614 1.7938e-05 deg
tp 2458237.882609781486
(2018-Apr-29.38260978)
7.6371e-05 TDB
period 1593.642747442537
4.36
1.5453e-05
4.231e-08
d
yr
n .2258975548803047 2.1905e-09 deg/d
Q 3.244173454014553 2.0972e-08 au
  Orbit Determination Parameters
   # obs. used (total)      696  
   data-arc span      7158 days (19.60 yr)  
   first obs. used      1999-10-04  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48935  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:04:20  

Additional Information
 Earth MOID = 1.14775 au 
 Jupiter MOID = 1.92001 au 
 T_jup = 3.315 
[ 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 14.7   n/a MPO436412  
diameter diameter 5.709 km 0.145 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 28.099 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.094   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91635 (1999 TH79)          Discovered 1999-Oct-11 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 TH79 = 2000 XZ49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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