Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1286297822326142 6.2092e-08  
a 2.671860461219645 1.737e-08 au
q 2.32817963193703 1.6193e-07 au
i 13.57730980981077 4.3558e-06 deg
node 282.3158275107222 2.1767e-05 deg
peri 72.29995223317687 2.7884e-05 deg
M 249.9365157760104 1.8867e-05 deg
tp 2459488.207958875758
(2021-Sep-30.70795888)
8.5375e-05 TDB
period 1595.214493100741
4.37
1.5556e-05
4.259e-08
d
yr
n .2256749807358134 2.2007e-09 deg/d
Q 3.01554129050226 1.9605e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1149  
   data-arc span      7246 days (19.84 yr)  
   first obs. used      1999-07-13  
   last obs. used      2019-05-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48165  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:31:53  

Additional Information
 Earth MOID = 1.36289 au 
 Jupiter MOID = 2.44281 au 
 T_jup = 3.329 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457155.5 (2015-May-13.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1276418055384867 6.1931e-08  
q 2.331535796011034 1.6102e-07 au
tp 2457894.666951134886
(2017-May-21.16695113)
8.0898e-05 TDB
node 282.3360551981932 2.1766e-05 deg
peri 72.63434463191467 2.797e-05 deg
i 13.57528900203305 4.3553e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1149  
   data-arc span      7246 days (19.84 yr)  
   first obs. used      1999-07-13  
   last obs. used      2019-05-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48165  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:31:53  

Additional Information
 Jupiter MOID = 2.44281 au 
 T_jup = 3.329 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.835442241445336E-15 -9.931267148453926E-15 1.455746091565206E-12 -4.526453587830219E-14 1.475008228512746E-13 -4.306538262948749E-15
q -9.931267148453926E-15 2.592707802098718E-14 -3.625779698224106E-12 1.155029912894753E-13 -3.722997784704083E-13 1.135199493304534E-14
tp 1.455746091565206E-12 -3.625779698224106E-12 6.544494840014153E-9 -4.497380075174916E-11 1.432620826755029E-9 -1.085774426301573E-11
node -4.526453587830219E-14 1.155029912894753E-13 -4.497380075174916E-11 4.737661446173674E-10 -4.674601069871637E-10 2.052766123345254E-12
peri 1.475008228512746E-13 -3.722997784704083E-13 1.432620826755029E-9 -4.674601069871637E-10 7.822998825846949E-10 -4.171542423949655E-12
i -4.306538262948749E-15 1.135199493304534E-14 -1.085774426301573E-11 2.052766123345254E-12 -4.171542423949655E-12 1.896824661335723E-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

[ show close-approach data ]
Alternate Designations
 1999 RT117 = 2000 WP86 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-07 11:05 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin