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24280 Rohenderson (1999 XE172)
Classification: Main-belt Asteroid          SPK-ID: 2024280
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1582077135629195 1.3597e-08  
a 2.345051115694014 6.2952e-09 au
q 1.974045940491891 3.229e-08 au
i 5.122837777564042 8.0197e-07 deg
node 322.7733011422168 6.4946e-06 deg
peri 53.63380569226329 8.806e-06 deg
M 63.87386314213711 5.2921e-06 deg
tp 2459163.772566641619
(2020-Nov-10.27256664)
1.9402e-05 TDB
period 1311.67698159385
3.59
5.2817e-06
1.446e-08
d
yr
n .2744578162548491 1.1052e-09 deg/d
Q 2.716056290896138 7.2911e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2327  
   data-arc span      25007 days (68.47 yr)  
   first obs. used      1952-10-24  
   last obs. used      2021-04-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45348  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:58:37  

Additional Information
 Earth MOID = .979199 au 
 Jupiter MOID = 2.77225 au 
 T_jup = 3.539 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457659.5 (2016-Sep-28.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1594956475275422 1.3567e-08  
q 1.970670790395454 3.2279e-08 au
tp 2457852.516006013421
(2017-Apr-09.01600601)
2.0648e-05 TDB
node 322.8488485479145 6.5002e-06 deg
peri 53.66352088352036 8.7781e-06 deg
i 5.120741870714516 8.0196e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2327  
   data-arc span      25007 days (68.47 yr)  
   first obs. used      1952-10-24  
   last obs. used      2021-04-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45348  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:58:37  

Additional Information
 Jupiter MOID = 2.77225 au 
 T_jup = 3.539 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.840673082080165E-16 -4.319655549672137E-16 -1.343111214014868E-13 -7.297993377168107E-15 -2.311295121992238E-14 -3.662206154651735E-16
q -4.319655549672137E-16 1.041912982747843E-15 2.721920551630681E-13 1.917048561989573E-14 3.988897004556058E-14 1.119531552556203E-15
tp -1.343111214014868E-13 2.721920551630681E-13 4.263550701432987E-10 -1.905958089718215E-11 1.195009646342137E-10 -2.672569907874735E-12
node -7.297993377168107E-15 1.917048561989573E-14 -1.905958089718215E-11 4.225231097551832E-11 -4.749159351099473E-11 4.117097624895056E-12
peri -2.311295121992238E-14 3.988897004556058E-14 1.195009646342137E-10 -4.749159351099473E-11 7.705436518816799E-11 -4.828128474130926E-12
i -3.662206154651735E-16 1.119531552556203E-15 -2.672569907874735E-12 4.117097624895056E-12 -4.828128474130926E-12 6.431383158746952E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.04   n/a E2021B10  
rotation period rot_per 26.5544 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.]

24280 Rohenderson           Discovered 1999 Dec. 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team in Socorro.
Robin Henderson mentored a finalist in the 2008 Intel Science Talent Search (STS), a science competition for high school seniors. She teaches at the Spring Valley High School, Columbia, South Carolina.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080221/MPCPages.arcLast Updated: 2008-03-05

Alternate Designations
 1999 XE172 = 1952 UA1 = 1991 OD1 = 1995 YS22 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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