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JPL Small-Body Database Browser
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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 | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03463810457095044 3.3893e-08  
a 2.756467282306633 1.4294e-08 au
q 2.660988480335692 9.393e-08 au
i 5.763918179680817 4.1814e-06 deg
node 136.3807587777954 4.1046e-05 deg
peri 152.3152310095662 7.8429e-05 deg
M 232.7208772181949 6.7945e-05 deg
tp 2459591.493034921953
(2022-Jan-11.99303492)
0.0003162 TDB
period 1671.582015352459
4.58
1.3002e-05
3.56e-08
d
yr
n .2153648440181936 1.6752e-09 deg/d
Q 2.851946084277574 1.4789e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1157  
   data-arc span      8452 days (23.14 yr)  
   first obs. used      1996-12-12  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54781  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:52:50  

Additional Information
 Earth MOID = 1.64635 au 
 Jupiter MOID = 2.20986 au 
 T_jup = 3.335 
[ 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 14.6   n/a MPO381421  
diameter diameter 5.748 km 0.171 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
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

[ show close-approach data ]
Alternate Designations
 1999 RH57 = 1998 HK121 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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