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28803 Roe (2000 HR79)
Classification: Main-belt Asteroid          SPK-ID: 2028803
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09089665189384845 4.3592e-08  
a 2.56378645513528 1.1364e-08 au
q 2.330746850192685 1.1239e-07 au
i 15.74371464681112 3.6002e-06 deg
node 117.1916509028522 1.6764e-05 deg
peri 293.4134956732706 2.713e-05 deg
M 219.0640525850441 2.1749e-05 deg
tp 2459983.503213197576
(2023-Feb-08.00321320)
9.1754e-05 TDB
period 1499.412751871863
4.11
9.9689e-06
2.729e-08
d
yr
n .2400939965000144 1.5963e-09 deg/d
Q 2.796826060077876 1.2396e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1335  
   data-arc span      9744 days (26.68 yr)  
   first obs. used      1994-12-02  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52894  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 23:29:37  

Additional Information
 Earth MOID = 1.38953 au 
 Jupiter MOID = 2.4913 au 
 T_jup = 3.375 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457381.5 (2015-Dec-25.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08949647386420886 4.3293e-08  
q 2.336123408317397 1.1131e-07 au
tp 2456986.054624363376
(2014-Nov-24.55462436)
8.9943e-05 TDB
node 117.2589266469637 1.6751e-05 deg
peri 293.9681428186731 2.7523e-05 deg
i 15.74606271531044 3.6007e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1335  
   data-arc span      9744 days (26.68 yr)  
   first obs. used      1994-12-02  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52894  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 23:29:37  

Additional Information
 Jupiter MOID = 2.4913 au 
 T_jup = 3.375 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.87424975329735E-15 -4.797679667670071E-15 -1.248549580182093E-12 -2.151294276809671E-14 -3.263122600941386E-13 -6.214725533755081E-15
q -4.797679667670071E-15 1.238980965692216E-14 3.271392707296587E-12 5.660813133701352E-14 8.574634477598133E-13 1.630347219533994E-14
tp -1.248549580182093E-12 3.271392707296587E-12 8.089749577106649E-9 3.807649971202002E-11 1.989799678015957E-9 2.168424748065692E-12
node -2.151294276809671E-14 5.660813133701352E-14 3.807649971202002E-11 2.805813422042412E-10 -2.600883723743389E-10 1.949662590992379E-12
peri -3.263122600941386E-13 8.574634477598133E-13 1.989799678015957E-9 -2.600883723743389E-10 7.575327765250345E-10 -1.204519350780755E-12
i -6.214725533755081E-15 1.630347219533994E-14 2.168424748065692E-12 1.949662590992379E-12 -1.204519350780755E-12 1.29652095571974E-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 14.78   n/a MPO636485  
rotation period rot_per 12.5321 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

28803 Roe           Discovered 2000 Apr. 28 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Henry G. Roe (b. 1975), is an assistant astronomer at Lowell Observatory. His research interests include weather on Titan and methane in the outer solar system.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110615/MPCPages.arcLast Updated: 2013-03-28

Alternate Designations
 2000 HR79 = 1994 XW3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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