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181920 (1999 TN79)
Classification: Main-belt Asteroid          SPK-ID: 2181920
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0970053816833862 4.6135e-08  
a 3.122086355233267 3.6211e-08 au
q 2.819227176695372 1.5214e-07 au
i 2.094155294880137 5.9429e-06 deg
node 55.75022968849473 0.00014483 deg
peri 257.1123098854317 0.00014834 deg
M 29.93693006857823 3.4941e-05 deg
tp 2459228.939921240908
(2021-Jan-14.43992124)
0.0001942 TDB
period 2014.957051878429
5.52
3.5055e-05
9.598e-08
d
yr
n .1786638577057474 3.1083e-09 deg/d
Q 3.424945533771163 3.9724e-08 au
  Orbit Determination Parameters
   # obs. used (total)      257  
   data-arc span      7149 days (19.57 yr)  
   first obs. used      1999-10-04  
   last obs. used      2019-05-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53271  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:36  

Additional Information
 Earth MOID = 1.80549 au 
 Jupiter MOID = 1.8095 au 
 T_jup = 3.208 
[ 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 15.8   n/a MPO469958  

181920 (1999 TN79)          Discovered 1999-Oct-11 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

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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
1907-Apr-13 22:08 00:06 Jupiter 1.85615814196258 1.85615728894965 1.85615899497634 2.6536159392427 2.47568486325988 2417679.422150824 5.72771488305388 99.1229163966436 20.6912456254451 -70.0403280574354 2798958.17294983 T 14 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:36 2021-Apr-13 21:32
1917-Jul-12 21:59 00:05 Jupiter 1.85902067344002 1.85901978669099 1.85902156019085 3.14804197562977 2.99981859319543 2421422.416043147 5.14407729116175 131.563950365894 16.6092110885612 -82.5716266265194 2133330.42159868 T 14 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:36 2021-Apr-13 21:32
1979-Oct-01 17:52 00:02 Jupiter 1.98780758650108 1.98780685905092 1.98780831395158 2.91103731714411 2.76078258012618 2444148.244607638 1.87215433570729 86.7126569177034 19.0749973099075 -77.7827380163108 2581277.62052462 T 14 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:36 2021-Apr-13 21:32
1990-Jan-06 21:05 00:01 Jupiter 1.83634263819824 1.83634218149421 1.83634309490217 2.67039095033814 2.49168166395176 2447898.378536451 1.3369302158705 54.5827778842066 12.0490620946612 -85.0027195834077 2693091.37123379 T 14 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:36 2021-Apr-13 21:32
2000-Apr-07 19:35 < 00:01 Jupiter 1.89170585407216 1.89170532007351 1.89170638807076 3.38967991717717 3.25490677038895 2451642.315885128 0.751940630168246 53.9985829831495 18.5883440497926 -84.10092258645 2579154.25750681 T 14 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:36 2021-Apr-13 21:32
2062-Jun-28 13:15 00:02 Jupiter 1.94405245832718 1.94405177239693 1.94405314425776 2.78489519514193 2.62378398993487 2474369.051874569 2.46035776222253 90.5782751682913 15.7807510723459 -79.7406683016723 2568229.3540234 T 14 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:36 2021-Apr-13 21:32
2072-Oct-02 09:17 00:03 Jupiter 1.83928785904673 1.83928738670903 1.83928833138444 2.77024311419709 2.59869463363789 2478117.887120790 3.11416402452072 51.8622118082941 14.9712479761444 -85.6067053879692 2599724.33327647 T 14 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:36 2021-Apr-13 21:32
2083-Jan-05 06:56 00:04 Jupiter 1.93609715045241 1.93609626721543 1.93609803369181 3.67160909149685 3.55045545991186 2481864.789226520 3.62802055639366 147.916908175737 20.6026706788487 -79.44382390898 2628700.22693253 T 14 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:36 2021-Apr-13 21:32
2145-Mar-27 22:41 00:07 Jupiter 1.91206585997125 1.91206456600257 1.91206715394406 2.71192118252161 2.54333250035886 2504591.444876698 6.82641404078673 175.074292109126 17.1732550711426 -74.6020821661285 2548564.50227631 T 14 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:36 2021-Apr-13 21:32
2155-Jun-30 12:46 00:08 Jupiter 1.85338868501161 1.8533881003109 1.85338926971231 2.92255924002337 2.76176152847912 2508338.031817203 7.52772962470396 69.6817559136369 15.4377411434264 88.4168743946453 1618953.25830281 T 14 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:36 2021-Apr-13 21:32
2165-Oct-05 12:27 00:08 Jupiter 1.9850914735544 1.98508957990972 1.9850933672195 3.96877697629429 3.85976771691229 2512088.018997857 7.86090697073607 349.428006749039 21.9062300703938 -77.7102638083204 2773065.21231664 T 14 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:36 2021-Apr-13 21:32
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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