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 ]  
91478 (1999 RO99)
Classification: Main-belt Asteroid          SPK-ID: 2091478
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3252539442120807 4.9743e-08  
a 2.757027501304849 1.3854e-08 au
q 1.860293432204269 1.3743e-07 au
i 8.070012817317537 5.9344e-06 deg
node 226.282389316145 2.9957e-05 deg
peri 174.1343801683381 3.071e-05 deg
M 228.5127908677156 1.0659e-05 deg
tp 2460007.218506875304
(2023-Mar-03.71850688)
5.3402e-05 TDB
period 1672.091634813831
4.58
1.2603e-05
3.451e-08
d
yr
n .2152992052018023 1.6228e-09 deg/d
Q 3.653761570405429 1.836e-08 au
  Orbit Determination Parameters
   # obs. used (total)      673  
   data-arc span      14525 days (39.77 yr)  
   first obs. used      1981-10-23  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52044  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 18:17:36  

Additional Information
 Earth MOID = .868288 au 
 Jupiter MOID = 1.77535 au 
 T_jup = 3.250 
[ 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 15.16   n/a MPO637243  
diameter diameter 2.732 km 0.826 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.237   0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91478 (1999 RO99)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RO99 = 1981 UR13 
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-24 18:06 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin