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90817 Doylehall (1995 RO)
Classification: Main-belt Asteroid          SPK-ID: 2090817
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1340267658211606 4.4092e-08  
a 2.704849057009389 1.8897e-08 au
q 2.342326885864004 1.2145e-07 au
i 7.290396513971052 5.6493e-06 deg
node 219.9920461642899 5.6342e-05 deg
peri 193.9662694388751 6.3831e-05 deg
M 56.4848994172447 3.1095e-05 deg
tp 2458345.557149343437
(2018-Aug-15.05714934)
0.00013932 TDB
period 1624.848892062336
4.45
1.7028e-05
4.662e-08
d
yr
n .2215590642050848 2.3219e-09 deg/d
Q 3.067371228154773 2.143e-08 au
  Orbit Determination Parameters
   # obs. used (total)      460  
   data-arc span      8530 days (23.35 yr)  
   first obs. used      1995-09-01  
   last obs. used      2019-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56492  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 04:33:47  

Additional Information
 Earth MOID = 1.35366 au 
 Jupiter MOID = 2.29184 au 
 T_jup = 3.341 
[ 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 15.7   n/a MPO432446  
diameter diameter 4.481 km 0.135 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.061   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

90817 Doylehall           Discovered 1995 Sept. 1 by AMOS at Haleakala.
Doyle Hall is an astronomer and a key member of the Air Force Maui and Supercomputing (AMOS) team, which supports a number of minor planet programs, including JPL's Near-Earth Asteroid Tracking program.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050919/MPCPages.arcLast Updated: 2005-09-26

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Alternate Designations
 1995 RO = 2000 VN31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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