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18868 (1999 TD101)
Classification: Outer Main-belt Asteroid          SPK-ID: 2018868
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03588241457754377 3.7167e-08  
a 3.213349523005037 1.8046e-08 au
q 3.098046783238018 1.2211e-07 au
i 12.7416436710828 3.1581e-06 deg
node 116.0927590986011 1.8657e-05 deg
peri 295.3634333096405 5.6995e-05 deg
M 217.8048173888155 5.6414e-05 deg
tp 2460031.532025116427
(2023-Mar-28.03202512)
0.00033399 TDB
period 2103.949821281655
5.76
1.7723e-05
4.852e-08
d
yr
n .1711067423560036 1.4414e-09 deg/d
Q 3.328652262772057 1.8693e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2107  
   data-arc span      15338 days (41.99 yr)  
   first obs. used      1979-03-22  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4461  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:48:36  

Additional Information
 Earth MOID = 2.13562 au 
 Jupiter MOID = 1.85616 au 
 T_jup = 3.151 
[ 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 12.7   n/a MPO474015  
diameter diameter 8.874 km 0.152 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.224   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18868 (1999 TD101)          Discovered 1999-Oct-02 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ 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
2011-Jan-27 17:41 < 00:01 Jupiter 1.97265071709162 1.97265027001113 1.97265116417211 3.49914078733412 3.37419922703049 2455589.237118538 0.221868098860396 32.9334386703067 15.3462824340864 65.457644055707 3909883.47115125 T 32 CATAB v2.0g-lin.ifort 2021-May-04 02:48:46 2021-May-04 02:48
2022-Mar-18 11:50 < 00:01 Jupiter 1.90517048855566 1.90517006736544 1.90517090974588 3.82518045693895 3.70713132043712 2459656.992852998 0.310889560926066 39.5948147965231 17.8408831542345 77.5151962482045 4177149.96507669 T 32 CATAB v2.0g-lin.ifort 2021-May-04 02:48:46 2021-May-04 02:48
2033-May-26 04:01 < 00:01 Jupiter 1.86781881600728 1.86781844614128 1.86781918587327 4.18735903525626 4.07762325015282 2463743.667605484 0.549152671457435 56.8941309591214 16.8666532817996 -89.8769894823868 4792558.4356795 T 32 CATAB v2.0g-lin.ifort 2021-May-04 02:48:46 2021-May-04 02:48
2044-Aug-15 09:07 < 00:01 Jupiter 1.89228840207647 1.89228798969539 1.89228881445786 4.41346521356873 4.31085131047663 2467842.880009346 0.815638566889483 71.1003108609361 15.8604083469536 -81.1303613250963 5451382.50304116 T 32 CATAB v2.0g-lin.ifort 2021-May-04 02:48:46 2021-May-04 02:48
2055-Nov-10 09:02 00:01 Jupiter 1.97256217666521 1.97256159810394 1.97256275522693 4.48086801152167 4.38399062090956 2471946.876180547 1.10152645042281 71.5918710932116 18.8754352260422 -72.5625048370213 5744608.08852235 T 32 CATAB v2.0g-lin.ifort 2021-May-04 02:48:46 2021-May-04 02:48

Alternate Designations
 1999 TD101 = 1979 FA4 = 1984 BS2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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