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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 ]

[ show orbit diagram ]
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

[ 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
1903-Apr-15 11:22 00:03 Jupiter 1.92741998332327 1.92741931737225 1.92742064927473 3.03782952052233 2.88954835937669 2416219.973563846 2.94090932335257 1059.99476900866 20.7051981684066 -88.6608947270885 1086437.88363835 T 21 CATAB v2.0e-lin.ifort 2019-May-30 06:04:26 2019-May-30 06:04
1985-Nov-22 20:16 < 00:01 Jupiter 1.95245464436793 1.95245397005752 1.95245531867811 2.50333931164322 2.32358749712224 2446392.344679043 0.800320648864014 411.381271398718 35.3202862640989 -87.7731018228556 1176466.74053712 T 21 CATAB v2.0e-lin.ifort 2019-May-30 06:04:26 2019-May-30 06:04
2034-Mar-22 06:29 < 00:01 Jupiter 1.95507586213295 1.95507521994428 1.95507650434196 3.64877274216436 3.52803868309971 2464043.769960824 0.592104445877348 779.484103174211 19.769943298508 -88.5566838021025 1671807.45819138 T 21 CATAB v2.0e-lin.ifort 2019-May-30 06:04:26 2019-May-30 06:04
2116-Nov-04 14:21 00:03 Jupiter 1.91399538941063 1.91399475765299 1.9139960211933 3.16700625515689 3.02404455810285 2494221.097904825 2.74395111028754 1460.58673357193 21.3726570332717 -88.9564675097002 1314780.98599317 T 21 CATAB v2.0e-lin.ifort 2019-May-30 06:04:26 2019-May-30 06:04
2199-Jun-18 12:29 00:05 Jupiter 1.93184708815014 1.93184554015494 1.93184863640077 2.69523401391793 2.52732706292854 2524397.020086094 5.08185822839287 1377.38219249353 49.081651361339 -84.7330315647004 1230850.15597398 T 21 CATAB v2.0e-lin.ifort 2019-May-30 06:04:26 2019-May-30 06:04

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