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181925 (1999 TW117)
Classification: Main-belt Asteroid          SPK-ID: 2181925
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03785423968339904 5.7985e-08  
a 3.082285395193413 2.9756e-08 au
q 2.965607825071122 1.9717e-07 au
i 7.404513503900618 3.7269e-06 deg
node 235.3816856748375 3.8913e-05 deg
peri 88.50311830413044 8.2772e-05 deg
M 16.61280925192126 6.8716e-05 deg
tp 2459109.288777343022
(2020-Sep-16.78877734)
0.00037788 TDB
period 1976.549520227268
5.41
2.8622e-05
7.836e-08
d
yr
n .1821355834072937 2.6375e-09 deg/d
Q 3.198962965315705 3.0883e-08 au
  Orbit Determination Parameters
   # obs. used (total)      553  
   data-arc span      7736 days (21.18 yr)  
   first obs. used      1999-10-04  
   last obs. used      2020-12-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55565  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:37  

Additional Information
 Earth MOID = 1.96365 au 
 Jupiter MOID = 1.93318 au 
 T_jup = 3.214 
[ 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 15.30   n/a MPCxxxxx  
diameter diameter 4.228 km 0.941 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.119   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

181925 (1999 TW117)          Discovered 1999-Oct-04 by LINEAR at Socorro
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ 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
1940-May-31 04:24 00:03 Jupiter 1.97699639882486 1.97699593088059 1.97699686676913 4.11913627069081 4.01377695739931 2429780.683617360 3.21885782462856 199.391133351596 20.7023970437282 -88.6492883050031 3570401.70537709 T 18 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:38 2021-Apr-13 21:32
2000-Mar-18 06:04 < 00:01 Jupiter 1.95511223256695 1.95511168438843 1.95511278074547 4.19262297151383 4.08798458051636 2451621.752611546 0.639405134880595 57.3749184786901 23.7581704978941 84.0915181319861 3385202.29552991 T 18 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:38 2021-Apr-13 21:32
2060-Jan-01 23:13 00:02 Jupiter 1.95729442034172 1.95729399229997 1.95729484838425 4.20840253043093 4.10428415613515 2473460.467072598 1.94487632463203 125.976463986011 16.3353254653195 -85.8776778018002 3993327.73817607 T 18 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:38 2021-Apr-13 21:32
2119-Oct-17 23:49 00:04 Jupiter 1.98527423335277 1.98527364303001 1.9852748236814 4.15589958105645 4.05193731804222 2495298.492393946 4.47710240155134 225.050055275083 16.7768697327208 83.4492600468694 4183471.70573882 T 18 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:38 2021-Apr-13 21:32
2189-Jul-11 10:55 00:07 Jupiter 1.97635730569831 1.97635586904267 1.97635874239146 4.2049620867088 4.10177411736251 2520767.954590078 7.48725978514416 462.381223769133 19.4061251995818 -81.5897903847603 3619352.76624709 T 18 CATAB v2.0f-lin.ifort 2021-Apr-13 21:32:38 2021-Apr-13 21:32

Alternate Designations
 1999 TW117 = 2004 RB92 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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