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JPL Small-Body Database Browser
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91487 (1999 RT117)
Classification: Main-belt Asteroid          SPK-ID: 2091487
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1286297750942957 5.9203e-08  
a 2.671860459914305 1.7034e-08 au
q 2.328179649872187 1.5495e-07 au
i 13.57730967147001 4.3148e-06 deg
node 282.3158276772448 2.1671e-05 deg
peri 72.29995232216619 2.7779e-05 deg
M 249.9365163003067 1.8838e-05 deg
tp 2459488.207956195117
(2021-Sep-30.70795619)
8.5198e-05 TDB
period 1595.214491931726
4.37
1.5255e-05
4.177e-08
d
yr
n .2256749809011939 2.1581e-09 deg/d
Q 3.015541269956424 1.9225e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1183  
   data-arc span      7595 days (20.79 yr)  
   first obs. used      1999-07-13  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47718  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:41:36  

Additional Information
 Earth MOID = 1.36289 au 
 Jupiter MOID = 2.44281 au 
 T_jup = 3.329 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457179.5 (2015-Jun-06.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .127698550042722 5.9074e-08  
q 2.331269666974216 1.5417e-07 au
tp 2457894.611181409653
(2017-May-21.11118141)
8.0826e-05 TDB
node 282.3343573525481 2.1671e-05 deg
peri 72.63694338933972 2.7856e-05 deg
i 13.57525466609512 4.3143e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1183  
   data-arc span      7595 days (20.79 yr)  
   first obs. used      1999-07-13  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47718  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:41:36  

Additional Information
 Jupiter MOID = 2.44281 au 
 T_jup = 3.329 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.489775946037745E-15 -9.067315169047809E-15 1.418943758050828E-12 -3.982602771852555E-14 1.65245998573769E-13 -3.737665191159958E-15
q -9.067315169047809E-15 2.376776647769315E-14 -3.532377617054325E-12 1.017431239065012E-13 -4.161274372688542E-13 9.934418644588333E-15
tp 1.418943758050828E-12 -3.532377617054325E-12 6.532777210447782E-9 -4.19857762419037E-11 1.430319581561507E-9 -1.008556467165761E-11
node -3.982602771852555E-14 1.017431239065012E-13 -4.19857762419037E-11 4.696441365608352E-10 -4.63209886842462E-10 8.494190681131506E-13
peri 1.65245998573769E-13 -4.161274372688542E-13 1.430319581561507E-9 -4.63209886842462E-10 7.759546787980981E-10 -2.867816990773091E-12
i -3.737665191159958E-15 9.934418644588333E-15 -1.008556467165761E-11 8.494190681131506E-13 -2.867816990773091E-12 1.861295305072459E-11

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 13.8   n/a MPO325093  
diameter diameter 5.260 km 0.474 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.232   0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91487 (1999 RT117)          Discovered 1999-Sep-09 by LINEAR at Socorro
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
2162-Nov-12 05:41 < 00:01 Europ 0.0396001936537268 0.0395696851545311 0.0396307061421862 6.96593054657546 6.96593050804579 2511029.737084016 0.513187671757387 1645.2213223979 47.6673410403649 22.408563948794 47480.0194097234 T 24 CATAB v2.0f-lin.ifort 2020-May-20 16:41:52 2020-May-20 16:41
2182-Nov-27 12:08 00:10 Iris 0.00471986243908162 0.00468169162802926 0.00475804531073041 3.84326896143386 3.84326864451876 2518350.005453423 9.67578042303739 1939.46713762327 52.3235479507154 -11.1888084581232 2639.32690954634 T 24 CATAB v2.0f-lin.ifort 2020-May-20 16:41:52 2020-May-20 16:41

Alternate Designations
 1999 RT117 = 2000 WP86 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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