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19638 Johngenereid (1999 RH57)
Classification: Main-belt Asteroid          SPK-ID: 2019638
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0346956231570204 3.282e-08  
a 2.75588055718034 1.3414e-08 au
q 2.660263563902651 9.2034e-08 au
i 5.764123654447754 3.9801e-06 deg
node 136.3821072104391 3.9357e-05 deg
peri 152.6604408247892 7.4238e-05 deg
M 275.4525636987399 6.3888e-05 deg
tp 2459592.952369518654
(2022-Jan-13.45236952)
0.00029691 TDB
period 1671.048339340478
4.58
1.22e-05
3.34e-08
d
yr
n .2154336242254267 1.5729e-09 deg/d
Q 2.851497550458028 1.3879e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1239  
   data-arc span      8866 days (24.27 yr)  
   first obs. used      1996-12-12  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53945  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:57:13  

Additional Information
 Earth MOID = 1.64365 au 
 Jupiter MOID = 2.20984 au 
 T_jup = 3.335 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457218.5 (2015-Jul-15.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03503945041425098 3.282e-08  
q 2.661413498936871 9.2187e-08 au
tp 2457905.360350085914
(2017-May-31.86035009)
0.00029238 TDB
node 136.4215599855766 3.9311e-05 deg
peri 149.2061623536216 7.3585e-05 deg
i 5.765542132596857 3.9816e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1239  
   data-arc span      8866 days (24.27 yr)  
   first obs. used      1996-12-12  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53945  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:57:13  

Additional Information
 Jupiter MOID = 2.20984 au 
 T_jup = 3.335 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.077179703014664E-15 -2.995631257002303E-15 3.954276304443708E-13 -3.752501350109753E-16 1.023781336092613E-13 -2.364671651116853E-17
q -2.995631257002303E-15 8.498515333270318E-15 -6.289070380948156E-13 1.287452719166532E-15 -1.992408324499676E-13 1.585559915018868E-16
tp 3.954276304443708E-13 -6.289070380948156E-13 8.548851153125546E-8 1.829921083140924E-12 1.820302515465549E-8 -1.845444916037126E-12
node -3.752501350109753E-16 1.287452719166532E-15 1.829921083140924E-12 1.545323025196856E-9 -1.53690302949966E-9 2.802750346630941E-11
peri 1.023781336092613E-13 -1.992408324499676E-13 1.820302515465549E-8 -1.53690302949966E-9 5.414686246744225E-9 -2.826951074085941E-11
i -2.364671651116853E-17 1.585559915018868E-16 -1.845444916037126E-12 2.802750346630941E-11 -2.826951074085941E-11 1.585316107644985E-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 14.64   n/a E2021B10  
diameter diameter 5.748 km 0.171 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 129.804 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.]
geometric albedo albedo 0.093   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19638 Johngenereid           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
John Gene Reid (b. 1990) is a finalist in the 2003 Discovery Channel Young Scientist Challenge, a middle school science competition, for his botany and zoology project. He attends the Moore Middle School, Redlands, California.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20031010/MPCPages.arcLast Updated: 2003-10-10

Alternate Designations
 1999 RH57 = 1998 HK121 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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