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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
4153 Roburnham (1985 JT1)
Classification: Main-belt Asteroid          SPK-ID: 2004153
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1670143954821592 1.8367e-08  
a 3.143159962331561 1.3636e-08 au
q 2.618207001319029 5.8588e-08 au
i 1.425178876510116 1.4391e-07 deg
node 66.04408527907896 1.1491e-05 deg
peri 207.2487819186822 1.0743e-05 deg
M 145.3193144609138 6.3245e-06 deg
tp 2458574.883802947933
(2019-Apr-01.38380295)
3.3108e-05 TDB
period 2035.392418660907
5.57
1.3245e-05
3.626e-08
d
yr
n .176870070213215 1.151e-09 deg/d
Q 3.668112923344093 1.5913e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3105  
   data-arc span      15306 days (41.91 yr)  
   first obs. used      1979-04-24  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45072  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 14:17:08  

Additional Information
 Earth MOID = 1.60188 au 
 Jupiter MOID = 1.44683 au 
 T_jup = 3.188 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457171.5 (2015-May-29.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1678810374141488 1.8212e-08  
q 2.615002662866339 5.8116e-08 au
tp 2456544.446136162639
(2013-Sep-08.94613616)
2.9598e-05 TDB
node 66.03998143140016 1.1481e-05 deg
peri 208.0171193879895 1.0701e-05 deg
i 1.42676603964565 1.4428e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3105  
   data-arc span      15306 days (41.91 yr)  
   first obs. used      1979-04-24  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45072  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 14:17:08  

Additional Information
 Jupiter MOID = 1.44683 au 
 T_jup = 3.188 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.316907293938131E-16 -1.037737101148682E-15 2.980915371391046E-13 -2.975555704642204E-14 5.168328100689611E-14 3.793326252692907E-17
q -1.037737101148682E-15 3.377497799563796E-15 -9.254437977733042E-13 8.296264887963487E-14 -1.434117092964057E-13 -4.106974393092369E-17
tp 2.980915371391046E-13 -9.254437977733042E-13 8.760625895873209E-10 9.118069683789948E-11 2.42621604086543E-11 -8.933454422365433E-13
node -2.975555704642204E-14 8.296264887963487E-14 9.118069683789948E-11 1.31809704491061E-10 -1.145349652438381E-10 -1.041375323075773E-12
peri 5.168328100689611E-14 -1.434117092964057E-13 2.42621604086543E-11 -1.145349652438381E-10 1.145203080634933E-10 8.87614337497575E-13
i 3.793326252692907E-17 -4.106974393092369E-17 -8.933454422365433E-13 -1.041375323075773E-12 8.87614337497575E-13 2.081749027319967E-14

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 12.41   n/a E2021B10  
diameter diameter 17.337 km 0.167 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.077   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4153 Roburnham (1985 JT1)          Discovered 1985-May-14 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1985 JT1 = 1979 HK2 = 1981 UF17 = 1981 UJ21 = 1984 DM2 = 1985 KE1 = 1986 RJ3 = 1986 WE8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-20 06:36 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin