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
JPL Small-Body Database Browser
Search: [ help ]  
85689 (1998 RT55)
Classification: Main-belt Asteroid          SPK-ID: 2085689
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08446251018600422 5.2674e-08  
a 2.78259005943664 1.7099e-08 au
q 2.547565518197998 1.4857e-07 au
i 3.370779556209658 5.3476e-06 deg
node 254.8584668568625 8.34e-05 deg
peri 121.1180665308479 8.7509e-05 deg
M 229.4400581639107 2.8778e-05 deg
tp 2459615.364923032844
(2022-Feb-04.86492303)
0.00013799 TDB
period 1695.400359244324
4.64
1.5627e-05
4.278e-08
d
yr
n .2123392259751907 1.9572e-09 deg/d
Q 3.017614600675281 1.8543e-08 au
  Orbit Determination Parameters
   # obs. used (total)      688  
   data-arc span      9801 days (26.83 yr)  
   first obs. used      1993-08-13  
   last obs. used      2020-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56324  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:17:56  

Additional Information
 Earth MOID = 1.55087 au 
 Jupiter MOID = 2.41772 au 
 T_jup = 3.325 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457318.5 (2015-Oct-23.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08437125412785719 5.2821e-08  
q 2.547478131034695 1.4884e-07 au
tp 2457923.887322034079
(2017-Jun-19.38732203)
0.00013118 TDB
node 254.8713707001563 8.34e-05 deg
peri 121.9761625762849 8.7475e-05 deg
i 3.370836047456625 5.3482e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      688  
   data-arc span      9801 days (26.83 yr)  
   first obs. used      1993-08-13  
   last obs. used      2020-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56324  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:17:56  

Additional Information
 Jupiter MOID = 2.41772 au 
 T_jup = 3.325 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.790103785259882E-15 -7.818026739014349E-15 1.859787673796587E-12 4.380701238584931E-15 3.758170894435031E-13 -2.116131834863431E-16
q -7.818026739014349E-15 2.215268488789019E-14 -4.458872146849202E-12 -1.424634038350418E-14 -9.180135832814589E-13 9.620020033821744E-16
tp 1.859787673796587E-12 -4.458872146849202E-12 1.720694923532753E-8 1.973729280298558E-11 3.489366344899038E-9 -6.535260152102429E-13
node 4.380701238584931E-15 -1.424634038350418E-14 1.973729280298558E-11 6.955540188503722E-9 -6.939224154357961E-9 -1.793257686232947E-10
peri 3.758170894435031E-13 -9.180135832814589E-13 3.489366344899038E-9 -6.939224154357961E-9 7.651796944608053E-9 1.788806014839282E-10
i -2.116131834863431E-16 9.620020033821744E-16 -6.535260152102429E-13 -1.793257686232947E-10 1.788806014839282E-10 2.86036137340012E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.1   n/a MPO325053  
diameter diameter 6.632 km 0.210 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.048   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85689 (1998 RT55)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1998 RT55 = 2003 UW46 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-26 22:23 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin