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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3249999334646326 5.9048e-08  
a 2.757499674524003 1.4481e-08 au
q 1.861312463774956 1.627e-07 au
i 8.068518918799075 6.9565e-06 deg
node 226.2839661968832 4.2333e-05 deg
peri 174.1715807854035 4.3225e-05 deg
M 143.1905867526606 1.0856e-05 deg
tp 2458335.251966276588
(2018-Aug-04.75196628)
4.6785e-05 TDB
period 1672.521201090605
4.58
1.3175e-05
3.607e-08
d
yr
n .2152439082776672 1.6955e-09 deg/d
Q 3.65368688527305 1.9188e-08 au
  Orbit Determination Parameters
   # obs. used (total)      576  
   data-arc span      13971 days (38.25 yr)  
   first obs. used      1981-10-23  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53725  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:30:45  

Additional Information
 Earth MOID = .8699 au 
 Jupiter MOID = 1.77312 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 15.1   n/a MPO266324  
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 ]
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